Anthropic

Claude Sonnet 5.5

Name: Claude Sonnet 5.5
Brand: RelaySwitch
SKU: claude-sonnet-5-5
Availability: InStock

40% under Anthropic's list price on input and 70% on output

Claude Sonnet 5.5 by Anthropic through the RelaySwitch API: $1.20 per million input tokens, $3.00 per million output tokens. Pay with USDT, USDC, Alipay, WeChat Pay. No KYC.

Input / M$1.20Anthropic list: $2.00

Cached input / M$0.075per million tokens

Output / M$3.00Anthropic list: $10.00

Specs

Model id: claude-sonnet-5-5
Developer: Anthropic
Context window: 1M tokens
Max output: 128K tokens
Input: text, image
Released: 2026-09-28

Call it

bash

1curl https://app.relayswitch.io/v1/chat/completions \

2 -H "Authorization: Bearer $RELAYSWITCH_KEY" \

3 -H "Content-Type: application/json" \

4 -d '{

5 "model": "claude-sonnet-5-5",

6 "messages": [{"role": "user", "content": "Hello"}]

7 }'

Any OpenAI SDK works: set the base URL to https://app.relayswitch.io/v1 and the model to claude-sonnet-5-5. Get a key.

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FAQ

Claude Sonnet 5.5: questions

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Specs

Call it

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