ChatGPT’s default model is now more direct, more clear, and less wrong about things

• ChatGPT is now using GPT-5.5 Instant as its deafult model.
• Compared to GPT-5.3 Instant, OpenAI promises tighter replies and fewer hallucinations.
• ChatGPT is also learning to share where it’s pulling context from with memory sources.

With so many different AI options available to us, it’s understandable to feel a bit overwhelmed by choice. Beyond just picking between Gemini, OpenAI, Anthropic, and the rest, there’s usually also the question of which of their many models you want to use. Fast? Thinking? Pro? If all this is too much, and you tend to just go with the default, we’ve got some good news for you, as OpenAI updates ChatGPT so that its default model is now clearer and more correct.

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