Anthropic的API会悄悄把你的Claude Fable-5请求换成Opus-4-8，还不告诉你。付了高价却得低配输出，太坑了。
Anthropic的API在调用时，若请求被分类为敏感类别，会自动将用户指定的"claude-fable-5"模型切换为"claude-opus-4-8"，不返回错误。这意味着用户支付了高等级模型的费用，却获得低等级模型的输出。该行为仅在返回字段中显示不同模型名，无任何通知。这种隐形替换引发了API透明性和计费公平性的质疑。
You Didn’t Get the AI Model You Paid For
The line in the response object You call the API. You pass model: “claude-fable-5”. You get back a completion, a token count, and a field that reads “model”: “claude-opus-4-8”. Nothing errored. Nothing retried. The request was classified before generation began, matched a sensitive category, and was handed to a different set of weights entirely. Anthropic […] The post You Didn’t Get the AI Model You Paid For appeared first on MarkTechPost .