GPT‑4.1, GPT‑4.1 mini, and GPT‑4.1 nano are available now to all developers.

Through efficiency improvements to our inference systems, we’ve been able to offer lower prices on the GPT‑4.1 series. GPT‑4.1 is 26% less expensive than GPT‑4o for median queries, and GPT‑4.1 nano is our cheapest and fastest model ever. For queries that repeatedly pass the same context, we are increasing the prompt caching discount to 75% (up from 50% previously) for these new models. Finally, we offer long context requests at no additional cost beyond the standard per-token costs.