OpenAIAnthropicGooglexAIPerplexity
← Back to all updatesPublished ·Anthropic• Minor
Non-default `temperature`, `top_p`, or `top_k` returns a 400 error on Claude Opus 4.8.
The read
Custom sampling parameters now fail on Claude Opus 4.8, making default sampling the safe path.
The frame
This matches Claude Opus 4.7 behavior, so integrations carrying custom sampling parameters need migration-guide handling.
Primary source
Anthropic →Keep reading
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