by OpenAI

OpenAI: GPT-4.1 Nano.

multimodal closed 1M ctx
Cheapest input
$0.1/M
on OpenAI API
Cheapest output
$0.4/M
on OpenAI API
Fastest
78 tok/s
on OpenRouter
Hosted equiv.
~$0.14/hr
@ 100 tok/s on OpenAI API

For tasks that demand low latency, GPT‑4.1 nano is the fastest and cheapest model in the GPT-4.1 series. It delivers exceptional performance at a small size with its 1 million...

Hosted API only

No self-host path — closed weights.

OpenAI: GPT-4.1 Nano's weights aren't published. Use it via the access providers below.

Where to use it

Cheapest hosted endpoints.

Provider Access $/M in $/M out
OpenAI API api direct $0.1 $0.4 Launch ↗
OpenRouter api aggregator $0.1 $0.4 Launch ↗
Performance

Speed across providers.

Tokens/sec and time-to-first-token measured against the same prompt template on each provider's API.

Provider Tokens/sec TTFT Total
OpenRouter 78.4 785 ms 1467 ms
FAQ

Frequently asked.

How do I run OpenAI: GPT-4.1 Nano?
OpenAI: GPT-4.1 Nano is a closed-source API model. The cheapest way to access it is through the API providers listed on this page (direct API, aggregators, and hosted chat UIs).
Where can I access OpenAI: GPT-4.1 Nano?
OpenAI: GPT-4.1 Nano is available via OpenAI API, OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run OpenAI: GPT-4.1 Nano?
API pricing starts at $0.1/M input tokens and $0.4/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is OpenAI: GPT-4.1 Nano open-source or proprietary?
OpenAI: GPT-4.1 Nano is a proprietary model from OpenAI. Access is API-only — there are no public weights to download.