โOh God, no! Not another thing:โ What Anthropicโs Mythos-class Fable 5 means for CEOs trying to govern AI
Also: All the news and watercooler chat from Fortune.

๐บ๐ธ ๋ฏธ๊ตญ ยท "MYTHOS-CLASS" ยท ์ด 9๊ฑด
ํํฐ ๋ณด๊ธฐํ์ฌ ์ง์
48.8
0 = ๋ถ์ ์ฐ์ธ
50 = ์ค๋ฆฝ
100 = ๊ธ์ ์ฐ์ธ
์ต๊ทผ 7์ผ ๊ธฐ์ค 12,704๊ฑด์ ๋ถ์ํ ๊ฒฐ๊ณผ, ๋ด์ค ์ฌ๋ฆฌ์ง์๋ 48.8(๊ท ํ)์ ๋๋ค. ๊ธ์ 1,295๊ฑด(10.2%)ยท์ค๋ฆฝ 9,051๊ฑด(71.2%)ยท๋ถ์ 2,358๊ฑด(18.6%)์ด๋ฉฐ, ์ค๋ฆฝ ๋น์ค์ด ๋๋ ทํ๊ฒ ๋์ต๋๋ค. ์ฑํฅ ์ง์๋ ์ข ํฉ 21.9(๋ณด์ ๊ฒฝํฅ)์ ๋๋ค.
Also: All the news and watercooler chat from Fortune.

Anthropic released Claude Fable, its first Mythos-class AI model, yesterday and it's already causing concerns inside Microsoft. Sources tell me that Microsoft is limiting the use of Claude Fable 5 for employees because of Anthropic's new data retention requirements. While Microsoft quickly rolled out Claude Fable 5 to its GitHub Copilot and Foundry customers, I'm [โฆ]

The broad safeguards built into Anthropic's Claude Fable 5, a Mythos-class AI model, blocks some mundane requests on cybersecurity and biology.
Anthropic said it could not yet release the full Claude Mythos 5 model, so instead it created Fable 5 with baked in safeguards.
Anthropic is releasing Claude Fable 5, its first Mythos-class model available to the public. The model comes with guardrails that block responses in high-risk areas like cybersecurity and biology.
Anthropic first announced Mythos in April, which it called a "step change" in capabilities, but opted to tightly control its rollout through an initiative called Project Glasswing.

Anthropic just announced Claude Fable 5, a new AI model it said is the most powerful model it has ever made widely available. According to the company, Fable 5 "shows exceptional performance in software engineering, knowledge work, and vision," with its lead over other models growing as tasks become longer and more complex. Fable 5 [โฆ]

Anthropic is releasing Claude Fable 5, its first Mythos-class model available to the public. The model comes with guardrails that block responses in high-risk areas like cybersecurity and biology.
Claude Opus 4.8 brings improvements in coding and honesty, while Anthropic says Mythos-class models could reach all customers within weeks