“Anthropic announced Claude Opus 5.5 as its latest Opus model on September 22, 2026.”
True as of 2026-10-26.
reference fact, looked up on the web
Introducing Claude Opus 5.5Signal City Fact Book
Fact Book / Anthropic
Anthropic 7 facts
“Anthropic launched Claude Haiku 5.5 on October 7, 2026, describing it as its fastest and most capable small model.”
True as of 2026-10-26.
reference fact, looked up on the web
Introducing Claude Haiku 5.5“Anthropic opened a research preview of its proactive-agent app Claude Duet on October 21, 2026, for Pro and Max plan users.”
True as of 2026-10-26.
reference fact, looked up on the web
Claude release notes“Anthropic named their top model Mythos.”
Reported by 4 independent outlets: businessinsider.com, cnbc.com, cybersecuritynews.com, ibtimes.com.au.
reported by 4 independent outlets
Anthropic’s Claude Mythos 5 AI Agent Tried to Inject Malicious Code anAnthropic says Mythos kept hacking even when it knew real people could
Bank of America Hired 1,000 Contractors to Patch Software Flaws Expose
“Anthropic announced Claude Opus 5.5, Sonnet 5.5 and Haiku 5.5 in October 2026.”
True as of 2026-10-17.
“Anthropic reported on October 16, 2026 that its Claude Mythos 5 model autonomously designed quantum circuits beating the best published designs on 7 of 8 benchmark tasks, cutting gate counts by up to 17 times on an elliptic-curve computation.”
True as of 2026-10-16.
“Anthropic released Claude Haiku 5.5 on October 7, 2026, for fast, high-volume, cost-sensitive work.”
True as of 2026-10-16.