build1 distinct publisher
Anthropic ships a cache differ, and concedes prompt caching was failing silently
A new beta fingerprints each request and names the first structural divergence from a prior response id. Until now the only signal was cache_read_input_tokens going to zero.
Publishers:platform.claude.com
Reality
- Evidence62
- Adoption
- Insufficient
- Hype gap+14
- Incentives74
- Confidence55