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GPT-5.1
GPT-5.1
OpenAI · Frontier tier
GPT-5.1
O
OpenAI
frontier
Release Date: Nov 13, 2025
1458
Arena Elo
88.1
GPQA
96
HumanEval
91.5
MMLU
62
SWE-bench
Try GPT-5.1
Specifications
Context Window
400K tokens
Max Output
128K tokens
Input Price
$1.25 per million
Output Price
$10 per million
Release Date
November 13, 2025
Tier
Frontier
Capabilities
vision
tool-use
code
reasoning
agentic
Benchmarks
Arena Elo
1458
MMLU
91.5
GPQA
88.1
HumanEval
96
SWE-bench
62
Cost Estimate
Input Tokens
500K
Output Tokens
100K
Estimated Cost
$1.6250
Input: $0.6250
Output: $1.0000
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Compare With
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GPT-5.1 vs Claude Sonnet 4.6