GPT-5.5
by OpenAItext+image+file->text7 endpoints
Neura Intelligence Index
72.0/ 100
Rank
#70—
Confidence
highBenchmarks
10(26% coverage)
Overview
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. It features a 1M+ token...
Capabilities
Text generation
Image understanding
Tool use / Function calling
Structured output
Extended reasoning
Prompt caching
Long context
File input
Deterministic seed
Modalities
Input
FileImageText
Output
Text
Technical Specifications
Context Window
1.1M tokens
Max Output
128K tokens
Knowledge Cutoff
2025-12-01
Tokenizer
GPT
Content Moderation
Enabled
Uptime (24h)
10000.0%
Country
🇺🇸US
Release Date
April 23, 20264mo
Supported Parameters
include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools
Benchmark Performance
general
| Benchmark | Score | Source |
|---|---|---|
| MRCR v2 | 74 | verified |
coding
| Benchmark | Score | Source |
|---|---|---|
| SWE-Bench Pro | 58.6 | verified |
math
| Benchmark | Score | Source |
|---|---|---|
| FrontierMath | 35.4 | verified |
reasoning
| Benchmark | Score | Source |
|---|---|---|
| GPQA Diamond | 93.6 | verified |
| ARC-AGI v2 | 85 | verified |
| Humanity's Last Exam | 52.2 | verified |
multimodal
| Benchmark | Score | Source |
|---|---|---|
| MMMU-Pro | 83.2 | verified |
agent
| Benchmark | Score | Source |
|---|---|---|
| BrowseComp | 84.4 | verified |
| MCP Atlas | 75.3 | verified |
| Toolathlon | 55.6 | verified |
Performance Over Time
Pricing
Per 1M tokens
Input$5.00
Output$30.00
Cache read$0.50
Added
April 24, 2026
Last synced 9/17/2026