OpenAI has introduced GPT-4.1, a successor to the GPT-4o multimodal artificial intelligence model launched by the company last year. During a livestream on Monday, OpenAI said GPT-4.1 has an even larger context window and is better than GPT-40 in “just about every dimension,” with big improvements to coding and instruction following.
GPT-4.1 is now available to developers, along with two smaller model versions included in the rollout. There’s a GPT-4.1 Mini model that, like its predecessor, is more affordable for developers to tinker with, as well as GPT-4.1 Nano, an even more lightweight model that OpenAI said is its “smallest, fastest, and cheapest” one yet. All three models can process up to one million tokens of context, which is made up of the text, images, or videos included in a prompt.
The launch comes as OpenAI plans to phase out its two-year-old GPT-4 model from ChatGPT on April 30th, announcing in a changelog that recent upgrades to GPT‑4o make it a “natural successor” to replace it. OpenAI also plans to deprectate the GPT-4.5 preview in the API on July 14th, as “GPT‑4.1 offers improved or similar performance on many key capabilities at much lower cost and latency. ”
OpenAI is also set to debut the full version of its o3 reasoning model and an o4 mini reasoning model any day now, with references having already been spotted in the latest ChatGPT web release by AI engineer Tibor Blaho.