Claude Sonnet 5.5 has its own web search on 1 of its 6 routes, and auto uses it when you call it on the Messages endpoint. On every other route and endpoint Opper's engine runs the search.
Paste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.
curl https://api.opper.ai/v3/compat/v1/messages \-H "Authorization: Bearer $OPPER_API_KEY" \-H "Content-Type: application/json" \-d '{"model": "anthropic/claude-sonnet-5-5", "max_tokens": 1024,"messages": [{"role": "user", "content": "What changed in the news today?"}],"tools": [{"type": "opper:web_search", "engine": "native"}]}'
Claude Sonnet 5.5 runs Claude web search on the routes below.
| Provider | Region | Zero data retention | Training | Input | Output | Cache read |
|---|---|---|---|---|---|---|
| US | No | $2.00 | $10.00 | $0.20$2.50 write |
Claude Sonnet 5.5 is Anthropic's fast model for scoped coding, bug fixing, agent work, and polished documents, with adaptive thinking and a one million token context window.
Step-by-step setup for Claude web search on each of these models through Opper.
Opper's default search engine for models without their own. Search processing stays in the EU.
"engine": "jina"
The Swedish open-source search API, on Europe's own Staan index and hosted in the EU.
"engine": "searchbase"
Exa's search engine built for AI, on any tool-calling model through one tool entry. US-based.
"engine": "exa"