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Claude Sonnet 5.5

anthropic/claude-sonnet-5-5

Anthropic model · Served by Anthropic · live on the gateway

Try in chatGet API key
Input / 1M
$2.00
Output / 1M
$10.00
Context
1M tokens
Max output
128K tokens
Input
Text, Image, Pdf
Released
18d ago

Pricing

Input tokens$2.00 per 1M
Output tokens$10.00 per 1M
Provider list priceExactly what your balance is debited; our fee is charged when you buy credits

About Claude Sonnet 5.5

Fast Claude model for everyday coding, agents, and knowledge work

VisionReasoningTools

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": "anthropic/claude-sonnet-5-5",
    "messages": [{ "role": "user", "content": "Hello" }]
  }'

Frequently asked

How do I call Claude Sonnet 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 anthropic/claude-sonnet-5-5. The chat completions endpoint is https://rapidrouter.ai/api/v1/chat/completions.

What is the context window of Claude Sonnet 5.5?

Claude Sonnet 5.5 has a context window of 1,000,000 tokens on Rapid Router, and returns up to 128,000 output tokens per reply.

What can Claude Sonnet 5.5 do?

On Rapid Router, Claude Sonnet 5.5 supports tool calling, JSON mode, image input, extended reasoning.

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