Model · Multimodal language model
GPT-4.1 nano
The fastest, cheapest GPT-4.1 variant for instruction following and tool calling with a 1M-token context window and no reasoning step, exposed as the gpt-4.1-nano alias over the gpt-4.1-nano-2025-04-14 snapshot through OpenAI's managed developer API, without downloadable model weights.
- Developer
- OpenAI
- Distribution
- Developer API
- Artifact licensing
- Proprietary access
- License scope
- Reviewed release artifacts and mandatory terms; not an assessment of training code or training data openness.
- Licenses
- OpenAI Services Agreement
- Boundary
- This record represents the GPT-4.1 Nano release whose API page identifies gpt-4.1-nano-2025-04-14 as the fixed snapshot behind the gpt-4.1-nano alias; OpenAI's deprecation page lists that snapshot for shutdown on 2026-10-23 with gpt-5.6-luna as the substitute model. ChatGPT, the GPT-4.1 and GPT-4.1 Mini siblings, later GPT releases, fine-tuned derivatives, and the OpenAI API platform itself are separate service, application, or model boundaries.
Risk statements
The developer publishes no risk-threshold statement for this release. Absence is not evidence of safety.
Page the reviewer checked ↗ · 2026-10-09 · Research confidence: High
Open in the directory → Open official model page ↗
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