Skip to main content

​
Web Search

This page only documents Web Search flows that were verified with real requests against Crazyrouter production. Verification date:
  • 2026-03-22
Verified models:
  • gpt-5.4
  • claude-sonnet-4-6
  • gemini-3-pro-preview

​
Verified matrix

ModelProtocolEndpointSuccess marker
gpt-5.4OpenAI ResponsesPOST /v1/responsesoutput includes web_search_call
claude-sonnet-4-6OpenAI-compatible ChatPOST /v1/chat/completionsReturns remote_web_search tool call
gemini-3-pro-previewGemini NativePOST /v1beta/models/{model}:generateContentReturns groundingMetadata

​
GPT-5.4

curl https://crazyrouter.com/v1/responses \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "gpt-5.4",
    "input": "Use web search to find one current headline from a major technology news site published recently.",
    "tools": [
      {
        "type": "web_search_preview"
      }
    ]
  }'
Verified output types: 
["web_search_call", "web_search_call", "message"]

​
Claude Sonnet 4.6

curl https://crazyrouter.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "claude-sonnet-4-6",
    "messages": [
      {
        "role": "user",
        "content": "Find one recent technology headline. Use web search and do not answer from memory."
      }
    ],
    "web_search_options": {
      "search_context_size": "medium",
      "user_location": {
        "approximate": {
          "timezone": "Asia/Shanghai",
          "country": "CN"
        }
      }
    },
    "max_tokens": 200
  }'
Verified response shape: 
{
  "tool_calls": [
    {
      "type": "function",
      "function": {
        "name": "remote_web_search"
      }
    }
  ],
  "finish_reason": "tool_calls"
}
For first-pass validation, explicitly tell Claude to use web search and not answer from memory. With weaker prompts, it may answer directly without surfacing the tool call.

​
Gemini 3 Pro Preview

curl "https://crazyrouter.com/v1beta/models/gemini-3-pro-preview:generateContent?key=YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "contents": [
      {
        "role": "user",
        "parts": [
          {
            "text": "Use Google Search to find one recent headline from a major technology news site."
          }
        ]
      }
    ],
    "tools": [
      {
        "googleSearch": {}
      }
    ]
  }'
Verified production fields:
  • groundingMetadata.webSearchQueries
  • groundingMetadata.groundingChunks
  • groundingMetadata.groundingSupports

​
See Also