Anthropic's new Claude Fable 5.2 is cheaper and faster than its last model and now ranks first on a closely watched AI leaderboard.
Anthropic has released Claude Fable 5.2, and it is now the top-ranked AI model on the Artificial Analysis Intelligence Index. It is also 20% cheaper and up to 30% faster than the version before it, Fable 5.1. It beat Google's Gemini 4 Carbon by 5 points, and Google has not even released that model yet.
Anthropic launched two models together: Fable 5.2 and Mythos 5.2. They are the same underlying model with different limits. Mythos has fewer restrictions and goes only to vetted security and life sciences groups. Fable has stronger guardrails around hacking and biology topics, which is the one most people and businesses would use.
The release also shows what Anthropic means by slowing down. CEO Dario Amodei has called for the industry to "pace the frontier." Anthropic executive Dianne Penn said the company "called for pacing, not pausing." Fable was held near the level of Opus, an earlier Anthropic model family, in certain skills that speed up software development.
Anthropic showed two big tests. Teams of 1,000 Fable agents built an operating system in 8 days. They also formalized the full proof of a famous math problem in 30 hours. An agent is an AI that works through a task with little hand-holding. These are company demos, not everyday office jobs.
Pricing is measured in tokens, which are small chunks of text the AI reads and writes. Fable 5.2 costs $8 per million tokens going in and $40 per million coming out. That is still twice the price of Opus 5.5. It is cheaper than 5.1, but not the budget option.
The main audience is companies that pay for AI tools or build on them. Prices are falling while quality rises, so it may be worth rechecking which plan or model your team uses. Cheaper options exist too. Meta says its new Muse Ember matches Anthropic's budget Claude Haiku 5.5 on a benchmark score at about one-third of the cost per task.
If your business pays for AI, check whether a newer or cheaper model fits your work better than the one you use today.
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