Anthropic Cuts Prices 20 Percent With Claude Fable 5.2 and Reports 49.1 Percent on FrontierCode 2.0

Anthropic released Claude Fable 5.2 and Claude Mythos 5.2 on November 9 and described them as its most capable models for coding, finance and the sciences. Mythos 5.2 is the same underlying model with fewer safeguards. Access to it is restricted to vetted organizations.

The vendor-reported coding gains are large. According to the table compiled by DataCamp, Fable 5.2 scores 49.1 percent on FrontierCode 2.0, up from 32.4 percent for Fable 5.1 and above Opus 5.5 at 45.5 percent. It scores 69.9 percent on FrontierSWE v2 against 62.3 percent for Opus 5.5. Anthropic also reports 41.3 percent on Remote Labor Index, against 21.3 percent for Opus 5.5, and 89.3 percent on OSWorld 2.1. On the restricted model, CVE Rediscovery rises to 89.6 percent from 78.3 percent for Mythos 5.1.

Several of these figures hold up less well once their conditions are specified. The FrontierCode figure is reported at the highest effort setting. Third-party coverage gives 37.6 percent at medium and 45.3 percent at high, so cost per solved task depends on the effort setting. On Terminal-Bench 4.0, Fable 5.2's 67.6 percent against Opus 5.5's 66.4 percent falls within margins of error. One independent HealthBench run put Fable 5.2 at 58.8 percent, below Opus 5.5 at 64.3 percent. Most published figures trace back to Anthropic's own launch materials and have not been independently reproduced.

Pricing moved in the opposite direction from the capability claims. Fable 5.2 costs $8 input and $40 output per million tokens, down from $10 and $50, and cache and batch rates fell by the same 20 percent. Mythos 5.2 carries the same list rates. Implicator notes that Anthropic's claim of output up to 30 percent faster than 5.1 could not be verified at publication.