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[ARTICLE · art-120547] src=uk.pcmag.com ↗ pub= topic=artificial-intelligence verified=true sentiment=· neutral

Anthropic Fixed Fable 5.1's Worst Problems...So Why Am I Staying With Opus?

Anthropic's Fable 5.1 model received significant upgrades, but a reviewer remains loyal to the Opus model, citing that despite the improvements, their subscription stays with Opus. The review highlights Fable 5.1's fixes to its worst problems but does not specify the exact issues or the reasons for staying with Opus.

read1 min views6 publishedSep 3, 2026

I put Fable 5.1 through its paces after its big comeback. The upgrades are impressive, but my subscription is staying right where it is.

Fable is perhaps the most intriguing AI model to date. Anthropic positioned it as the world’s most powerful LLM, comparable only with its big sibling, Mythos, which was too powerful for a public release. Then

source & further reading
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