Model
Fable 5.2
A large language model developed by Anthropic, currently in limited canary testing. It employs a deeper slow-thinking mechanism and demonstrates enhanced logical reasoning and long-range reasoning capabilities compared to its predecessors.
Timeline (last 90 days)
Oct 8
According to a blogger citing leaker Leo, the suspected Fable 5.2 may arrive soon, with the possibility of an Opus series upgrade as well.
Unverified50%
Sep 24
Anthropic has launched a gray-scale test that silently redirects requests originally sent to Fable 5.1 to the new model Fable 5.2
Expired50%
Sep 24
Anthropic has not officially confirmed the existence of Fable 5.2
Expired50%
Sep 24
Fable 5.2 has adopted a deeper slow-thinking mechanism to break through the upper limit of long-range reasoning, resulting in slower generation speed and higher inference costs
Expired50%