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# Breaking News: Anthropic Cuts Fable Input and Output Prices 20%
- URL: https://www.implicator.ai/anthropic-fable-5-2-mythos-5-2-price-cut/
- Published: 2026-11-09T19:01:17.000Z
- Updated: 2026-11-09T20:11:51.000Z
- Description: Anthropic released Claude Fable 5.2 and Claude Mythos 5.2 on November 9, cutting Fable's input and output prices 20% to $8 and $40 per million tokens. Fable 5.2 is available on all platforms, while Mythos stays limited to vetted organizations in its Life Sciences and Cyber Verification Programs. Ant
- Author: Marcus Schuler
- Tags: AI News

Anthropic [released Claude Fable 5.2 and Claude Mythos 5.2](https://anthropic.com/claude-fable-and-mythos-5-2?ref=implicator.ai) on Monday, cutting Fable’s input and output prices and keeping Mythos restricted to vetted organizations. Fable 5.2 now costs $8 per million input tokens and $40 per million output tokens, a 20% reduction on both rates. Fable is available today across all platforms; Mythos access runs through Anthropic’s Life Sciences and Cyber Verification Programs.

The price cut follows [Fable 5.1’s September release](https://www.implicator.ai/anthropic-fable-5-1-same-price-cache-reads-cut/), which kept its predecessor’s pricing at $10 per million input tokens and $50 per million output tokens.

Anthropic still recommends Claude Opus 5.5 as the starting point for most coding and knowledge tasks, calling it “our strongest daily driver.” The new models target harder technical work rather than replacing that recommendation.

In Monday’s launch materials, Anthropic said both new models generate outputs up to 30% faster than their respective 5.1 predecessors. A separate Fast mode runs Fable 5.2 with faster inference while retaining the same model intelligence, the company said.

Anthropic published a [system card](https://www.anthropic.com/document/claude-fable-5-2-mythos-5-2-system-card?ref=implicator.ai) for both models and said Fable 5.2’s cyber and biology safeguards are “as robust as those of Fable 5.1’s,” with around 55% fewer unnecessary blocks. Enterprise Frontier Safeguards, which supports zero data retention, is in private beta with customers including Bridgewater, Salesforce and Stripe.

Anthropic also said Fable 5.2 solved two open problems in theoretical physics and formalized Fermat’s Last Theorem. Those scientific claims, the 30% speed gain and the 55% reduction in blocks could not be independently verified at publication.

Customer results supplied with Monday’s announcement also describe gains in security testing. In quotes Anthropic distributed with the launch, Brian Grinstead, distinguished engineer at Mozilla, said Mozilla has used successive Claude models to harden Firefox all year, and “each round has left fewer, subtler bugs to find.” Mythos 5.2, he said, “roughly doubled the vulnerability discovery metrics of Claude Mythos 5.1 across respective scanning campaigns.”

Grinstead’s comparison covers Mozilla’s own scanning campaigns. The supplied materials do not establish how that result would carry over to other software or testing conditions.

*More details soon here on implicator.ai.*