OpenAI
GPT-5.5 Pro
Highest-accuracy GPT-5.5 tier for slower, precision-heavy reasoning and coding
openai/gpt-5.5-pro
Context
1.1M
Output
128K
Released
2026-04-23
Knowledge cutoff
2025-12-01
Types
InputTextImagePDF
OutputText
Reasoning
Supported
Tool use
Supported
Structured output
Supported
Attachments
Supported
Open weights
—
Provider pricing
Poe
InTextImage
OutTextImage
- Price
- $27.27 / $163.64
- Context
- 400K
- Status
- Stable
Cloudflare AI Gateway
InTextImagePDF
OutText
- Price
- $30.00 / $180.00
- Context
- 1M
- Status
- Stable
CrossModel
InTextImage
OutText
- Price
- $30.00 / $180.00
- Context
- 1.1M
- Status
- Stable
Eden AI
InTextImagePDF
OutText
- Price
- $30.00 / $180.00
- Context
- 1.1M
- Status
- Stable
FastRouter
InTextImagePDF
OutText
- Price
- $30.00 / $180.00
- Context
- 1.1M
- Status
- Stable
Impossibl
InTextImagePDF
OutText
- Price
- $30.00 / $180.00
- Context
- 1.1M
- Status
- Stable
Kilo Gateway
InTextImagePDF
OutText
- Price
- $30.00 / $180.00
- Context
- 1.1M
- Status
- Stable
LLM Gateway
InTextImagePDF
OutText
- Price
- $30.00 / $180.00
- Context
- 1.1M
- Status
- Stable
OpenRouter
InTextImagePDF
OutText
- Price
- $30.00 / $180.00
- Context
- 1.1M
- Status
- Stable
OrcaRouter
InTextImagePDF
OutText
- Price
- $30.00 / $180.00
- Context
- 1.1M
- Status
- Stable
Vercel AI Gateway
InTextImagePDF
OutText
- Price
- $30.00 / $180.00
- Context
- 1M
- Status
- Stable
ZenMux
InTextImagePDF
OutText
- Price
- $30.00 / $180.00
- Context
- 1.1M
- Status
- Stable
AI/ML API
InTextImagePDF
OutText
- Price
- $41.26 / $247.57
- Context
- 1.1M
- Status
- Stable
Benchmarks
BrowseComp
90.1 · accuracy
Humanity's Last Exam
43.1 · accuracy
Humanity's Last Exam
57.2 · accuracy
FrontierMath
52.4 · accuracy
FrontierMath
39.6 · accuracy
GDPval
82.3 · wins or ties
GeneBench
33.2 · accuracy