GPT-5 Search API

by OpenAI

GPT-5 Search API is a variant of GPT-5 equipped with web search, letting the model retrieve and reason over live information from the internet. It supports agentic search, where the model actively decides when and what to search, and deep research modes for in-depth, multi-source investigations. With a 272k token context window and web search tool access, GPT-5 Search API excels at tasks that need current information, research synthesis, fact-checking, and reasoning over real-world events and data. Web search does not support minimal reasoning mode, and very low reasoning effort may produce lower-quality results. The model supports tool use, making it suitable for applications that combine language understanding with dynamic web intelligence. It is a good fit for news analysis, research synthesis, knowledge work, and agentic workflows that require up-to-date information.

Key info

Input
Output
Features
Context window
272K
Max output
128K
Input price
$1.25 /1M
Output price
$10.00 /1M
  • US residency available
  • Zero data retention via Enterprise
  • No training by default
  • GDPR DPA available

Available routes

GPT-5 Search API runs on 1 route through the Opper gateway. Compare residency, ZDR, and training posture at a glance β€” full data-handling detail per route below.

ProviderRegionZero data retentionTrainingInputOutput
OpenAIUSEnterpriseNo$1.25$10.00

Training posture across routes: No training on prompts by default.

Data handling per route

Each route hosting GPT-5 Search API has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

OpenAI β€” United StatesπŸ‡ΊπŸ‡Έ

Zero data retention is available via Opper Enterprise contract. No training on customer data. US; SCCs; DPA available.

Zero data retention
Available via Opper Enterprise contract.
Training
No training on customer data.
Logging
Abuse monitoring (30-day retention)
Third-party access
None disclosed
GDPR DPA
DPA available
Transfer mechanism
SCCs

Get started

Call GPT-5 Search API through the Opper gateway with one API key. Let your coding agent set it up, or call it directly β€” Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.

Set it up with your agent

Copy this and paste it into your coding agent β€” Claude Code, Cursor, Codex, and more β€” and it'll wire up Opper for you.

Or call it directly

import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.OPPER_API_KEY,
baseURL: "https://api.opper.ai/v3/compat",
});
const completion = await client.chat.completions.create({
model: "openai/gpt-5-search-api",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

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GPT-5 Search API by OpenAI β€” pricing, benchmarks | Opper AI