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# Thinkly For Digital Business

## Sitemaps
- [XML Sitemap](https://chat-deep.ai/sitemap_index.xml): Includes all crawlable and indexable pages.

## Posts
- [DeepSeek Coding Benchmark Across Python, JavaScript, Java, Go, and C#](https://chat-deep.ai/docs/deepseek-coding-benchmark/): In this controlled DeepSeek coding benchmark, deepseek-v4-pro produced five safely extractable programs and all five passed every test. deepseek-v4-flash (the since-retired V4 Flash) produced two safely extractable programs, both of which passed every test; its Java, Go, and C# cells failed at the extraction gate and were not compiled. The combined result was 7 of 10 programs passing the full pipeline and 98 of 140 model-language test opportunities passing.
- [DeepSeek API Updates: Changelog and Deprecated Models Tracker](https://chat-deep.ai/docs/deepseek-api-updates/): Track DeepSeek API updates, current V4 model IDs, deprecated and unlisted aliases, pricing and contract changes, plus dated compatibility checks and migration guidance.
- [DeepSeek API Balance Endpoint: Check Credits, Billing, and Availability](https://chat-deep.ai/docs/deepseek-api-balance/): The DeepSeek API balance endpoint is GET https://api.deepseek.com/user/balance. Send a DeepSeek API key in the Bearer Authorization header, and the response tells you whether the account currently has sufficient balance for API calls and how its balance is divided between granted and topped-up funds.
- [DeepSeek Temperature, Top-P, Stop Sequences, and Sampling Settings](https://chat-deep.ai/docs/deepseek-temperature-settings/): DeepSeek temperature settings are easy to configure and easy to test incorrectly. The reason is specific to current DeepSeek V4: thinking mode is enabled by default, while DeepSeek's official guide says temperature and top_p have no effect in thinking mode. A request can be accepted even though those sampling fields are not controlling the response.
- [DeepSeek System Prompts: Roles, Patterns, and Production Examples](https://chat-deep.ai/docs/deepseek-system-prompts/): A DeepSeek system prompt is the durable instruction layer that defines an application's role, rules, output contract, and treatment of untrusted data. The user message should normally carry the immediate request and its data. That separation is useful, but it is not magic: a system prompt is not a secret store, a schema validator, or a complete defense against prompt injection.
- [DeepSeek Multi-Turn Conversations: Managing History, Context, and Cost](https://chat-deep.ai/docs/deepseek-multi-turn-conversations/): Pricing snapshot notice: Historical results and costs on this page are frozen to the price snapshot used at test time and have not been recalculated. Traffic billed from 2026-08-16 16:00 UTC onward uses DeepSeek’s current peak/off-peak schedule. Check our DeepSeek pricing guide and API cost calculator before estimating new traffic.
- [DeepSeek V4 Architecture Explained: MoE, Hybrid Attention, mHC, 1M Context, and Agents](https://chat-deep.ai/docs/deepseek-v4-architecture/): A source-backed explanation of DeepSeek V4's MoE, CSA/HCA hybrid attention, mHC residual design, 1M-token context, and agent training, paired with live API tests up to 847,423 input tokens.
- [DeepSeek finish_reason Values and Troubleshooting](https://chat-deep.ai/docs/deepseek-finish-reason/): DeepSeek finish_reason tells an application why a Chat Completions response stopped and what it should do next. The official OpenAI-compatible API documents five terminal values: stop, length, content_filter, tool_calls, and insufficient_system_resource.
- [DeepSeek V4 Context and Output Limits: A Token Planning Guide](https://chat-deep.ai/docs/deepseek-v4-context-output-limits/): DeepSeek’s two current hosted model IDs—deepseek-flash and deepseek-v4-pro—each list a 1,000,000-token context length and a 384,000-token maximum output. Prompt and generated completion share that single context envelope.
- [DeepSeek Vision API: How to Send Images to DeepSeek (2026)](https://chat-deep.ai/docs/deepseek-api-vision-input/): Yes, the DeepSeek API accepts images through deepseek-flash, the API name for DeepSeek-V4.1-Flash. It accepts text and images and returns text, while deepseek-v4-pro does not support image input, as confirmed in the official model table.
- [Does the DeepSeek API Support File Uploads?](https://chat-deep.ai/docs/deepseek-api-file-upload/): The DeepSeek Files API is now live for image uploads. You can upload JPEG, PNG, GIF, or WebP, receive a reusable file_id, and reference it with the deepseek-flash model (DeepSeek-V4.1-Flash). This is not a general document store: PDF, DOCX, spreadsheets, audio, and arbitrary files remain unsupported.
- [Does the DeepSeek API Include Web Search? Chat vs API Explained](https://chat-deep.ai/docs/deepseek-api-web-search/): The DeepSeek web search API question depends on the endpoint. The current Responses API has a provider-executed web_search tool, while the OpenAI-compatible Chat Completions endpoint still exposes caller-executed function tools rather than hosted search. Consumer Chat and the documented Claude Code integration are separate surfaces.
- [How to Migrate deepseek-chat and deepseek-reasoner to DeepSeek V4](https://chat-deep.ai/docs/migrate-deepseek-chat-reasoner-to-v4/): To preserve the documented thinking-mode configuration when migrating deepseek-chat, use deepseek-flash with thinking explicitly disabled. For deepseek-reasoner, explicitly enable thinking. This maps the request configuration; it does not guarantee identical answers, latency, or application behavior. Validate the replacement on your workload.
- [DeepSeek Anthropic API Compatibility: Complete Field Mapping](https://chat-deep.ai/docs/deepseek-anthropic-api-compatibility/): DeepSeek Anthropic API compatibility lets an Anthropic Messages client call DeepSeek by changing the SDK base URL, API key, and model value—but it is not full Claude feature parity. The route now supports text workflows on V4.1-Flash and Pro, plus image input on deepseek-flash (V4.1-Flash). General document blocks remain unsupported.
- [How to Read DeepSeek Token Usage and Cache Fields](https://chat-deep.ai/docs/deepseek-token-usage-fields/): DeepSeek token usage is returned in different field shapes across Chat Completions, the Responses API, and the Anthropic-compatible Messages API. This guide separates those contracts, shows how automatic context-cache usage affects billing, adds Vision image-token accounting, and calculates current peak or off-peak cost without treating one interface’s field names as universal.
- [DeepSeek for Customer Operations and Commerce: Support, Sales, Ecommerce, and Service Workflows](https://chat-deep.ai/solutions/deepseek-customer-operations-commerce/): DeepSeek can help customer-facing teams classify requests, retrieve approved information, draft responses, summarize conversations, and propose actions. It is not a helpdesk, CRM, ecommerce platform, telephony service, or autonomous decision-maker. A production implementation still needs business data, permission checks, workflow software, validation, monitoring, and people who remain accountable for the outcome.
- [Build a Secure DeepSeek Mobile App: Chat, Vision, iOS, and Android](https://chat-deep.ai/docs/deepseek-mobile-app-development/): Build secure iOS and Android DeepSeek features through a backend, with Vision uploads, tenant-bound file_id, streaming, rate limits and key safety.
- [DeepSeek Vector Database Guide: Qdrant, Pinecone, Weaviate, Chroma, and Milvus for RAG](https://chat-deep.ai/docs/deepseek-vector-database-guide/): A DeepSeek Vector Database usually means a RAG architecture where DeepSeek is the LLM that generates the answer, while a separate vector database stores and retrieves embeddings. DeepSeek’s official API documentation focuses on chat/reasoning access through OpenAI-compatible and Anthropic-compatible formats, so you should not treat DeepSeek itself as the vector store.
- [DeepSeek for Obsidian and Personal Knowledge Management: Notes, Summaries, Zettelkasten, and Research Workflows](https://chat-deep.ai/use-cases/deepseek-for-obsidian-pkm/): Plugin ecosystem reviewed: July 29, 2026 · DeepSeek API catalog checked: September 24, 2026
- [DeepSeek API Gateway & Proxy Architecture](https://chat-deep.ai/guide/deepseek-gateway-proxy-architecture/): Build a secure DeepSeek API gateway with key isolation, model routing, rate limits, retries, audit logs, cost controls, and tool-call safeguards. Last verified: August 24, 2026.
- [DeepSeek for Excel Analysis: How to Analyze Spreadsheets, Create Formulas, and Find Insights](https://chat-deep.ai/use-cases/deepseek-for-excel-analysis/): DeepSeek for Excel Analysis can help you understand spreadsheet data, generate Excel formulas, write VBA or Python code, summarize trends, detect possible anomalies, and create analysis plans. However, DeepSeek should not be treated as a guaranteed calculator. Use it for guidance, explanations, formulas, and insight generation, then verify exact calculations in Excel, Python, SQL, or a trusted BI tool.
- [DeepSeek for Enterprise AI: Deployment, Security, Governance, and Business Workflows](https://chat-deep.ai/solutions/deepseek-enterprise-ai/): Last verified: July 21, 2026.
- [DeepSeek AI Agents: Architecture, Vision, Tools & Python](https://chat-deep.ai/solutions/deepseek-ai-agents/): Build safer DeepSeek agents with Flash, Pro and Vision Exp, exact model routing, image validation, tool approvals, telemetry, fallbacks and Python examples.
- [DeepSeek RAG Knowledge Base: Retrieval, Citations and Security](https://chat-deep.ai/solutions/deepseek-rag-knowledge-base/): RAG architecture and bounded alias evidence last verified: July 28, 2026. Current hosted catalog, Vision, Files, and embedding status rechecked: September 24, 2026.
- [DeepSeek Data Residency: Where Is Your Data Processed and Stored?](https://chat-deep.ai/privacy-security/deepseek-data-residency/): Updated: August 25, 2026
- [DeepSeek vs ChatGPT: Web App and API Tests (2026)](https://chat-deep.ai/comparison/chatgpt/): Official specifications and benchmark inputs were verified August 7, 2026. This update reports a completed 16-cell consumer-web matrix and an isolated 55-request API run. Consumer-product and API results remain separate datasets with separate denominators and no cross-surface score.
- [DeepSeek for Students: How to Study, Get Homework Help, and Revise Safely](https://chat-deep.ai/use-cases/deepseek-for-students/): Study workflow, policy, and safety review: July 21, 2026 · Current API image and Files contract rechecked: September 24, 2026 · Method: official DeepSeek product pages and policies, university academic-integrity guidance, and established study-strategy resources.
- [How to Use DeepSeek AI for Translation](https://chat-deep.ai/use-cases/deepseek-ai-for-translation/): Last updated: August 24, 2026
- [DeepSeek Privacy Policy Explained: What Data Does DeepSeek Collect?](https://chat-deep.ai/privacy-security/deepseek-privacy-policy/): Last reviewed: August 25, 2026
- [What Not to Paste Into DeepSeek AI: A Practical Privacy & Security Checklist](https://chat-deep.ai/privacy-security/what-not-to-paste-into-deepseek/): Last reviewed: August 25, 2026.
- [DeepSeek Power BI Integration: Power Query Guide](https://chat-deep.ai/guide/power-bi-deepseek-integration/): Connect DeepSeek to Power BI with corrected Power Query M, structured JSON, refresh controls, error handling, security, and production guidance. Last technically reviewed: August 24, 2026.
- [DeepSeek for Google Sheets: Apps Script & AI Formulas](https://chat-deep.ai/guide/google-sheets/): Connect DeepSeek to Google Sheets with Apps Script, secure API keys, reusable text and Vision workflows, input limits, and safer spreadsheet automation. Last verified: August 24, 2026.
- [How to Use DeepSeek AI to Write Better Emails in English](https://chat-deep.ai/guide/deepseek-write-better-english-emails/): Use DeepSeek to improve an English email’s grammar, tone and organization—not to supply facts you have not provided. A polished message can still invent a reason for a delay, offer a meeting time you never approved or turn a tentative date into a promise. The workflow below keeps those checks separate from language editing.
- [DeepSeek R2 Tracker: Release Date, Official Updates and Rumors](https://chat-deep.ai/news/deepseek-r2-tracker-release-date/): Has DeepSeek R2 been released? As verified on August 24, 2026, Chat-Deep.ai found no official DeepSeek R2 release announcement, model card, API model ID, GitHub repository, Hugging Face model page, or pricing row. DeepSeek’s current official API catalog (rechecked September 24, 2026) instead lists deepseek-flash (DeepSeek-V4.1-Flash, text and image input) and deepseek-v4-pro. None is identified by DeepSeek as R2.
- [DeepSeek vs Microsoft Copilot: Live Tests, Pricing, and Verdict (2026)](https://chat-deep.ai/comparison/microsoft-copilot/): DeepSeek vs Microsoft Copilot is not a simple model-versus-model contest. DeepSeek provides a consumer chat service, a token-priced developer API, and open-weight models. Microsoft uses the Copilot name for a free consumer assistant, Microsoft 365 experiences, workplace agents, and other products. GitHub Copilot is a separate coding product.
- [DeepSeek vs Perplexity: Which AI Tool Should You Use for Research, Coding, and Everyday Work?](https://chat-deep.ai/comparison/perplexity/): DeepSeek official API documentation rechecked: September 23, 2026. Any observation explicitly dated July 29 remains a historical snapshot. Perplexity vendor claims retain their existing verification boundary unless a newer primary-source check is stated beside the claim. This is a documentation-based comparison, not a matched benchmark of answer quality. Recommendations below identify product features to evaluate, not proven research or coding winners.
- [DeepSeek vs Mistral: Which AI Model Should You Use for Coding, Reasoning, Cost, and Privacy?](https://chat-deep.ai/comparison/mistral-ai/): DeepSeek vs Mistral, live evidence from July 28, 2026; current DeepSeek contract rechecked September 24, 2026: DeepSeek currently serves two hosted API IDs: deepseek-flash, which accepts text and images and returns text, and the text-only deepseek-v4-pro. Both list 1M-token context and maximum output up to 384K. Mistral’s current documentation describes a platform that includes multimodal models, coding agents, document tools, smaller open-weight models, and organization controls. This feature inventory does not establish overall platform superiority. Neither provider is the universal winner; the right choice depends on the product layer and workload you are actually comparing.
- [DeepSeek vs Qwen (2026): Models, Pricing and Which to Use](https://chat-deep.ai/comparison/qwen/): DeepSeek Flash is the lowest-cost option in this comparison backed by MIT-licensed model weights. Choose it for affordable coding and agents when permissive licensing and repeated, cacheable context matter. Its advantages are low cache-hit pricing and MIT-licensed open weights—not an unconditional win on every token price.
- [DeepSeek API Key: How to Create, Test, Store, Rotate, and Revoke One Safely](https://chat-deep.ai/docs/deepseek-api-key/): A practical, independently tested guide to creating and securing a DeepSeek API key, with live authentication, rotation, revocation, and leak-prevention checks.
- [DeepSeek vs Llama 4: Live API Tests, Cost, Context, and Deployment](https://chat-deep.ai/comparison/llama/): DeepSeek vs Llama is not a one-model contest. DeepSeek's current hosted catalog has two models—V4.1-Flash (deepseek-flash), which accepts text and images and returns text, and the text-only V4-Pro (deepseek-v4-pro). Llama 4 is Meta's open-weight family for text and image input, normally accessed through downloaded weights or a separate inference provider. The live benchmark below predates DeepSeek Vision Exp and remains a dated comparison of the exact routes that were actually tested.
- [Is DeepSeek Free? Chat, App, API and Open Weights — Every Limit Explained](https://chat-deep.ai/guide/is-deepseek-ai-free/): Last verified: September 24, 2026, against DeepSeek’s website and API pricing page, and September 19, 2026, against its Help Center, Terms of Use, Privacy Policy, App Store and Google Play listings, and Hugging Face model cards.
- [DeepSeek on Janitor AI: Compatibility Test, API Key Risks & Safer Options](https://chat-deep.ai/guide/deepseek-on-janitor-ai/): Independent dated compatibility test covering DeepSeek on Janitor AI, unverified API-key handling, evidence limits, and safer server-side alternatives.
- [DeepSeek for Data Analysis: CSV, Excel, SQL & Python](https://chat-deep.ai/use-cases/deepseek-for-data-analysis/): Use DeepSeek to plan data analysis, draft pandas and SQL, interpret verified results, and build safer CSV, Excel, and structured-output workflows. Last verified: July 28, 2026.
- [DeepSeek Workflow Automation: API, Agents & No-Code](https://chat-deep.ai/guide/deepseek-workflow-automation/): Build reliable DeepSeek automations with JSON output, tool calls, n8n, Make, Apps Script, validation, human approval, retries, and secure API patterns. Last verified: August 24, 2026.
- [DeepSeek GGUF vs Safetensors: Which Format Should You Use?](https://chat-deep.ai/guide/deepseek-gguf-vs-safetensors/): If you want to run DeepSeek locally in Ollama, llama.cpp, LM Studio, GPT4All, or a similar desktop app, choose GGUF. If you want the original model checkpoint for PyTorch, Transformers, research, fine-tuning, or full-precision workflows, choose Safetensors. The real answer to DeepSeek GGUF vs Safetensors is not “one is always better.” They are built for different parts of the LLM workflow.
- [DeepSeek V5 Release Date and 2026 Roadmap: Official Status](https://chat-deep.ai/guide/deepseek-roadmap-rumors/): Quick answer: DeepSeek has not published an official V5 release date or a single forward-looking roadmap with guaranteed launch dates in the first-party sources reviewed through August 24, 2026. The current hosted API catalog contains deepseek-flash (DeepSeek-V4.1-Flash, text and image input) and deepseek-v4-pro. The August 21 Vision and Files release did not announce R2 or V5.
- [DeepSeek Chrome Extension: Official Status & Permissions](https://chat-deep.ai/guide/deepseek-chrome-extension/): Official status checked September 4, 2026: we found no Chrome-extension link on DeepSeek’s official English product page. We therefore cannot verify a DeepSeek-operated Chrome extension from that page. This is a dated check of that source, not proof that no extension exists anywhere. Recheck the official product links before installing.

## Pages
- [DeepSeek Download: Windows, Mac, PC, Android and iOS (2026)](https://chat-deep.ai/download/): DeepSeek has free official apps for Android and iOS. An official Windows app also exists, but it is limited to the China region. There is no official Mac desktop app.
- [DeepSeek V4.1-Flash: Specifications, Pricing and Migration](https://chat-deep.ai/models/deepseek-v4-1-flash/): DeepSeek-V4.1-Flash, released September 10, 2026: architecture, exact specifications, the full price table, native image input, thinking modes and open weights.
- [DeepSeek Responses API Audit: 48 Live Test Results](https://chat-deep.ai/research/deepseek-responses-api-compatibility-audit/): An evidence-led audit of 48 live DeepSeek Responses API model-case results across Flash and Pro, including a separately executed Web Search track.
- [DeepSeek 1M Context Benchmark: Retrieval Accuracy, Latency, and Cost](https://chat-deep.ai/research/deepseek-1m-context-benchmark/): A reproducible DeepSeek V4 benchmark with 288 U.S. primary cases, 36 matched India network-vantage calls, and 20 excluded pilot calls across 32K to approximately 950K prompts.
- [Can DeepSeek Cite Sources Accurately? A Reproducible 48-Question Audit](https://chat-deep.ai/research/deepseek-citation-accuracy-audit/): A reproducible 48-question audit of DeepSeek Search citations, including separate U.S. and India extensions with downloadable data and claim-level scoring.
- [DeepSeek Reliability: Monitoring Methodology & Data Coverage](https://chat-deep.ai/research/deepseek-reliability-report/): This is a methodology and data-coverage reference, not a live API performance report. It explains how the Chat-Deep.ai DeepSeek reliability project classifies observations, what its public files contain, and which conclusions the available evidence does not support.
- [DeepSeek V2–V3.2: Model History & Release Dates](https://chat-deep.ai/models/deepseek-model-history/): Last reviewed: July 29, 2026. This is a historical reference to the DeepSeek model line from V2 through V3.2. It explains what each generation introduced, when important checkpoints were released, and how open-weight releases differed from the hosted DeepSeek API at that point in time. For current model selection, use the DeepSeek Models hub or the current API guide.
- [DeepSeek Model Names Explained: Product Labels, API IDs, and Checkpoints](https://chat-deep.ai/research/deepseek-model-names/): Use this DeepSeek model-name reference to distinguish current V4 API IDs, product labels, official checkpoints, provider aliases, and retired historical names. Last verified: September 23, 2026.
- [DeepSeek Integrations: Apps, Automation Platforms, APIs, and AI Frameworks](https://chat-deep.ai/integrations/): DeepSeek integrations connect DeepSeek models to apps, automation platforms, developer tools, data sources, and AI frameworks. The connection usually runs through the DeepSeek API, a platform connector, a webhook, an automation workflow, or a custom backend—not through a native account connection inside DeepSeek Chat.
- [Is DeepSeek Open Source? And Does That Make It Safer?](https://chat-deep.ai/models/is-deepseek-open-source/): Last updated: May 2026
- [DeepSeek R1-0528: Benchmarks, Specs & API Status](https://chat-deep.ai/models/deepseek-r1-0528/): DeepSeek R1-0528 is a May 2025 reasoning checkpoint with improved benchmarks and an 8B distill. Review its specs, weights, local use, and historical API status. R1-0528 sources and checkpoint guidance last reviewed: July 28, 2026. Current hosted API catalog rechecked: September 24, 2026.
- [Editorial Policy](https://chat-deep.ai/editorial-policy/): Last reviewed: September 5, 2026Last updated: September 23, 2026Reviewed by: Chat-Deep.ai Editorial TeamPublisher and operator: Thinkly For Digital BusinessEditorial contact: info@chat-deep.ai
- [DeepSeek OCR: Complete Guide to Optical Context Compression, Setup, Benchmarks, and OCR 2](https://chat-deep.ai/models/deepseek-ocr/): DeepSeek-OCR and OCR 2 are open-weight document-recognition models for text, layouts, PDFs, and visual token compression. Review setup, benchmarks, and API options. OCR model, benchmark, and provider details last verified: July 28, 2026. DeepSeek hosted-API status rechecked: September 24, 2026.
- [DeepSeek V4 Explained: Models, Specs & API Pricing](https://chat-deep.ai/models/deepseek-v4/): DeepSeek V4 is a model family, not one unchanged model. As of September 24, 2026, the official API catalog lists DeepSeek-V4-Pro-0813 and DeepSeek-V4.1-Flash. V4-Pro remains available; V4.1-Flash replaced the original V4-Flash hosted model.
- [DeepSeek Research Papers, Reports & Reading Guide](https://chat-deep.ai/research/): Explore official DeepSeek papers, technical reports, and model cards through a verified research timeline covering MoE, reasoning, agents, OCR, and V4. Research timeline verified: July 28, 2026; current API releases and Harness track rechecked: August 24, 2026.
- [DeepSeek Models](https://chat-deep.ai/models/): Last verified against DeepSeek’s current Models & Pricing page, changelog, September 10 release note, and Vision guide: September 24, 2026; official Hugging Face model cards for the V4.1, V4, V3.x, R1, R1 Distill, Coder-V2-Lite and OCR-2 releases (licenses and weight sizes): September 19, 2026; other model cards: September 3, 2026. No authenticated GET /models rerun was made for this editorial update; the catalog below follows currently published first-party documentation.
- [Is DeepSeek Down Right Now?](https://chat-deep.ai/status/): This is independent monitoring from our server (one location, a probe of DeepSeek’s API gateway about every five minutes, 289 probes in the last 24 hours). It can differ from DeepSeek’s own status page, and it cannot see problems limited to other networks or to your account. For DeepSeek’s own announcements, open the official DeepSeek status page.
- [DeepSeek API Cost Calculator](https://chat-deep.ai/pricing/deepseek-api-cost-calculator/): Use this free DeepSeek API cost calculator to estimate spend per request, day, month, or year for deepseek-flash (DeepSeek-V4.1-Flash) and deepseek-v4-pro. Enter cache-hit and cache-miss input, output tokens, request volume, and—when sending images to V4.1-Flash—image dimensions and count. For the complete rate table and model-selection guidance, see our DeepSeek API pricing guide.
- [DeepSeek R1: Open Reasoning Model Guide](https://chat-deep.ai/models/deepseek-r1/): DeepSeek R1 is an open-weight reasoning model family with full and distilled checkpoints. Compare its architecture, benchmarks, local use, and current API status. R1 sources and checkpoint guidance last verified: July 28, 2026. Current hosted API catalog rechecked: September 24, 2026.
- [Security](https://chat-deep.ai/security/): Last reviewed: September 23, 2026
- [Disclaimer](https://chat-deep.ai/disclaimer/): Effective Date: July 12, 2026Last Updated: September 23, 2026
- [Cookie Policy](https://chat-deep.ai/cookie-policy/): Last updated: September 23, 2026
- [Contact Chat-Deep.ai](https://chat-deep.ai/contact/): For editorial questions, factual corrections, source suggestions, privacy requests, or problems with this website, contact us by email or use the form below.
- [Pricing](https://chat-deep.ai/pricing/): Last verified: September 24, 2026 against DeepSeek’s official Models & Pricing page, Help Center, website and change log. Prices are in US dollars; input means uncached (cache-miss) input.
- [Chat-Deep.ai Browser Chat: Independent DeepSeek API Tool](https://chat-deep.ai/deepseek-chat/): Chat with DeepSeek AI in your browser for free, with no account and no sign-up. Choose Fast for quick answers or Pro when you want it to reason through math, logic, or code first. Attach up to four images per message, and keep your conversations saved in this browser only.
- [App](https://chat-deep.ai/app/): Use this independent guide to reach the official DeepSeek app listings for iPhone, iPad and Android, verify the publisher and app identifier, and avoid lookalike downloads. Store availability, compatibility and labels can vary by country, device and date.
- [FAQ](https://chat-deep.ai/faq/): Updated: September 23, 2026. Answers about our independent publication, the guides and tests we publish, official DeepSeek services, privacy, and the free Chat-Deep.ai browser chat.
- [Terms of Service](https://chat-deep.ai/terms/): Effective Date: September 23, 2026Last Verified: September 23, 2026
- [Privacy Policy](https://chat-deep.ai/privacy-policy/): Effective date: July 14, 2026 · Last updated: September 19, 2026
- [About Us](https://chat-deep.ai/about/): Updated: September 23, 2026 · Editorial contact: info@chat-deep.ai
- [DeepSeek Coder: Historical Coding Model Family Overview](https://chat-deep.ai/models/deepseek-coder/): Historical evidence reviewed: July 29, 2026 · Hosted API catalog rechecked: September 24, 2026
- [Independent DeepSeek AI Guide](https://chat-deep.ai/): DeepSeek develops AI models that you can use through its official web chat, mobile apps, developer API, and open-weight releases. Chat with DeepSeek free in the browser chat below, or use the verified links to the official login, app, models and API pricing.

## Content Blocks
- [Header Manual Ad — Sitewide](https://chat-deep.ai/ct_content_block/header-manual-ad-sitewide/)