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What changed in AI, what it is useful for, and what you can do with it.

15 September 2026

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Three Years from GPT-3 to Gemini 3: The Move from Chatbots to Agents

A new piece by Ethan Mollick traces three years from GPT-3 to Gemini 3, framing the change as a shift from chatbots to agents. The evidence available here is thin: it gives the title and subtitle but no specific capabilities, prices, or availability.

The source's title and subtitle tell a story of evolution. Over three years, the focus has moved from GPT-3 to Gemini 3. The key phrase is 'from chatbots to agents.' That is the source's framing. It suggests that the practical difference between earlier and later systems is not just better conversation but a change in kind.

What does that mean for someone using AI for everyday work? A chatbot responds to prompts. An agent, by contrast, is typically understood to act on your behalf—taking steps, using tools, and completing tasks with less back-and-forth. But the source, as we have it, does not spell out those capabilities. We are left with the headline and subtitle.

Our interpretation: if the shift is real, the reader question—what can this do that the previous option could not?—points to autonomy. The previous option could answer; the new option might do. That is a meaningful difference for practical work, from research to scheduling to drafting. But without details, we cannot say what specific tasks are supported, what it costs, or when it is available.

The evidence is too thin to offer a full practical explanation. We can note the framing and its implication, but not the mechanics. Readers should treat this as a signal of direction, not a buying guide. The source's own qualifiers are limited to the title and subtitle.

Source details and supporting facts

Each line is stated by the page named above it.

Stated by oneusefulthing.org

  • The article is titled 'Three Years from GPT-3 to Gemini 3'.
  • The article's subtitle is 'From chatbots to agents'.
  • The author is Ethan Mollick.
  • The publisher is One Useful Thing.
  • The date published is 2025-11-18.

Sources

  1. One Useful Thing (Ethan Mollick)Text stored 15 September 2026

How this story was checked. Written from the 1 page listed above, stored 15 September 2026; claims checked against that stored text on 15 September 2026.

What that means
  • 5 of 5 reported statements were confirmed against the page that carries them; the rest were removed rather than published.
  • Figures in the text were required to appear in the stored source text: yes. Identifiers: yes.
  • The check reads stored text only: no claim rests on a fresh look that did not happen.
  • Where the reporting was silent, the text says so instead of filling the gap.

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