Anthropic's launch of Claude Fable 5 gives developers two distinct tiers of frontier model to work with, but choosing between them isn't as simple as picking the newer one.

Fable 5 is meaningfully more capable on complex, long-running tasks, but at roughly twice the price of Opus 4.8, the decision comes down to what you're actually building.

Claude Fable 5 vs Opus 4.8

Here are the key differences between both of the models:

Claude Fable 5 and Opus 4.8 benchmark gap

It is Fable 5, which shows a........

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