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OpenAI introduced GPT-5.3 Codex, a new model aimed at developer and coding workflows. This is a catalog update to track availability and future pricing / API behavior changes based on the official announcement.
teams evaluating new coding models and agentic developer workflows.
validate output quality, tool-use behavior, and safety constraints on your repo; confirm pricing/limits before production rollout.
this entry links to the official announcement and will be updated when pricing, limits, or API behavior changes are verified.
Run an evaluation on your codebase: generation, refactor, and tool-use behavior. Compare against your current baseline model.
Confirm pricing, usage limits, and availability in your target region before enabling in production.
Official announcement: GPT-5.3 Codex is introduced as a new model for coding workflows.
Check your models and usage for free. See the relevant official changes, estimated cost, and a practical next step.