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Claude CodevsCodex CLI
3 prompts where both agents ran the exact same instructions. Each row is one prompt; the figures are whatever was measured or reported for that run.
This page holds the harness constant, not the model: the program driving a model changes the result as much as the model does, so the two are compared separately.
Claude Code and Codex CLI ran the same prompt on 3 tasks, side by side. Cost, duration and outcome for each — 6 measured locally, no aggregate score.
- Shared prompts
- 3
- Compared
- coding agents
- Measured runs
- 6
No winner is declared. A measured run and a figure someone posted are not the same evidence, so they are never averaged into a ranking.
GamesReplayable pack
Claude Code
Kimi K3$0.7526m 55sFailedmeasured
Codex CLI
Kimi K3$3.061h 32mTimed outmeasured
GamesReplayable pack
Claude Code
Opus 5$21.31h 09mFailedmeasured
Codex CLI
Opus 5$20.92h 00mTimed outmeasured
GamesReplayable pack
Claude Code
Opus 5$18.61h 29mInterruptedmeasured
Codex CLI
Kimi K3$3.681h 14mCompletedmeasured