[AINews] Claude Fable/Mythos 5.1: new SOTA model, 75% cache price cut but 70% more output tokens
· Source: Latent Space
Claude AI has announced the release of Claude Fable 5.1 and Claude Mythos 5.1, two models aimed at programming and knowledge‑based tasks. According to the published reference table, both versions outperform their predecessors (Fable 5 and Opus 5) and the preliminary GPT‑5.6 across the seven evaluated benchmarks, with gains exceeding 50 % on tests such as Terminal‑Bench‑Science 0.1 and Terminal‑Bench 4.0.
Regarding pricing, the cost per generated token remains unchanged from the previous version, but the price for cache reads has dropped by 75 %. This discount benefits users running long sessions or requiring extensive contexts. However, analyses by Artificial Analysis show that output token consumption has risen by roughly 70 %, resulting in a net 20 % increase in the total cost per task.
These changes arrive at a time when other providers, such as Grok 4.7 and Gemini Flash 3.8, are also preparing their next releases, intensifying competition in the large‑scale model segment. The announcement is significant because it illustrates how the drive to improve technical performance translates into pricing adjustments that can affect both developers and companies that rely on AI for coding and data‑analysis workflows.
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