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Fable 5: Guardrails and burn rate are annoying users, who say it’s still better than Opus 4.8

calendar_today June 10, 2026 person Meredith Shubel domain the-new-stack

On Tuesday, Anthropic debuted Fable 5, the first — and much-anticipated — generally available Mythos-class model. Anthropic says it can work The post Fable 5: Guardrails and burn rate are annoying users, who say it’s still better than Opus 4.8 appeared first on The New Stack .

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