Daily AI CatchupClaude adds message threads to speed up long chats
Anthropic released message threads in public beta, letting agents send only new messages instead of resending the full conversation history each time. For requests between 500K and 1M tokens, this cut median time to first token by roughly 35%, with no change in total token usage. It's aimed at developers building long-running agentic workflows where context windows get large and repeated resending becomes a bottleneck.
Why it matters
💻 Developer · If you're building on the Claude API with long context, this is a straightforward latency win worth adopting as soon as it's stable.
📦 Product · Faster response times on long conversations directly improve perceived quality for any product built on Claude's API.
🎨 Design · Lower latency on long threads means you can design for more conversational, back-and-forth interactions without users feeling the lag.
📈 Business · This is a cost-neutral performance improvement, meaning better user experience without a corresponding bill increase from Anthropic.
🤔 Just Curious · A simple fix: instead of re-sending an entire conversation every time, Claude now just sends what's new, making long chats noticeably snappier.
Sources: Claude Introduces Message Threads