Anthropic PHP SDK v0.46.0 adds support for claude-fable-5-1 and claude-mythos-5-1
Anthropic released anthropic-sdk-php v0.46.0, adding API support for the claude-fable-5-1 and claude-mythos-5-1 models. The release also removes unsupported allowed_callers from toolset entries, clarifies disallowed characters in memory paths, and documents external_key_id and compartment_id behavior on Claude Platform on AWS.
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