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openai/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. It features a 1M+ token contex...

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128K max outputVision
Input $5.00/M · Output $30.00/M · Cache read $0.50/M
OutputReady

Your response will appear here

Choose an example or write a prompt, then click Run.

API details and access

Model Details

ProviderOpenAI
TypeLlm
Model IDopenai/gpt-5.5

Capabilities

InputTextImage
OutputText
Context-
Max Output128,000
VisionSupported
Function CallingSupported

Access details

Responses API
Base URLhttps://api.sandbase.ai
API Endpoint/v1/responses
{
  "model": "openai/gpt-5.5",
  "instructions": "You are a helpful assistant.",
  "input": "Hello",
  "max_output_tokens": 512
}

Pricing

Input$5.00 / 1M tokens
Output$30.00 / 1M tokens
Cache read$0.50 / 1M tokens

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