#モデル切り替え articles

Using OpenAI with Claude Code | Codex Integration and Model Switching

Answers to the 'openai claude code' search query, all in one place. Claude Code is made by Anthropic, not OpenAI, but ways to combine the two have expanded significantly in 2026. We explain three routes — OpenAI's official Codex Plugin for Claude Code, running Claude Code on OpenAI models via claude-code-proxy, and the OpenAI SDK compatibility layer — with setup commands and environment variables drawn from primary sources.

How to Use GPT with Claude Code | LiteLLM & Router Configuration