DeepSeek Publishes Official Claude Code Integration Guide

What we verified on June 23, 2026

• DeepSeek now has an official Claude Code integration page inside the agent-integrations section of the API docs.
• The official environment contract is concrete: DeepSeek publishes ANTHROPIC_BASE_URL=https://api.deepseek.com/anthropic, uses deepseek-v4-pro[1m] for the main Claude route, keeps deepseek-v4-flash on the lighter lane, and exposes CLAUDE_CODE_EFFORT_LEVEL=max.
• DeepSeek explicitly says Web Search is natively supported in Claude Code and that search-triggered summarization creates additional model-token cost.
• The same page publishes a model-mapping rule for Claude-style names: claude-opus* maps to DeepSeek V4 Pro, while claude-haiku* and claude-sonnet* map to DeepSeek V4 Flash.
• DeepSeek also says this mapping can help with the new Claude Desktop app's developer-mode model-name restrictions, which turns a community workaround pattern into a partially official routing story.

Sources

• DeepSeek English homepage
• DeepSeek official Claude Code integration guide
• DeepSeek official GitHub Copilot integration guide
• DeepSeek official GitHub Copilot CLI integration guide
• DeepSeek official status page
• DeepSeek official X account surface