/AI5h ago

Anthropic's Mythos Preview model achieves a 52x speedup on an internal ML training code optimization benchmark

By comparison, skilled human developers average a 4x speedup.

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Anthropic@AnthropicAI

Each time we release a model, we run the same test: give it code that trains a small AI model, ask the new model to speed it up. It takes a skilled human 4-8 hours to reach 4x faster.

In May 2024, Claude Opus 4 averaged a ~3x speedup. This April, Mythos Preview achieved ~52x.

9:15 AM · Jun 4, 2026 · 327.5K Views
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VIEWS10.5KBOOKMARKS10LIKES45RETWEETS1REPLIES1
Prakash@8teAPi

Mythos achieved a 52x speedup!

Anthropic@AnthropicAI

Each time we release a model, we run the same test: give it code that trains a small AI model, ask the new model to speed it up. It takes a skilled human 4-8 hours to reach 4x faster.

In May 2024, Claude Opus 4 averaged a ~3x speedup. This April, Mythos Preview achieved ~52x.

3hViews 10.5KLikes 45Bookmarks 10
Anthropic's Mythos Preview model achieves a 52x speedup on an internal ML training code optimization benchmark · Digg