Source page: https://www.o10.io/models/openai-gpt-5-nano

Plain-text reference for reading, copying, and citation. Examples are illustrative; use your own credentials for API requests.

Model data: https://www.o10.io/api/models.json
Content index: https://www.o10.io/llms.txt
Prices are dated references, not live quotes. Check the current endpoint rate before use.

# GPT-5 nano. Price, context, and routing

GPT-5 nano costs $0.050/1M input tokens and $0.400/1M output tokens as of 2026-06-27. OpenAI publishes this model with a 400K tokens context window. o10 lists GPT-5 nano on OpenRouter at routing band C0. API slug openai-gpt-5-nano. Verify list prices against the venue you call.

## Key takeaways

### What is GPT-5 nano?

GPT-5 nano is a chat model from openai (slug: openai-gpt-5-nano). Pick GPT-5 nano for the cheapest OpenAI GPT-5 class calls. Use it for classification, extract, and short replies. Published input pricing starts at $0.050/1M tokens. Context window: 400K tokens.

*Catalog snapshot 2026-06-27.*

### When should you pick GPT-5 nano?

Pick GPT-5 nano for the cheapest OpenAI GPT-5 class calls. Use it for classification, extract, and short replies. GPT-5 nano is below GPT-5 mini. Escalate to mini or full GPT-5 when the task needs longer reasoning.

### How does GPT-5 nano differ from sibling models?

GPT-5 nano is below GPT-5 mini. Escalate to mini or full GPT-5 when the task needs longer reasoning.

### How much does GPT-5 nano cost per million tokens?

GPT-5 nano costs $0.050/1M input tokens and $0.400/1M output tokens in the gateway catalog snapshot (2026-06-27). Endpoint pricing may differ by fulfillment host.

*Sourced from gateway catalog snapshot.*

### Where can you run GPT-5 nano?

GPT-5 nano is configured on OpenRouter. Known host IDs: openrouter: openrouter/openai/gpt-5-nano. This model is routable through o10 eval-gated routing.

### What is GPT-5 nano's context window?

GPT-5 nano supports a 400K tokens context window in the gateway catalog snapshot. Context limits may vary by fulfillment host endpoint.

### What o10 routing band is GPT-5 nano?

GPT-5 nano is classified at o10 routing band C0. Bands group models by cost tier and eval profile: C0 (economy), C1 (standard), C2 (capable), C3/C4 (frontier). Production routing is enabled for this slug.

### Who makes GPT-5 nano?

GPT-5 nano is attributed to source provider openai in the o10 catalog. Fulfillment hosts (OpenRouter) supply API access; list pricing may differ by venue.

## Citation
GPT-5 nano costs $0.050/1M input tokens and $0.400/1M output tokens as of 2026-06-27. OpenAI publishes this model with a 400K tokens context window. o10 lists GPT-5 nano on OpenRouter at routing band C0. API slug openai-gpt-5-nano. Verify list prices against the venue you call.
## Methodology

Fulfillment catalog 2026-06-27. Gateway pricing joined where slug match exists.

## FAQ

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

GPT-5 nano costs $0.050/1M input tokens and $0.400/1M output tokens in the gateway snapshot (2026-06-27). Verify against your provider's published pricing.

### What is GPT-5 nano's context window?

GPT-5 nano supports 400K tokens in the gateway catalog snapshot. Host-specific endpoints may differ.

### Which hosts serve GPT-5 nano?

GPT-5 nano (openai-gpt-5-nano) is configured on: OpenRouter. Upstream model IDs are listed in the fulfillment routes section.

### Is GPT-5 nano routable through o10?

Yes. GPT-5 nano is routable at band C0. Send model: "openai-gpt-5-nano" or use an o10 smart routing alias.

### How do I call GPT-5 nano via o10?

Use o10 slug "openai-gpt-5-nano" or gateway ID "openai/gpt-5-nano" depending on your integration. Gateway-compatible endpoints accept OpenAI-style /v1 requests.

### How does o10 route this model?

o10 routes GPT-5 nano only when per-use-case evals clear at your quality floor. Band C0 indicates cost tier. See /kyi for governance and /models/routing for smart aliases.

### What is the API model ID for GPT-5 nano?

The o10 slug is "openai-gpt-5-nano"; the unified gateway ID is "openai/gpt-5-nano". Host IDs: openrouter: openrouter/openai/gpt-5-nano. Pricing snapshot date: 2026-06-27.

### Who hosts GPT-5 nano?

GPT-5 nano is hosted as openrouter: openrouter/openai/gpt-5-nano. o10 maps those upstream IDs to slug "openai-gpt-5-nano".

## Related links

- [GPT-5 nano HTML](https://www.o10.io/models/openai-gpt-5-nano)
- [GPT-5 nano pricing](https://www.o10.io/pricing/openai/openai-gpt-5-nano)
- [Model catalog](https://www.o10.io/models)
- [llms-models.txt](https://www.o10.io/llms-models.txt)

## Source URL

https://www.o10.io/models/openai-gpt-5-nano