Anthropic cuts prices on Claude Fable 5.2, restricts access to Mythos model

This price reduction represents a 20% decrease for both rates. The change applies to developers using the models based on data volume, as detailed in Anthropic’s official announcement.

Anthropic claims the new models generate responses up to 30% faster than version 5.1. An optional accelerated mode is available at double the standard rate: $16 per million input tokens and $80 per million output tokens. This speed increase is based on Anthropic’s internal testing and may not be consistent across all real-world requests.

While Fable 5.2 and Mythos 5.2 are built on the same core model, they differ in terms of protections and access. Fable includes enhanced safeguards for cybersecurity and biological applications, while Mythos is reserved for companies and research teams admitted to specific verification programs.

Fable 5.2 is available on Claude services and major developer platforms including Amazon Web Services, Google Cloud, and Microsoft Azure. Access to Mythos is subject to stricter conditions for specialized uses. Anthropic is also offering additional usage capabilities to eligible paying subscribers this week, with specific quotas depending on their contracts.

For businesses automating numerous documents or development operations, the final cost will still depend on the number of tokens used, the chosen model, and any use of the accelerated mode. While the unit price has decreased, increased consumption due to longer or more numerous tasks could offset the savings. The quality of the results should be tested within real-world business processes.

Anthropic states that the models have been used for software migrations, scientific work, and complex research, publishing favorable benchmark results in several areas. These results are presented by the company and their applicability to all client projects cannot be guaranteed.

Anthropic also notes that data processing may require temporary retention of exchanges for safety monitoring, with specific arrangements for professional clients. Data confidentiality, retention, and compliance conditions warrant the same scrutiny as the API pricing.