@mattpocockuk: Feels like categorising models got harder recently I used to put models in the bucket of Opus-like, Sonnet-like, or Hai…

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Summary

Matt Pocock observes that categorizing AI models has become harder with new model names like Fable and shifting performance tiers, and asks the community how they evaluate models.

Feels like categorising models got harder recently I used to put models in the bucket of Opus-like, Sonnet-like, or Haiku-like. But now we have Fable. Now Sonnet 5 behaves like Opus. Is GLM 5.2 Opus-like, or Sonnet 5-like? So, I'm asking. How are you evaluating models?
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Cached at: 07/03/26, 02:37 PM

Feels like categorising models got harder recently

I used to put models in the bucket of Opus-like, Sonnet-like, or Haiku-like.

But now we have Fable. Now Sonnet 5 behaves like Opus. Is GLM 5.2 Opus-like, or Sonnet 5-like?

So, I’m asking. How are you evaluating models?

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