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GPT-4.1

OpenAI introduces GPT-4.1 in the API, emphasizing coding gains, instruction following, and up to 1M-token context.

Model Release

What Happened

OpenAI launched GPT-4.1 as a new API-focused model family (including mini and nano variants), marketed around stronger coding, better instruction following, and improved long-context usage.

Why It Matters

GPT-4.1 made “million-token context windows” a first-class narrative for general-purpose developer models, and reframed frontier progress as a balance of quality, latency, and practical agent performance.

Technical Details