Anthropic

Claude Sonnet 5

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

Claude Sonnet 5 by Anthropic through the RelaySwitch API: $1.20 per million input tokens, $3.00 per million output tokens. Pay by card or crypto (Card, Apple Pay, PayPal, USDT, USDC, BTC, ETH, SOL). No KYC.

Input / M$1.20Anthropic list: $2.00
Cached input / M$0.12Anthropic list: $0.20
Output / M$3.00Anthropic list: $10.00

Specs

Model id
claude-sonnet-5
Developer
Anthropic
Context window
1M tokens
Max output
128K tokens
Input
text, image
Released
2026-06-30

Call it

bash
1curl https://api.relayswitch.io/v1/chat/completions \
2 -H "Authorization: Bearer $RELAYSWITCH_KEY" \
3 -H "Content-Type: application/json" \
4 -d '{
5 "model": "claude-sonnet-5",
6 "messages": [{"role": "user", "content": "Hello"}]
7 }'

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

More from Anthropic

FAQs

Claude Sonnet 5: questions

Payment, keys and billing in short.

Open the console

A key in under a minute

Get a key

Or email hello@relayswitch.io

Run Claude Sonnet 5 today

Top up by card or crypto and send "claude-sonnet-5".

See every priceGet a key