Unverified50% confidenceFactExact time
The stop_reason field in the top-level response of the Anthropic Messages API has seven possible values in total: end_turn, tool_use, max_tokens, stop_sequence, refusal, pause_turn, and model_context_window_exceeded.
1
Sources
50%
Confidence
Long-term
Relevance
10/13/2026
First Seen
Sources
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