GPT-5.5 Instant
Major release: A new general-purpose AI model from a leading lab, the kind behind ChatGPT, Claude or Gemini: a new flagship or generation.
Key facts
- Released
- May 5, 2026
- What it does
- Text and chat: Writes, answers questions and holds a conversation.
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- How
- For developers, through an API
- Announced as
- “GPT‑5.5 Instant: smarter, clearer, and more personalized”
From trckr's archive of releases before it started watching. Date and details from Epoch AI's database of AI models (CC BY 4.0).
How it scores
From independent testers, never the lab's own claims.
- Chat answers, by people's votes#37 of 86
- Gemini 4 Carbon1,527
- 2Gemini 4 Argon1,522
- 36Claude Opus 4.51,474
- 37GPT-5.5 Instant1,473
- 38Gemini 3 Flash1,473
Source: LMArena · LMArena text, adjusted for style
Compare GPT-5.5 Instant with
It came out 12 days after GPT-5.5 Pro, the lab's previous model.
The details
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