Use Claude code execution with Claude Sonnet 5

by AnthropicCode execution

Claude Sonnet 5 uses Claude code execution through Opper on the Messages endpoint, passed through as Anthropic defines it. It runs on Anthropic's own route, not on Bedrock or Vertex.

UseClaude code executionwithin

Add Claude code execution to Claude Sonnet 5

Set up with agents

Paste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.

Get your API key

In your code

1curl https://api.opper.ai/v3/compat/v1/messages \
2  -H "Authorization: Bearer $OPPER_API_KEY" \
3  -H "Content-Type: application/json" \
4  -d '{"model": "anthropic/claude-sonnet-5", "max_tokens": 1024,
5       "messages": [{"role": "user", "content": "Sum the first 50 primes and show your working."}],
6       "tools": [{"type": "code_execution_20260521", "name": "code_execution"}]}'

Where you can run it

Claude Sonnet 5 runs Claude code execution on the routes below.

Provider	Region	Zero data retention	Training	Input	Output	Cache read
Anthropic	US		No	$2.00	$10.00	$0.20$2.50 write

The model

Claude Sonnet 5

Claude Sonnet 5 is Anthropic's balanced production model, bringing near-Opus agentic coding and tool use to a 1M token context window.

Available on

AnthropicUSAWS BedrockEUAzureGoogle Cloud

Pricing from$2.00/ 1M input$10.00/ 1M output$0.20/ 1M cache read1Mcontext

Privacy

ZDR
Training: No
Region: US, EU, Multi

Use Claude code execution with other models

Step-by-step setup for Claude code execution on each of these models through Opper.

Claude Haiku 5.5 Claude Sonnet 5.5 Claude Opus 5.5 Claude Fable 5.1 Claude Opus 5 Claude Fable 5 Claude Opus 4.8 See all 700+ models

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