David Ha
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David Ha is the co-founder and CEO of Sakana AI, a Tokyo-based AI research lab, and also serves as Head of Strategy at Stability AI. Before founding Sakana AI, he was a researcher at Google Brain, where he worked on generative models, neuroevolution, and creative applications of machine learning, including the Sketch-RNN and World Models projects. Earlier in his career he worked in finance at Goldman Sachs before moving into machine learning research. He is widely known in the ML community under the online handle 'hardmaru' for his writing and open-source work on topics like evolution strategies, JAX-based tools, and collective intelligence in deep learning. Sakana AI under his leadership has drawn attention for research combining evolutionary algorithms with foundation models, including a widely discussed incident involving overstated results in an AI-generated CUDA optimization paper.
Updated 5 August 2026
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