GitHub Model Selection Guide: Choosing Claude vs Codex for GitHub Coding Agents
GitHub now lets you pick your AI model when kicking off a coding agent task. Claude Sonnet 4.6, Claude Opus 4.6, GPT-5.2-Codex, and GPT-5.4 are all available — and which one you choose has a direct impact on code quality, task completion rate, and your monthly bill. This guide cuts through the noise with benchmarks, cost data, and a concrete decision framework so you can stop guessing and start shipping. ...