GPT-5.1
GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning to allocate computation dynamically, responding quickly to simple queries while spending more depth on complex tasks. The model produces clearer, more grounded explanations with reduced jargon, making it easier to follow even on technical or multi-step problems.
Input
Output
Context
400K
Max Output
128K
Parameters
—
Technical Specifications
Model TypeChat
Context Window400K
Max Output Tokens128K
Parameters—
Training Cutoff—
Licenseproprietary
Capabilities
Input Modalities
imagetextfile
Output Modalities
text
Features
agenticcode_generationfunction_callingjson_modereasoningstreamingsystem_promptstext_generationtool_usevision
Benchmarks
26.5%
HLE
87.3%
GPQA
43.3%
SciCode
87.0%
MMLU Pro
94.0
Math
44.7
Coding
86.8%
LiveCodeBench
47.7
Intelligence
115
Speed (tok/s)
15.5
TTFA (s)
15.5
TTFT (s)
Resources & Links
proprietary — Proprietary - API access only
Related Tools
Data sourced from official provider APIs and documentation
Last updated: May 5, 2026
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