[idonotknowwhy]

I love logical posts like this. There are other factors like mxfp4 in gpt-oss, mla in deepseek, etc.

>Amazon Bedrock serves Claude Opus 4.5 at 57.37

I checked the other Opus-4 models on bedrock:

Opus 4 - 18.56tps Opus 4.1 - 19.34tps

So they changed the active parameter count with Opus 4.5

[threeducks]

Good observation!

56.37 tps / 19.34 tps ≈ 2.9

This explains why Opus 4.1 is 3 times the price of Opus 4.5.