OpenAI web search

by OpenAIWeb search

OpenAI web search is the built-in tool that lets OpenAI models search the web while they answer. Answers carry inline citations with each source's URL and title, a sources list shows every page the model consulted, and filters take up to 100 allowed or blocked domains. On Opper, opper:web_search on auto uses it when you call OpenAI models on the Responses endpoint, and Opper's own engine everywhere else. Pin "engine": "native" to require it, or pin Jina or SearchBase to keep searches in the EU instead. It runs on 13 routes in the catalogue today.

UseOpenAI web searchwithin

Add OpenAI web search on Opper

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

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Key info

Endpoint

Responses

Region

Provider

Pin it with

"engine": "native"

Index

Bing

Native routes

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-6.1-sol",
5       "input": "What changed in the news today?",
6       "tools": [{"type": "opper:web_search", "engine": "native"}]}'

Use OpenAI web search with these models

Step-by-step setup for OpenAI web search on each of these models through Opper.

GPT-6.1 Sol GPT-6 Sol GPT-6 Luna GPT-5.6 Sol GPT-5.6 Terra GPT-5.6 Luna GPT-5.5 GPT-5.4 Mini See all 700+ models

More tools on Opper

Jina search

Opper's default search engine for models without their own. Search processing stays in the EU.

Search"engine": "jina"

SearchBase

The Swedish open-source search API, on Europe's own Staan index and hosted in the EU.

Search"engine": "searchbase"

Exa search

Exa's search engine built for AI, on any tool-calling model through one tool entry. US-based.

Search"engine": "exa"