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
Mythos 5.2
- Mentions · 7d6
- Mentions · 30d6
- All mentions6
- First seenNov 9, 2026
- Last mentioned11h ago
Timeline
6 articles · newest firstAnthropic rolls out Mythos 5.2 with improved bug hunting, fewer sandbox escapes
Mozilla says Mythos 5.2 roughly doubled Firefox vulnerability finds versus 5.1; CVE rediscovery hit 89.6% on 1,829 flaws.
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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's Mythos bug-finder is heading into Cisco and IBM products
Customers get Mythos through the vendors' tools, not the model itself; version 5.2 also launched with lower token prices.
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llm-anthropic 0.31 adds Anthropic Fable 5.2 and Mythos 5.2
Willison says max reasoning on Fable 5.2 spent 128,000 tokens thinking and returned no image, a bug he also saw on Opus 5.5.
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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.
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Appears with
- Anthropicvendor · 5
- Fable 5.2ai model · 4
- Mythos 5.1ai model · 2
- Claude Fable 5.2ai model · 2
- Claude Securityproduct · 2
- Opus 5.5ai model · 2
- Fableai model · 1
- Fable 5.1ai model · 1
- Mythos 5ai model · 1
- AI Defenseproduct · 1
- Claude Mythos 5.2ai model · 1
- Mythosai model · 1
- Opus 4.8ai model · 1
- Physical Superintelligenceorganization · 1
- Claude Fable 5.2product · 1
- IBMvendor · 1
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