GPT-5 Mini

GPT-5 Mini is OpenAI's lightweight general-purpose model with a 400k token context window, positioned as a smaller and faster variant within the GPT-5 family.

Strengths

Delivers reduced latency and lower computational overhead compared to GPT-5 Pro and GPT-5 Chat, while maintaining the full 400k context window.

Best for

Applications requiring fast inference on general tasks where GPT-5 Nano's extreme speed optimization isn't needed and GPT-5 Chat's 128k context window is insufficient.

Limitations

Positioned between GPT-5 Nano (faster but more constrained) and GPT-5 Chat (larger context but smaller), so it trades off some speed gains for broader capability without the reasoning depth of GPT-5 Pro or specialized models.