Who reported what
Anthropic Releases Claude Fable 5.1 and Claude Mythos 5.1: 52.6% on Terminal-Bench-Science and 75% Cheaper Cache Reads
Headline by MarkTechPost
4 outlets from 4 owner groupsEarliest report we found: Decrypt, 1 September 2026, 19:29 UTC
Reports, in time order
- DecryptAnthropic Ships Claude Fable 5.1, More Than Doubling Its Predecessor on Key Benchmark (opens Decrypt's report in a new tab)
- TechCrunchAnthropic’s new Fable release is cheaper, less restrictive (opens TechCrunch's report in a new tab)
- MarkTechPostAnthropic Releases Claude Fable 5.1 and Claude Mythos 5.1: 52.6% on Terminal-Bench-Science and 75% Cheaper Cache Reads (opens MarkTechPost's report in a new tab)
- The VergeAnthropic launches Claude Fable 5.1 and says it’s up to 45 percent cheaper for agentic work (opens The Verge's report in a new tab)