How does Claude Sonnet 5's alignment profile compare to Claude Sonnet 4.6's?

Anthropic's safety assessment reports an overall lower rate of undesirable behaviors on Sonnet 5 compared to Sonnet 4.6, including specifically lower rates of hallucination, sycophancy, and cooperation with misuse attempts.

Sonnet 5 is also described as generally safer to use in agentic contexts than its predecessor, which matters given how much more autonomous, tool-using work the model is designed to handle compared to earlier Sonnet generations.

That said, Sonnet 5 is still reported to trail Opus 4.8 and Anthropic's most capable alignment-focused systems on certain specific alignment evaluations, so the improvement over Sonnet 4.6 doesn't put it on the same alignment footing as the top of Anthropic's current model lineup.

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