GPT-5.5
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks.
Input
Output
Context
1050K
Max Output
128K
Parameters
—
Technical Specifications
Model TypeChat
Context Window1.1M
Max Output Tokens128K
Parameters—
Training Cutoff—
License—
Capabilities
Input Modalities
fileimagetext
Output Modalities
text
Features
code_generationfunction_callingjson_modereasoningstreamingtext_generationvision
Benchmarks
44.3%
HLE
93.5%
GPQA
56.1%
SciCode
59.1
Coding
60.2
Intelligence
77.7
Speed (tok/s)
27.1
TTFA (s)
27.1
TTFT (s)
Resources & Links
Related Tools
Data sourced from official provider APIs and documentation
Last updated: May 5, 2026
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