GPT-5 Search API
Summary
GPT-5 Search API is a proprietary language model from OpenAI, released on 14 Oct 2025. It accepts text, images and PDFs and generates text, with a 272K-token context window and up to 128K output tokens per response.
GPT-5 model trained for web search in the Chat Completions API
Last verified 21 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | OpenAI |
|---|---|
| Release date | 14 Oct 2025 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 272K (272,000 tokens) [models.dev] |
| Max output | 128K tokens [models.dev] |
| Input | Text, images and PDFs [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | No [models.dev] |
| Tool calling | Yes [models.dev] |
| Structured output | Yes [models.dev] |
GPT-5 Search API API pricing by provider
USD per million tokens. Sorted by input price.
We do not currently track a paid API listing for this model.
Frequently asked questions
What is the context window of GPT-5 Search API?
GPT-5 Search API has a context window of 272,000 tokens (272K) and can generate up to 128,000 tokens in a single response, according to models.dev.
Is GPT-5 Search API open source?
No. GPT-5 Search API is a proprietary model; OpenAI has not released its weights.
When was GPT-5 Search API released?
OpenAI released GPT-5 Search API on 14 Oct 2025, according to models.dev.
Change history
- Added to the directory