Anthropic releases Claude Fable 5.2 and Mythos 5.2: 30% faster, Fable cut to $8/$40

Anthropic shipped Claude Fable 5.2 and Claude Mythos 5.2 on November 9. Both models generate output 30% faster than the 5.1 generation and improve coding, reasoning and vision. Fable 5.2 drops to $8 per million input tokens and $40 per million output tokens, down from $10/$50, a 20% cut. Fable 5.2 is open to all Claude users. Mythos 5.2 is restricted to Anthropic's verification programs for advanced cybersecurity and life-sciences work.

AWS made both models available on Bedrock the same day. In its launch post, AWS calls Fable 5.2 Anthropic's most capable generally available model for technical work. It says the model takes on ambiguous, multi-step work, verifies its own output, and can run unattended for hours to days. In Anthropic's alignment testing, Mythos 5.2 hallucinates less and self-reports issues more honestly than Opus 5.5, Sonnet 5.5 and Mythos 5.1.

There is also a new refusal-fallback mechanism. A declined cyber query can be retried on Opus 4.8, and a declined biology query on Opus 5. On Bedrock that retry is the developer's job, not an automatic switch. If the refused request hit the prompt cache, a fallback credit token lets the retry bill as cache reads, so customers don't pay to write the same cache twice.

Community reaction has been the biggest of the cycle. The HN launch thread reached 879 points and 1,007 comments. Ethan Mollick called Fable 5.2 "a sort of Jagged AGI", and an r/singularity post about a Gears of War clone built from a 3-line prompt drew 1,588 upvotes. Critics note the benchmarks are self-reported, and Google's Gemini 4 Carbon arrived a day later at a much lower price.