Did you see any person claiming an open model was more intelligent than Fable 5?
It's always some sort of "I don't notice the difference".
And honestly, if you don't see a difference between the SOTA from 6 months ago, which would be GPT 5.4, and today's Opus 5.5, you would have to be downright blind. Not sure what else to say - the results are obviously different for any kind of meaningful output.
> Also how do we know how much of these “big improvements” come from the harness and tooling rather than the raw capability of the model?
By simply running the old models in the latest harness. Which none of the people who argue "it's all the harness" ever do.
It's always some sort of "I don't notice the difference".
And honestly, if you don't see a difference between the SOTA from 6 months ago, which would be GPT 5.4, and today's Opus 5.5, you would have to be downright blind. Not sure what else to say - the results are obviously different for any kind of meaningful output.
> Also how do we know how much of these “big improvements” come from the harness and tooling rather than the raw capability of the model?
By simply running the old models in the latest harness. Which none of the people who argue "it's all the harness" ever do.