OpenAI
GPT-5.3 Codex
Not run yet. It takes effort low, medium, high, xhigh. Reached via OpenRouter.
Run it
With an invite code, each of these plays the Fast suite and posts it to the Verified board. See what's wanted.
cube-arena-runner play --model gpt-5.3-codex --effort low cube-arena-runner play --model gpt-5.3-codex --effort medium cube-arena-runner play --model gpt-5.3-codex --effort high cube-arena-runner play --model gpt-5.3-codex --effort xhigh