Claude Code, Codex CLI, Gemini CLI: 2026 Terminal AI Coding Agents Compared

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A 2026 review compared three AI coding agents for terminal use: Claude Code from Anthropic, Codex CLI from OpenAI, and Gemini CLI from Google. The agents were tested over two weeks on 50 coding tasks within a TypeScript project. Claude Code was rated most capable for complex, multi-file work, while Codex CLI was fastest for quick tasks. Gemini CLI, offering a generous free tier, was noted as the best budget option.

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