GPT-5.1
OpenAILanguage modeling/generationQuestion answering
GPT-5.1 is language modeling/generation model published by OpenAI in 2025.
About GPT-5.1
"Today we’re upgrading the GPT‑5 series with the release of:
GPT‑5.1 Instant: our most-used model, now warmer, more intelligent, and better at following your instructions.
GPT‑5.1 Thinking: our advanced reasoning model, now easier to understand and
LLM pricing & performance
Full LLM page →GPT-5.1 is available via API — live cost, context, and benchmark data:
Input / 1M
$1.10
Output / 1M
$9.00
Context
400K
Tokens/sec
—
LiveBench: 72.6SWE-bench Verified: 66.0LMArena (Chatbot Arena) Elo: 1441.3
Details
- Provider
- OpenAI
- Task
- Language modeling/generation,Question answering
- Released
- 2025-11-13
- Open weights
- No