ClaudeDevs(@ClaudeDevs):Message threads are now in public beta on the Messages API. The API caches your conversation on the server between turns, so instead of resending the full conversation, you send only new messages and the previous message ID, and Claude starts responding sooner.

ClaudeDevs

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Official updates for developers building with @ClaudeAI

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ClaudeDevs@ClaudeDevs

2026.11.02 19:06

Message threads are now in public beta on the Messages API. The API caches your conversation on the server between turns, so instead of resending the full conversation, you send only new messages and the previous message ID, and Claude starts responding sooner.