Claude Message Threads: 35% Faster First Token, Same Token Bill

Anthropic's message threads beta lets agent loops stop re-uploading the full conversation on every turn, cutting median time to first token about 35% on 500K-1M token requests. The catch: your token bill does not move, threads expire after five idle minutes, and zero-data-retention or HIPAA workload

$ 2026.11.05 · 5 min read · #claude-api

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Claude Message Threads: 35% Faster First Token, Same Token Bill

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