Openai
GPT-5.1 Instant
GPT-5.1 Instant (or GPT-5.1 chat) is a warmer and more conversational version of GPT-5-chat, with improved instruction following and adaptive reasoning for deciding when to think before responding.
Introducing GPT-5Model Snapshot
TypeLanguage
ReleaseNov 12, 2025
Context128,000
Tagsfile-input, implicit-caching, tool-use, vision
Overall
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Coding
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Strength Profile
Percentile score by analysis domain.
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Benchmark Percentiles
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Model Details
Runtime
Max Output16,384
Streaming speed is not measured for this model yet.
Pricing
Blended-
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Output-
Catalog$1.25/M in / $10.00/M out
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All Benchmarks
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