GPT-4.1 and GPT-4.1 mini are now available in ChatGPT

AI models don't always need to be groundbreaking to make a difference. Sometimes, quiet changes in speed, structure, and focus can shape the way we work

GPT-4.1 and GPT-4.1 mini, previously released by OpenAI in April via its API, are now rolling out to ChatGPT users, marking a silent yet significant shift in the chat service's capabilities.

The models, which drew attention for their arrival without the usual technical or safety report from OpenAI, are designed for performance, particularly in coding and instruction-following, areas where OpenAI claims GPT-4.1 shows "huge gains."

Now, reaching a wider user base, GPT-4.1 arrives to Plus, Team, and Enterprise subscribers, while GPT-4.1 mini will take the place of GPT-4.0 mini as the fallback for both free and paid tiers. This brings a more powerful and efficient text model into daily use, with improvements in consistency, speed, and prompt handling to be expected.

GPT-4.1 is also noted for its 1 million-token context window, nearly eight times that of GPT-4-turbo (often referred to informally as GPT-4.5), which is described by OpenAI as having 128,000 tokens. This allows for processing larger documents, longer conversations, and tasks like codebase analysis with fewer interruptions.

While early benchmarks like 54.6% on the SWE-bench Verified for GPT-4.1 in its strengths are noted, and users may notice trade-offs in tone or conversational nuance compared to previous versions. As part of this, GPT-4.0 mini has been retired, and OpenAI plans to fully phase out GPT-4-turbo by July 2025, from its API, to simplify its model lineup.