GPT-5 Pro

OpenAI's general-purpose reasoning model with a 400k token context window, released in August 2025 before its GPT-5.5 successor.

Strengths

Handles a broad range of tasks across reasoning, coding, and multimodal understanding with a large context window.

Best for

General-purpose applications that need balanced capability across multiple domains without specialization constraints.

Limitations

Superseded by newer models like GPT-5.5, and lacks the specialization of task-specific variants like GPT-5 Codex for coding or o3 Deep Research for complex analysis.