Confirmed
Anthropic releases Message Threads to cut time to first token in long conversations
Message Threads for the Messages API sends only changed content instead of resending full conversations each turn. For requests of 500,000 to one million tokens, time to first token drops about 35 percent.
Every outlet that ran it 1 article
The DecoderTech pressLead
Anthropic's Message Threads cut time to first token by 35 percent for long conversations