Lena Park

Lena writes about AI models for robotics — vision-language-action systems, world models, and the data that trains them.

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AI Models

Physical Intelligence quietly open-sources a robot foundation model

Pi has released model weights for π0.5, the first major open-weights foundation model trained specifically on robot demonstration data.

Lena Park · 23 May · 3 min

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AI Models

The world model versus the policy: a debate that is finally getting resolved

A long-running theoretical disagreement inside robotics research is starting to resolve in favour of one side. The implications are bigger than they sound.

Lena Park · 23 May · 3 min

AI Models

Google DeepMind releases a manipulation model trained entirely in simulation

A new model from DeepMind achieves real-world manipulation performance using zero real demonstrations. The sim-to-real gap may be closing.

Lena Park · 4 May · 3 min

AI Models

New hardware, better data pipelines, and architectural improvements have collapsed the cost curve for robot model training.

Lena Park · 1 May · 3 min

The cost of training a robot foundation model has dropped 80 percent in two years