GPT-5.1 (2025-11-13)
Version-pinned snapshot of GPT-5.1 from the November 13, 2025 release. Use this when audits or regulated workflows require deterministic behavior.
- Reasoning
- Tool Calling
- Structured Output
Pricing
Auto routing · per 1M tokens- Input
- $1.25
- Output
- $10.00
- Cache read
- $0.13
Specifications
- Context window
- 1M
- Max output
- 32.8K
- Avg output (7d)
- 660 tokens
- Longer than 53% of models
Benchmarks
Benchmarks
Sourced from Artificial Analysis.
Intelligence Index
13.3
Agentic work
T²-Bench Telecom (legacy)
Legacy fallback · Conversational AI agents in dual-control scenarios
46.5%
Better than 50% of models compared
Document reasoning
AA-LCR v1.1
Long context reasoning with updated grading
45.0%
Better than 40% of models compared
Reasoning
HLE
Humanity's Last Exam
5.3%
Better than 32% of models compared
IFBench
Instruction-following benchmark
43.2%
Better than 47% of models compared
CritPt
Research-level physics reasoning
0.0%
Coding
Terminal-Bench Hard (legacy)
Legacy fallback · Agentic coding and terminal use
22.7%
Better than 62% of models compared
LiveCodeBench
Contamination-free coding benchmark
49.4%
Better than 56% of models compared
Math
AIME 2025
American Invitational Mathematics Examination 2025
38.0%
Better than 39% of models compared
Knowledge
MMLU-Pro
Professional and academic subject knowledge
80.1%
Better than 67% of models compared
AA-Omniscience Accuracy
Proportion of correctly answered questions
29.5%
AA-Omniscience Hallucination Rate
Rate of incorrect answers among non-correct responses
90.6%
Legacy benchmarks
GPQA Diamond (legacy)
Graduate-level scientific reasoning
64.3%
Better than 40% of models compared
AA-LCR (unversioned / legacy)
Long context reasoning evaluation
45.0%
Better than 40% of models compared
Last updated Oct 3, 2026
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