GPT 5.5

gpt-5.5
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads.
Reasoning
Speed
Price
$5.00 • $30.00
Cache Price
$0.50 • $5.00
Input
Output

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Specifications

Context Window
1.1M
Max Output Tokens
128K
Released Date
2026-04-23
Reasoning Token Support
✓

Modalities

Text

Input and output

Image

Input only

Audio

Not supported

Video

Not supported

Endpoints

OpenAI Compatible
Chat Completions
/v1/chat/completions
Responses
/v1/responses
Embeddings
/v1/embeddings
Image Generation
/v1/images/generations
Image Edit
/v1/images/edits
Videos
/v1/videos
Claude Compatible
Messages
/v1/messages
Gemini Compatible
Generate Content
/v1beta/models/{model}:{operator}

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Subscription & Pay-as-you-go
Powerful API Access
High Cost-Effectiveness
Interactive Studio UI
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