GPT-4.1 Released: Benchmarks, Performance, and How to Safely Migrate to Production

GPT-4.1, recently released by OpenAI, is a significant update aimed at developers, offering improvements in coding, instruction following, and long-context handling. It introduces three variants—GPT-4.1, GPT-4.1 Mini, and GPT-4.1 Nano—each catering to different use cases and price points, with a notable feature being the ability to handle a context window of up to 1 million tokens. This API-only release, offering lower pricing than its predecessor GPT-4o, is designed for developer workflows and has undergone extensive real-world testing. The model excels in coding performance, as evidenced by benchmarks such as SWE-bench and internal tests by coding tools like Windsurf. Additionally, it outperforms previous versions in instruction compliance and long-context tasks. OpenAI plans to phase out GPT-4.5 in favor of GPT-4.1, which is also now accessible via ChatGPT.