I asked GPT-5, GPT-5 Pro, GPT-5 Thinking, and o3 to analyze my code repository - and found surprising differences in detail, reasoning, and actionable insights that could change how you work.

In GPT-5’s case, its responses are about 45% less likely to contain factual errors than responses made by GPT-4o, according to OpenAI. What Are Some Key Differences Between Gpt-5 And Previous ...

OpenAI launches GPT-5, now the default model in ChatGPT for all users. The update prioritizes factual accuracy, transparent reasoning, and broader accessibility.