Anthropic 在 Claude 平台推出 Message Threads 公测，长对话首字延迟降低约 35%
Anthropic's Message Threads cut time to first token by 35 percent for long conversations
Anthropic 在 Claude 平台以公开测试版形式推出 Message Threads。此前每次 API 请求都需重发完整对话历史，新机制只传输自上一条消息以来的变化，据 Anthropic 称在 50 万至 100 万 token 的请求上可将首字时间缩短约 35%。
Nov 3, 2026
Anthropic released Message Threads as a public beta on its Claude platform. Until now, every API request had to resend the entire conversation history. Message Threads only transmits what's changed since the last message, cutting time to first token by about 35 percent for requests between 500,000 and one million tokens, according to Anthropic.
Coding agents, computer-use agents, and workflows processing lots of documents or images benefit the most, the company says. The thread stays encrypted in memory between requests and expires after five minutes of inactivity. Token usage doesn't change since Claude still reads the full conversation history. The feature works on the Claude platform and through AWS, Microsoft Foundry, and Google Cloud. Details are in the documentation.
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来源：The Decoder：AI News · the-decoder.com