GPT-4.1, a flagship model for advanced instruction following, software engineering, and long-context reasoning. Supports a 1 million token context window and is tuned for precise code diffs, agent reliability, and high recall in large document contexts.
Retired on Feb 24, 2026: requests to this model ID now return an error. These models are live and work with the same API key.
GPT-4.1, a flagship model for advanced instruction following, software engineering, and long-context reasoning. Supports a 1 million token context window and is tuned for precise code diffs, agent reliability, and high recall in large document contexts.
No. GPT-4 (Free) was retired on NagaAI on Feb 24, 2026, and requests to it now return an error. Live models you can use instead with the same API key: GPT-6.1 Terra, GPT-6.1 Sol and LFM3-1.7B.
It takes text and files as input and returns text.
