# GPT-5 nano

GPT-5 nano is an AI model released by OpenAI on Aug 7 2025.

## Facts

| Field | Value |
| --- | --- |
| Model | GPT-5 nano |
| Developer | OpenAI |
| Release date | Thursday, Aug 7 2025 |
| Licensing | Proprietary |

## API pricing

All rates in USD per 1,000,000 tokens, pay-as-you-go.

| Tier | Input | Cached input | Output |
| --- | --- | --- | --- |
| All documented contexts | $0.05 | $0.005 | $0.40 |

Verified August 18, 2026 against the first-party source: https://developers.openai.com/api/docs/models/gpt-5-nano

## Questions and answers

### When was GPT-5 nano released?

GPT-5 nano was released by OpenAI on Thursday, Aug 7 2025.

### Who made GPT-5 nano?

GPT-5 nano was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.

### How much does GPT-5 nano cost?

GPT-5 nano costs $0.05 per million input tokens and $0.40 per million output tokens through the OpenAI API. Cached input is $0.005 per million tokens. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on August 18, 2026.

### Is GPT-5 nano open source?

No. GPT-5 nano is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

### What came before and after GPT-5 nano?

OpenAI's previous tracked release was GPT-5 mini on Aug 7 2025. It was followed by GPT-5 Pro on Aug 7 2025.


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Canonical page: https://aireleasetracker.com/model/openai/gpt-5-nano
Full dataset: https://aireleasetracker.com/llms-full.txt · JSON: https://aireleasetracker.com/models.json
Source: AI Release Tracker (https://aireleasetracker.com). Benchmark scores are the figures published by the releasing lab at launch.