DeepSeek Harness v0.2.1-alpha.2: Worktrees & Channel Trap
DeepSeek Harness v0.2.1-alpha.2 is prerelease: Git Worktrees, working_directory, reasoning translate; npm latest stays 0.2.0-rc.2, both mode gone.
Tutorial
Browse all Tutorial articles on DeepSeek V4 Pro: API guides, model updates, and technical deep-dives for developers.
DeepSeek OpenCode Setup: /connect, Version Gate, Flash
DeepSeek OpenCode setup: upgrade to ≥v1.18.30, /connect → deepseek → API key → DeepSeek-V4-Flash; vs Codex, Copilot, Harness.
DeepSeek GitHub Copilot Setup: Chat Extension and CLI
DeepSeek GitHub Copilot setup: install the Chat extension into the model picker, or wire Copilot CLI with Anthropic BYOK—and avoid the reasoning_content 400.
DeepSeek API Function Calling: tools vs JSON Output
DeepSeek API Function Calling: tools loop, strict mode, and when to use JSON Output (response_format). Examples on deepseek-flash and common pitfalls.
How to Send Images with the DeepSeek API: Use deepseek-flash
How to send images with the DeepSeek API: use deepseek-flash, not Vision-Exp. Three methods (URL / base64 / Files API), size limits, and common 400s.
DeepSeek API Peak Hours: Weekends, Holidays, Makeup Days
DeepSeek API peak windows on weekdays; weekends and Chinese public holidays stay off-peak all day. Don’t bill makeup Saturdays as peak.
DeepSeek Responses API: How to Call It vs Chat
How to call DeepSeek Responses API: client.responses.create, streaming without DONE, stateless traps, and when to keep Chat Completions.
DeepSeek API Context Caching: Prefix Hits & Cost Control
DeepSeek API disk context cache is on by default. Prefix hit rules, prompt_cache_hit_tokens, and putting a stable prefix first to cut input cost.
DeepSeek API 429 Rate Limits: Concurrency, user_id & Retries
When DeepSeek API returns HTTP 429: account concurrency caps, why extra API keys do not help, user_id isolation, plus expansion and backoff retry tips.
DeepSeek Thinking Mode: Toggle, reasoning_effort & Tools 400
Thinking is on by default for DeepSeek V4. Learn how to toggle it, set reasoning_effort, handle reasoning_content, and avoid HTTP 400 when calling tools.
What Is DeepSeek V4 Pro? Flash vs Pro, Web vs API
DeepSeek V4 Pro is the flagship ID deepseek-v4-pro, not a new site and not Flash. 1M context, free web trial, API peak pricing after 17 Aug, and how to pick.
DeepSeek Codex Setup: One-Click Script, Flash vs Pro
Wire DeepSeek into Codex via Responses API—official script, config.toml, Flash vs Pro, and peak-pricing cost tips for CLI, desktop, and VS Code.
What is DeepSeek Harness? Open-Source Agent Runtime and API Setup
DeepSeek Harness is the August 2026 open-source agent runtime, not a new model. How it differs from the web app, V4 Pro and API, plus npx setup.
DeepSeek Translation: EN↔ZH and Localization Workflows
DeepSeek V4 translation guide: turn source text into deliverable translations, glossaries and notes. Web steps, prompts, Pro/Flash and API batches.
DeepSeek PPT Guide: Outlines and Stage-Ready Scripts
DeepSeek V4 PPT guide: turn sources into slide outlines, talking points and speaker scripts. Web steps, reusable prompts, Pro/Flash and API batches.
DeepSeek Competitive Analysis: Sources to Matrix
DeepSeek V4 competitive-analysis guide: turn sites, pricing and reviews into matrices and briefs. Web steps, prompts, Pro/Flash choices, API monitoring.
DeepSeek Business Email: Draft to Sendable Messages
DeepSeek V4 business-email guide: turn drafts into clear subjects, tone and asks. Web-app steps, reusable prompts, Pro/Flash choices, API follow-up.
DeepSeek Meeting Minutes: Transcripts to Action Items
DeepSeek V4 meeting-minutes guide: turn transcripts into decisions, action tables and weekly briefs. Web steps, prompts, Pro/Flash, API workflows.
DeepSeek Excel Analysis: Spreadsheets to Insights
DeepSeek V4 Excel guide: clean tables, pivots, conclusions and charts. Web-app steps, reusable prompts, Pro/Flash choices, weekly API workflows.
DeepSeek Long-Document Analysis with 1M Context
DeepSeek V4 long-document guide with million-token context: web-app steps, reusable prompts, Pro/Flash choices, and API batch workflows.
2026 DeepSeek Guide: Free Web Chat, API Key and V4
Start with DeepSeek: free DeepSeek web chat, API Key setup, deepseek-v4-pro vs deepseek-v4-flash, 1M context, OpenAI-compatible integration, and FAQ.
DeepSeek Open-Sources Deep Code: Free AI Coding Assistant
Deep Code, a free terminal AI coding assistant tuned for V4, is listed in official API docs. Pricing vs Cursor and Claude Code, plus a 3-step quick start.
DeepSeek V4 Productivity: 10 Ways to Double Efficiency
10 AI productivity scenarios for office work — meeting notes, reports, competitor analysis, knowledge base. Use the DeepSeek web app today.
10 Prompt Templates to Make DeepSeek-V4 Your Coding Partner
10 copy-paste coding prompts: refactor, debug, unit tests — save ~40% coding time.
Build a Production Chatbot with DeepSeek API
Step-by-step: streaming, context management, function calling, RAG — with runnable code.