Evaluation

Round by round

Parallel cloud tasksCodex

Codex spins up many isolated sandboxes.

Local terminal workflowClaude Code

Claude Code is built for the CLI on your machine.

Large refactorsClaude Code

Excellent multi-step reasoning on big repos.

IDE and web surfacesCodex

CLI, IDE extension, web and mobile.

Pick Codex if

Teams batching many PRs on ChatGPT plans.

Pick Claude Code if

Developers who want a deep agent in the terminal.