Home/Events/Anthropic launches Claude Fable 5.1 and Mythos 5.1 with reduced pricing for agentic work

Anthropic launches Claude Fable 5.1 and Mythos 5.1 with reduced pricing for agentic work

Confirmed

Confidence

90%

Impact: 80%

Updated 7h ago

Consensus Brief

Anthropic has launched its latest AI models, Claude Fable 5.1 and Mythos 5.1, which address previous customer criticisms regarding pricing and data retention. Claude Fable 5.1 is reported to be up to 45% cheaper for complex tasks compared to its predecessor, Fable 5.

Sourced from

The VergeT2

Primary: The Verge

What Changed Since Last Update

7h ago

Claude Fable 5.1 offers improved performance and reduced pricing, while Mythos 5.1 is introduced in Project Glasswing with similar biology restrictions as its predecessor.

Claim Ledger

4 claims tracked across sources

Confirmed Fact

Claude Fable 5.1 costs around 25% less typically and up to 45% less for complex agentic tasks.

Official Claim

Fable 5.1 has more precise safeguards that are less likely to block basic biology questions than Fable 5.

Confirmed Fact

Mythos 5.1 has the same biology restrictions as the previous model.

Official Claim

Enterprise Frontier Safeguards offer complete privacy by storing data on the customer’s cloud servers.

Role-Based Impact Analysis

Source Timeline

1 source corroborating

Anthropic launches Claude Fable 5.1 and says it’s up to 45 percent cheaper for agentic work

The Verge·7h ago