Use OpenAI code interpreter with GPT-5.5

GPT-5.5 uses OpenAI code interpreter through Opper on the Responses endpoint, passed through as OpenAI defines it.

UseOpenAI code interpreterwithin

Add OpenAI code interpreter to GPT-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/responses \
2  -H "Authorization: Bearer $OPPER_API_KEY" \
3  -H "Content-Type: application/json" \
4  -d '{"model": "openai/gpt-5.5",
5       "input": "Sum the first 50 primes and show your working.",
6       "tools": [{"type": "code_interpreter", "container": {"type": "auto"}}]}'

Where you can run it

GPT-5.5 runs OpenAI code interpreter on the routes below. Its route also sells flex and priority processing: the same model at another price, picked per request with service_tier. How service tiers work.

Provider	Region	Zero data retention	Training	Input	Output	Cache read
OpenAI	US		No	$5.00	$30.00	$0.50

The model

GPT-5.5

by OpenAI

GPT-5.5 is OpenAI's newest frontier model, combining strong coding, reasoning, and web search and understanding multi-part tasks, with a 1M context window and vision.