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GPT-5.5 Pro

GPTv5.5 ProCurrent
byOpenAIOpenAI(ai lab)
Released April 23, 2026
API DocsPlayground
95
OpenTools Scorenormalized /100
0.9
Valuescore / $M
OpenTools Score
Context1.1M tokens
Price (In / Out)$30.00/M / $180.00/M
Training CutoffDecember 2025
CategoryMultimodal LLM
Max Output128K tokens

About GPT-5.5 Pro

GPT-5.5 Pro uses more compute to think harder and provide consistently better answers than GPT-5.5. Designed for the toughest problems, some requests may take several minutes. It excels at FrontierMath Tier 4 (39.6%) and BrowseComp (90.1%), offering the highest intelligence available from OpenAI at a premium price point.

Capabilities

textvisioncodetool useextended thinkingweb search

Input Modalities

textimagefile

Output Modalities

text

Technical Details

API Identifier
openai/gpt-5.5-pro
Category
Multimodal LLM
Context Window
1,050,000 tokens
Max Output Tokens
128,000 tokens

Tags

reasoningcodingagenticlong-contextmultimodalprotool-use

Benchmarks

Performance scores for GPT-5.5 Pro across standard benchmarks.

FrontierMath Tier 4OpenAI · Apr 2026
39.6%
FrontierMath Tier 1-3OpenAI · Apr 2026
52.4%
HLE (with tools)OpenAI · Apr 2026
57.2%
HLE (no tools)OpenAI · Apr 2026
43.1%
BrowseCompOpenAI · Apr 2026
90.1%
GeneBenchOpenAI · Apr 2026
33.2%
GDPvalOpenAI · Apr 2026
82.3%
Investment Banking ModelingOpenAI · Apr 2026
88.6%

Pricing

Token pricing for GPT-5.5 Pro API usage.

Input Tokens

$30.00/M

per million tokens

Output Tokens

$180.00/M

per million tokens

Pricing Calculator

Input cost$30.00
Output cost$90.00
Estimated monthly cost$120.00

No cached input discount. Long context (>272K tokens): 2x input, 1.5x output. Batch API: 50% discount. Regional processing: 10% uplift.

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