OpenAI: GPT-4.1

GPT-4.1 is OpenAI’s flagship large language model, built for advanced instruction following, long-context reasoning, and real-world software engineering. With support for a 1 million-token context window, it surpasses GPT-4o and GPT-4.5 in performance—achieving 54.6% on SWE-bench Verified for coding, 87.4% on IFEval for instruction compliance, and strong results on multimodal benchmarks. The model is fine-tuned for accurate code diffs, reliable agent behavior, and high recall in large-scale document analysis, making it especially effective for agents, IDE integration, and enterprise knowledge retrieval.