GPT-4.1 - An API-only Model For Coding

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OpenAI has launched their latest flagship models - GPT-4.1 Nano, GPT-4.1 Mini, and GPT-4.1. These models outperform GPT-4o and GPT-4o Mini. These are the first set of models that support a 1 million context window.

GPT‑4.1 scores 54.6% on SWE-bench Verified, improving by 21.4% over GPT‑4o and 26.6% over GPT‑4.5—making it a leading model for coding.

GPT-4.1 is already available for free in coding assistants like Github Copilot and Windsurf.

The models also show gains in real-world tasks like frontend development, with evaluators preferring 4.1's web interfaces 80% of the time over GPT-4o.

The GPT‑4.1 family is exceptionally strong at image understanding, with GPT‑4.1 mini, in particular, representing a significant leap forward, often beating GPT‑4o on image benchmarks.

It is also rumoured that these models might be the precursor to OpenAI’s latest project, Agentic Software Engineer.

GPT‑4.1 is 26% less expensive than GPT‑4o for median queries, and GPT‑4.1 nano is OpenAI’s cheapest and fastest model ever. Long context requests are now offered at no additional cost beyond the standard per-token costs.

Here’s the official launch video:

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