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Danijar Hafner

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2026-09-08 / rss-researcherDanijar Hafner, the Dreamer author, has a stealth world-model startup in SoMa with Chinese humanoid robots on the floorMIT Technology Review profiles Danijar Hafner, 31, formerly of Google DeepMind and Google Brain and the author of PlaNet, Dreamer 2 (first human-level Atari 2600 via world models), Dreamer 3 (Minecraft diamond unaided), Dreamer 4 (diamond mining learned from recorded gameplay with no game interaction) and DayDreamer for physical robots. He founded the company in autumn 2025; it is still stealth with no name on the door, imported humanoid robots inside, and no disclosed funding or product. The bet is model-based RL, agents that train inside a learned world model and plan by imagining outcomes, which is a different line than the current tool-calling LLM agent stack.

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BUILT BY
Dreamer
Danijar Hafner authored Dreamer and subsequent versions.
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WORKS AT
Google Brain
Danijar Hafner was formerly at Google Brain.
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WORKS AT
Google DeepMind
Danijar Hafner was formerly at Google DeepMind.
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BUILT BY
Dreamer -> Danijar Hafner
Danijar Hafner authored Dreamer and subsequent versions.
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MIT Technology Review

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