CoAI

Alternatives to OpenAI Codex

AI tools you can use instead of OpenAI Codex for the same purpose.

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CodingAI agents

An AI-first code editor that accelerates development with generation, edits, and agents.

Free plan availableJapanese supportPartialCode generationAgent
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An AI pair programmer integrated into your editor — from completions to agents.

Free plan availableJapanese supportPartialCode generationAgent
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Claude Code is an AI coding service that can be used for implementation and bug fixes.

PaidJapanese supportPartial
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Windsurf

Coding

Windsurf is an AI coding service useful for programming and debugging.

Free plan availableJapanese supportPartialAgent
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