Use OpenAI web search with GPT-5.5

by OpenAIWeb search

GPT-5.5 has its own web search on 1 of its 2 routes, and auto uses it when you call it on the Responses endpoint. On every other route and endpoint Opper's engine runs the search.

UseOpenAI web searchwithin

Add OpenAI web search 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": "What changed in the news today?",
6       "tools": [{"type": "opper:web_search", "engine": "native"}]}'

Where you can run it

GPT-5.5 runs OpenAI web search 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.