Anthropic PHP SDK v0.52.0 adds claude-sonnet-5-5 and between_tools thinking
Anthropic released anthropic-sdk-php v0.52.0, adding the claude-sonnet-5-5 model, a between_tools thinking type, and cache diagnostics reaching GA on Message and MessageCreateParams. It also adds typed event values to the Managed Agents events filter, workspace rate-limit fields, Vertex region support, and fixes streaming delivery and restricted message services.
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