Anthropic ships claude-agent-sdk-python v0.2.159 with updated bundled Claude CLI
Anthropic released claude-agent-sdk-python v0.2.159, updating the bundled Claude CLI to version 2.1.281. The release also pins the default model for end-to-end tests to claude-opus-5 to work around CI failures caused by the CLI's new default model. The package is available on PyPI via pip install claude-agent-sdk==0.2.159.
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