GPT-5 Thinking in ChatGPT is shockingly good at search and demonstrates the potential of combining tool calling with chain-of-thought reasoning (Simon Willison/Simon Willison's Weblog)

Simon Willison / Simon Willison's Weblog:
GPT-5 Thinking in ChatGPT is shockingly good at search and demonstrates the potential of combining tool calling with chain-of-thought reasoning  —  “Don't use chatbots as search engines” was great advice for several years... until it wasn't.  —  I wrote about how good OpenAI's o3 was at using …

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