Felix Rieseberg @felixrieseberg · 01 Sep 2026
Today, we're releasing Fable 5.1 and Mythos 5.1. While the model is getting slightly better at a lot of things, I expect many users to appreciate that Fable 5.1 solves agentic coding tasks at roughly half the cost of Fable 5. I personally also really like it's writing style, https://t.co/YbuXdjrBsd
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