Use Claude code execution with Claude Haiku 5.5

by AnthropicCode execution

Claude Haiku 5.5 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 Haiku 5.5

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-haiku-5-5", "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 Haiku 5.5 runs Claude code execution on the routes below.

Provider	Region	Zero data retention	Training	Input	Output	Cache read
Anthropic	US		No	$0.10	$0.50	$0.01$0.13 write

The model

Claude Haiku 5.5

Claude Haiku 5.5 is Anthropic’s fast, low-cost model for high-volume summaries, classification, customer support, and scoped agent tasks.

Available on

AnthropicUSAWS BedrockEUAzureGoogle Cloud

Pricing from$0.10/ 1M input$0.50/ 1M output$0.01/ 1M cache read1Mcontext

Privacy

ZDR
Training: No
Region: US, EU, Multi

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