Anthropic launches Claude Fable 5.2 and Mythos 5.2
The headline calls them the same model with different safeguards; the article body was not available.
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AI model
Claude Fable 5.2
- Mentions · 7d13
- Mentions · 30d13
- All mentions13
- First seenNov 9, 2026
- Last mentioned11h ago
Timeline
13 articles · newest firstAnthropic 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%.
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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.
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Anthropic releases Claude Fable 5.2 and restricted Mythos 5.2
API prices fall 20% to $8 and $40 per million tokens, while Mythos access stays limited to vetted organizations.
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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.
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Meta AI launches Muse Ember, its smallest efficient model
Short prompts match GPT-6 Luna and Claude Haiku 5.5 at $0.10 and $0.50 per million tokens.
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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.
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Claude Fable 5.2 coding edits follow prompt ownership wording
Calling the codebase the model’s led it to merge repeated code in about half of small-task tries, versus under a tenth otherwise.
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Willison prompts Claude Fable 5.2 to animate Yonkers as a mech
He asked Fable 5.2 Medium to use OpenStreetMap data in a Three.js standup-and-stomp animation.
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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.
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Claude Fable 5.2 scores 65 on Artificial Analysis, highest so far
Artificial Analysis Intelligence Index v5.0.1 rates Claude Fable 5.2 at 65, and the model has no public API.
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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.
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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.
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Appears with
- Claude Mythos 5.2ai model · 7
- Anthropicvendor · 7
- Claude Securityproduct · 4
- Anthropicorganization · 3
- Claude Opus 5.5ai model · 2
- Claude Mythos 5.1ai model · 2
- Artificial Analysisorganization · 2
- Mythos 5.2ai model · 2
- Claude Haiku 5.5ai model · 2
- Claude Fable 5.1ai model · 1
- Fable 5.2 Mediumai model · 1
- Opus 5.5ai model · 1
- Mozillaorganization · 1
- Mythos 5.1ai model · 1
- Three.jsproduct · 1
- METRorganization · 1
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