Hi!! @taigofranca !!
Awesome question!
I see that the generative for anthropic has this parameter exposed on client, but not for the generate.aws.
I have checked with our team, and indeed it is missing.
So we could either add it to generative.bedrock or create a new generative.bedrock_anthropic
Issue created: Missing parameters when using anthropic on amazon bedrock · Issue #1520 · weaviate/weaviate-python-client · GitHub
Thanks for pointing it out!