GPT-5.1
GPT-5.1 is a reasoning model created by OpenAI. It is served by OpenAI API.
Self-hostableNo
Reasoning TierBasic
Max Tokens272K in / 128K out
Training Cutoff2024-12
Release Date2025-08-07
SkateBench Score91.43%
GPT-5.1 Tokenizer
Token count: 0
GPT-5.1 Pricing
$0.00
Input: $0.00·Output: $0.00