OpenAINew page: GPT-5.2 Codex
GPT-5.2-Codex: Product update. First seen 27 Sep 2026 Catalogues list a 400,000 tokens context window. 8 evidence links.
Facts as of
- Context window
- 400,000
- Max output
- 128,000
- Input
- text · image
- Output
- text
Alex's take
Alex has not commented on this signal yet. When Alex posts about a signal, the post appears here and on the home page beside it.
Evidence links 8
- Arena · leaderboardsevidence linkopenai.com
- OpenCode · discoveryevidence linkopencode.ai
- OpenAI · docs · discoveryevidence linkplatform.openai.com
- OpenRouterevidence linkopenrouter.ai
- Artificial Analysis · benchmarksevidence linkartificialanalysis.ai
- models.dev · catalogueevidence linkmodels.dev
- OpenAI · model indexevidence linkdevelopers.openai.com
- OpenAI · deprecationsevidence linkplatform.openai.com