GPT-5 Nano
Summary
GPT-5 Nano is a proprietary language model from OpenAI, released on 7 Aug 2025. It accepts text and images and generates text, with a 400K-token context window and up to 128K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.05 per million input tokens and $0.40 per million output tokens (OpenAI API), across 6 providers we track.
Tiny GPT-5 lane for routing, extraction, classification, and bulk jobs
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | OpenAI |
|---|---|
| Release date | 7 Aug 2025 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 400K (400,000 tokens) [models.dev] |
| Max output | 128K tokens [models.dev] |
| Knowledge cutoff | 30 May 2024 [models.dev] |
| Input | Text and images [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | Yes [models.dev] |
| Tool calling | Yes [models.dev] |
| Structured output | Yes [models.dev] |
GPT-5 Nano API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| OpenAI API gpt-5-nano | $0.05 | $0.40 | $0.005 | 400K | models.dev, 4 Oct 2026 |
| Databricks databricks-gpt-5-nano | $0.05 | $0.40 | $0.005 | 400K | models.dev, 4 Oct 2026 |
| Azure AI Foundry gpt-5-nano | $0.05 | $0.40 | $0.01 | 400K | models.dev, 4 Oct 2026 |
| Vercel AI Gateway openai/gpt-5-nano | $0.05 | $0.40 | $0.005 | 400K | models.dev, 4 Oct 2026 |
| OpenRouter openai/gpt-5-nano | $0.05 | $0.40 | $0.005 | 400K | OpenRouter, 4 Oct 2026 |
| Snowflake Cortex openai-gpt-5-nano | – | – | – | 272K | models.dev, 4 Oct 2026 |
Frequently asked questions
What is the context window of GPT-5 Nano?
GPT-5 Nano has a context window of 400,000 tokens (400K) and can generate up to 128,000 tokens in a single response, according to models.dev.
How much does the GPT-5 Nano API cost?
Through OpenAI API, GPT-5 Nano costs $0.05 per million input tokens and $0.40 per million output tokens. Prices last verified 4 Oct 2026.
Is GPT-5 Nano open source?
No. GPT-5 Nano is a proprietary model; OpenAI has not released its weights. It is available through APIs including OpenAI API, Databricks, Azure AI Foundry, Vercel AI Gateway.
When was GPT-5 Nano released?
OpenAI released GPT-5 Nano on 7 Aug 2025, according to models.dev.
Which providers offer GPT-5 Nano?
We track GPT-5 Nano on 6 providers: OpenAI API, Databricks, Azure AI Foundry, Vercel AI Gateway, OpenRouter, Snowflake Cortex.
Change history
No changes detected since we started tracking this model. We re-check every source daily.
Sources
- https://github.com/sst/models.dev/blob/dev/providers/openai/models/gpt-5-nano.toml
- https://github.com/sst/models.dev/blob/dev/providers/databricks/models/databricks-gpt-5-nano.toml
- https://github.com/sst/models.dev/blob/dev/providers/azure/models/gpt-5-nano.toml
- https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/gpt-5-nano.toml
- https://openrouter.ai/openai/gpt-5-nano
- https://github.com/sst/models.dev/blob/dev/providers/snowflake-cortex/models/openai-gpt-5-nano.toml