# GPT-5.5 Pro: Product update

GPT-5.5 Pro: Product update. First seen 15 Sep 2026 Catalogues list a 1,050,000 tokens context window. 9 evidence links.

- Kind: Sighting
- Developer: OpenAI
- Confidence: Confirmed
- First seen: 2026-09-15T02:37:38.666Z
- Model: [GPT-5.5 Pro](https://alexgetman.com/models/openai/gpt-5-5-pro/)
- Canonical: https://alexgetman.com/signals/2026/09/15/gpt-5-5-pro/

## Evidence links

- [VoxelBench · leaderboard](https://voxelbench.ai/leaderboard)
- [OpenCode · discovery](https://opencode.ai/data/openai/gpt-5-5-pro)
- [Artificial Analysis · benchmarks](https://artificialanalysis.ai/models)
- [OpenRouter](https://openrouter.ai/openai/gpt-5.5-pro)
- [OpenRouter](https://openrouter.ai/openai/gpt-5.5-pro:batch)
- [Vercel AI Gateway](https://vercel.com/ai-gateway)
- [OpenAI · pricing](https://developers.openai.com/api/docs/pricing)
- [models.dev · catalogue](https://models.dev/#gpt-5-5-pro)
- [models.dev · catalogue](https://models.dev/#gpt-5.5-pro)