> I believe this report has confused Opus (which is known to be around 5T) and Fable.
5T for Opus feels quite high though. DeepSeek V4 Pro is a mere 1.6T and often described as a match with Opus in overall quality. Even the largest open models in common use are around 2.8T.
It's not an Opus match.
The difference is very visible in long tail applications. Exactly where you'd expect parameter count to matter.
> and often described as a match with Opus in overall quality
It's not. Idk about who has more T's but, unfortunately, DS4 pro is not a match to Opus, at least not Opus 4.8.