128k context is not a limit of the model, that's a limit of implementation:

"Context Length: 262,144 natively and extensible up to 1,000,000 tokens."

https://huggingface.co/Qwen/Qwen3.8-27B

We're talking about the Cerebras implementation, which is limited to 128K.

It's in the link.

TPM means Tokens per Minute.

GP is referring to GGP’s last paragraph. 150k t/m, yes, and 128k context.