Anthropic launches message threads in public beta on the Claude Platform
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ClaudeDevsOfficialAnthropic adds a thread parameter for Claude message threadsAIAnthropic says developers can enable message threads by adding a thread parameter and beta header to their requests. The feature is available on the Claude Platform, Claude Platform on AWS, Claude in Microsoft Foundry, and Claude on Google Cloud at standard token rates.
- ClaudeDevsOfficialClaude Code's message threads cut first-token latency about 35% on long requests
AIAnthropic says its recently integrated message threads in Claude Code reduce median time to first token by about 35% on requests with 500K to 1M tokens. In long conversations, the median request size dropped from about 800 KB to 1.8 KB.
- ClaudeDevsOfficialAnthropic's Messages API adds public beta message threads with server-side caching
AIAnthropic says message threads are now in public beta on the Messages API. The API caches conversations on the server between turns, so developers send only new messages plus the previous message ID instead of the full conversation, and Claude responds sooner.
- Claude BlogOfficialPickClaude Platform adds message threads to cut latency in long-running agents
AIAnthropic has released message threads in public beta on the Claude Platform, letting agents send only new messages each turn instead of the full conversation history. For requests with 500k to 1M tokens, median time to first token dropped about 35% for most Claude Code users with the feature on by default. Threads are held in memory for 5 minutes after their last request, and token usage stays the same because Claude still reads the full conversation each turn.