Key Specifications
Parameters
-
Context
1.1M
Release Date
April 23, 2026
Average Score
60.5%
Timeline
Key dates in the model's history
Announcement
April 23, 2026
Today
August 29, 2026
Technical Specifications
Parameters
-
Training Tokens
-
Knowledge Cutoff
December 1, 2025
Family
-
Capabilities
MultimodalZeroEval
Pricing & Availability
Input (per 1M tokens)
$30.00
Output (per 1M tokens)
$180.00
Max Input Tokens
1.1M
Max Output Tokens
128.0K
Supported Features
Function CallingStructured OutputCode ExecutionWeb SearchBatch InferenceFine-tuning
Benchmark Results
Model performance metrics across various tests and benchmarks
Other Tests
Specialized benchmarks
BrowseComp
GPT-5.5 Pro - BrowseComp. • Self-reported
FrontierMath
GPT-5.5 Pro - FrontierMath Tier 4. • Self-reported
GDPval-MM
GPT-5.5 Pro - GDPval (wins or ties). • Self-reported
GeneBench
GPT-5.5 Pro - GeneBench. • Self-reported
Humanity's Last Exam
GPT-5.5 Pro - Humanity's Last Exam (with tools). • Self-reported
License & Metadata
License
proprietary
Announcement Date
April 23, 2026
Last Updated
August 29, 2026
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