Anthropic released Fable 5.1 and Mythos 5.1 on September 1 — the same underlying model behind two different safeguard settings, with Fable generally available and Mythos limited to trusted-access programs.
What it means for your work
The change that shows up on a bill is the cache-read price, which is where long agentic runs spend; Devin's team said it is what finally made a Fable-class model economical for their code review.
Our read on the items that move something. The reporting is everyone's; this part is ours.
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The AI build-out is now the only thing holding up an entire category of construction demand — an opening if you sell into it, a concentration risk if you depend on it.Take data centers out and US nonresidential construction spending sits at a three-year lowThe AI Product & Business Strategy beat · Construction Dive
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A rare adoption account from a company that already survived the hard part once: the constraint was never the machine, it was the process and the people around it.Caterpillar is porting two decades of mining-autonomy lessons into how it deploys AIThe AI Product & Business Strategy beat · TechCrunch
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If you generate or commission audio with a frontier model, the per-work damages maths in this complaint is the number your licensing position now has to survive.Sony Music Publishing and Warner Chappell sue Anthropic over training on tens of thousands of songsThe AI Product & Business Strategy beat · TechCrunch
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Anyone building a learning product now has a reference implementation of the compliance shape regulators are pushing toward: infer the age, degrade the experience automatically, and make the pedagogy (guided questions, not answers) the safety feature rather than a bolt-on filter.