OpenAI: GPT-5 Search API
GPT-5 Search API is a language model from OpenAI released on Oct 14, 2025. It reads text, images and files and writes text, with a 272K token context window and up to 128K tokens per reply.
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It costs $1.25 per million input tokens and $10 per million output tokens.
It supports tool calling and structured JSON output.
2 providers serve it, including Eden AI and Merge Gateway.
- Modalities
- In / out price
- $1.25 / $10 per 1M
- Context
- 272K
- Max output
- 128K
- Released
- Oct 14, 2025
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
GPT-5 Search API pricing
USD, as listed on Oct 20, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $1.25 / 1M tokens | |
|---|---|---|
| Output | $10 / 1M tokens |
GPT-5 Search API providers
2 providers serve it, including Eden AI and Merge Gateway. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Eden AI | $1.25 | $10 | $0.125 | 272K | 100K |
| Merge Gateway | $1.25 | $10 | n/a | 272K | 128K |
What GPT-5 Search API costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call GPT-5 Search API through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs
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GPT-5 Search API questions
How much does the GPT-5 Search API API cost?
$1.25 per million input tokens and $10 per million output tokens. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of GPT-5 Search API?
272,000 tokens of input, and it can write up to 128,000 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve GPT-5 Search API?
2 providers serve it, including Eden AI and Merge Gateway. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does GPT-5 Search API support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is GPT-5 Search API open source?
No. OpenAI serves it through an API only, so you cannot download the weights or host it yourself.
When was GPT-5 Search API released?
Oct 14, 2025.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 20, 2026. The summary is written from these facts.