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> even the best of software engineers are unable to keep up with these models.

It’s more likely they used an earlier version of Claude to write v1, then a later version of Claude rewrote it.

Unless Anthropic engineers were writing code by hand prior to Mythos

There actually was lot more hand-writing of the code back then! Or, at least, only moderately assisted by Claude with a lot of human-still-typing-things-in-an-editor. The ability to delegate larger chunks of code to Claude had a noticeable, step function increase with Mythos Preview.

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