GPT-5.1 Instant
MultimodalGPT-5.1 Instant is the next iteration of GPT-5, designed for more conversational interaction. The model features improved instruction following and adaptive reasoning that allows it to decide when to think before responding. GPT-5.1 Instant offers clearer and more engaging interactions, reducing jargon and improving user comprehension. It demonstrates significant improvements in coding tasks.
Key Specifications
Parameters
-
Context
256.0K
Release Date
November 11, 2025
Average Score
77.9%
Timeline
Key dates in the model's history
Announcement
November 11, 2025
Today
September 10, 2026
Technical Specifications
Parameters
-
Training Tokens
-
Knowledge Cutoff
-
Family
-
Capabilities
MultimodalZeroEval
Pricing & Availability
Input (per 1M tokens)
$1.25
Output (per 1M tokens)
$10.00
Max Input Tokens
256.0K
Max Output Tokens
32.0K
Supported Features
Function CallingStructured OutputCode ExecutionWeb SearchBatch InferenceFine-tuning
Benchmark Results
Model performance metrics across various tests and benchmarks
Programming
Programming skills tests
SWE-Bench Verified
GPT-5.1 with adaptive reasoning - SWE-Bench Verified. • Self-reported
Reasoning
Logical reasoning and analysis
GPQA
GPT-5.1 - GPQA Diamond (no tools). • Self-reported
Multimodal
Working with images and visual data
MMMU
GPT-5.1 with adaptive reasoning - College-level visual problem-solving with multimodal reasoning. • Self-reported
Other Tests
Specialized benchmarks
TAU2 Telecom
GPT-5.1 with adaptive reasoning - Function calling benchmark (telecom domain). • Self-reported
AIME 2025
GPT-5.1 with adaptive reasoning (no tools) - AIME 2025 competition mathematics. • Self-reported
BrowseComp Long Context 128k
GPT-5.1 with adaptive reasoning - BrowseComp long-context 128k variant. • Self-reported
FrontierMath
GPT-5.1 with adaptive reasoning (with Python tool) - FrontierMath Tier 1-3 expert-level mathematics. • Self-reported
Tau2 Airline
GPT-5.1 with adaptive reasoning - Function calling benchmark (airline domain). • Self-reported
Tau2 Retail
GPT-5.1 with adaptive reasoning - Function calling benchmark (retail domain). • Self-reported
License & Metadata
License
proprietary
Announcement Date
November 11, 2025
Last Updated
November 11, 2025
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