Expired50% confidenceEventExact time
Anthropic is testing Claude Sonnet 5.5 (labeled as Sonnet 55), with some partners receiving access for only 24 hours.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
9/28/2026
First Seen
Valid until: 10/12/2026(expired)
Sources
Related Entities
Cite This Claim
Stable URI
https://kongchang.com/claim/954851API
curl https://kongchang.com/api/v1/knowledge/claims/954851MCP
get_claim(id=954851)