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Input / 1M
$5.00
Output / 1M
$30.00
Context
1.1M tokens
Max output
128K tokens
Input
Text, Image, Pdf
Released
5mo ago
Pricing
Input tokens$5.00 per 1M
Output tokens$30.00 per 1M
Provider list priceExactly what your balance is debited; our fee is charged when you buy credits
About GPT 5.5
Default frontier GPT for coding, computer use, research, and knowledge work
Longest contextVisionReasoningTools
What it supports
- Tool calling (function calling)
- JSON mode and structured output
- Image input (vision)
- Audio input
- Extended reasoning
- Streaming responses
- OpenAI SDK, Anthropic SDK and any OpenAI-compatible client
Make a request
curl https://rapidrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $RAPIDROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "openai/gpt-5.5-2026-04-23",
"messages": [{ "role": "user", "content": "Hello" }]
}'Frequently asked
How do I call GPT 5.5 through an OpenAI-compatible API?
Point any OpenAI-compatible client at https://rapidrouter.ai/api/v1 with a Rapid Router API key and set the model to openai/gpt-5.5-2026-04-23. The chat completions endpoint is https://rapidrouter.ai/api/v1/chat/completions.
What is the context window of GPT 5.5?
GPT 5.5 has a context window of 1,050,000 tokens on Rapid Router, and returns up to 128,000 output tokens per reply.
What can GPT 5.5 do?
On Rapid Router, GPT 5.5 supports tool calling, JSON mode, image input, extended reasoning.