Claude Mythos 5.2

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First seenNov 9, 2026
Last mentioned16h ago

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8 articles · newest first

Anthropic releases Claude Fable 5.2 and Mythos 5.2

Mythos rediscovered 89.6% of 1,829 published CVEs in Anthropic’s benchmark, and sandbox-escape use fell to 3.1%.

Help Net Securityupdated Nov 10, 14:59 UTC · 12h agofirst Nov 10, 11:40 UTC · 16h agoModel release 15 sources1

Anthropic launches Claude Mythos 5.2 for vulnerability research

Anthropic reports 76.3% on CyScenarioBench and 89.6% rediscovering 1,829 known CVEs, not unknown zero-days.

Cyber Security Newsupdated Nov 10, 14:59 UTC · 12h agofirst Nov 10, 10:03 UTC · 17h agoModel release 15 sources1

Anthropic releases Claude Fable 5.2 and Claude Mythos 5.2

Anthropic says Fable 5.2 finished 76.3 percent of CyScenarioBench tasks, ahead of GPT-6 Cyber at 61 percent.

The Hacker Newsupdated Nov 10, 14:59 UTC · 12h agofirst Nov 10, 08:16 UTC · 19h agoModel release 15 sources1

Anthropic ships Claude Fable 5.2 and retakes the top LLM rank

Artificial Analysis ranks Fable 5.2 first at 65, ahead of Gemini 4 Carbon at 60.

Latent Spaceupdated Nov 10, 14:59 UTC · 12h agofirst Nov 10, 06:34 UTC · 21h agoModel release 15 sources1 · 1 read

Anthropic releases Claude Fable 5.2 and Mythos 5.2

Fable is public with cyber and biology blocks; Mythos is limited to verified cybersecurity and life-sciences organizations.

The Decoderupdated Nov 10, 14:59 UTC · 12h agofirst Nov 9, 21:15 UTC · 1d agoModel release 15 sources

Anthropic releases Mythos 5.2 and Fable 5.2 amid RSI concerns

Fable input pricing falls to $8 per million tokens, with 30% faster responses and enterprise zero-data-retention support.

TechCrunch · AIupdated Nov 10, 14:59 UTC · 12h agofirst Nov 9, 19:24 UTC · 1d agoModel release 15 sources

Anthropic launches Claude Fable 5.2 and Mythos 5.2

Fable 5.2 is available now, while Mythos 5.2 starts with access only for vetted organizations.

The Verge · AIupdated Nov 10, 14:59 UTC · 12h agofirst Nov 9, 19:00 UTC · 1d agoModel release 15 sources

Anthropic releases Claude Fable 5.2 and Mythos 5.2

Fable is broadly available with cyber and biology safeguards; Mythos is limited to vetted programs and starts at $8 per million input tokens.

Hacker News · AIupdated Nov 10, 14:59 UTC · 12h agofirst Nov 9, 18:56 UTC · 1d agoModel release 15 sources HN 67 points · 9 comments1

Appears with

Claude Fable 5.2ai model · 7
Anthropicvendor · 6
Claude Securityproduct · 3
Claude Mythos 5.1ai model · 2
Claude Opus 5.5ai model · 2
Anthropicorganization · 2
METRorganization · 2
UK AI Security Instituteorganization · 1
Fable 5.2ai model · 1
GPT-6 Cyberai model · 1
Mythos 5.2ai model · 1
Claude Sonnet 5.5ai model · 1
Artificial Analysisorganization · 1
Physical Superintelligenceorganization · 1
Claude Fable 5.1ai model · 1
Mozillaorganization · 1

Entities are extracted by the model from each article. First seen Nov 9, 2026, last mentioned 16h ago. Watching keeps it in this browser only (no account); the watchlist page and dashboard alerts use it.