OpenAI API Web Search Guide

Endpoint:  POST https://api.apiyi.com/v1/responses
Tool:      tools: [{"type": "web_search"}]
Models:    gpt-5.5 / gpt-5.4 (verified)

curl https://api.apiyi.com/v1/responses \
  -H "content-type: application/json" \
  -H "authorization: Bearer YOUR_APIYI_KEY" \
  -d '{
    "model": "gpt-5.4",
    "max_output_tokens": 8192,
    "tools": [{"type": "web_search"}],
    "input": "What new models has Anthropic released in the past week? Search and include source links."
  }'

from openai import OpenAI

client = OpenAI(
    api_key="YOUR_APIYI_KEY",         # default group works
    base_url="https://api.apiyi.com/v1",
)

resp = client.responses.create(
    model="gpt-5.4",                  # or gpt-5.5
    max_output_tokens=8192,           # recommend >=8k; gpt-5.5 uses many reasoning tokens, too small -> incomplete
    tools=[{"type": "web_search"}],
    input="What new models has Anthropic released in the past week? Search and include source links.",
)

# 1) Final answer text
print(resp.output_text)

# 2) Actual number of searches in this call (billing basis, see below)
search_calls = [item for item in resp.output if item.type == "web_search_call"]
print(f"Searches in this call: {len(search_calls)}")

# 3) Source citations (structured url_citation)
for item in resp.output:
    if item.type == "message":
        for content in item.content:
            for ann in getattr(content, "annotations", []) or []:
                print(f"Source: {ann.title} | {ann.url}")