Haider.(@haider1):anthropic's internal Model 4 has achieved 178.76 on AECI it appears that Mythos 5.2 is some checkpoint of Model 3 which also had an AECI of 177 except it was specifically nerfed on AI research as anthropic said... "mythos 5.2 won't double our research pace because we intentionally nerfed it to 1.88x while keeping the model that could hit 2x unreleased"

Haider.

@haider1

open intelligence for a decentralized future

Joined November 2021

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Haider.@haider1

2026.11.11 00:35

anthropic's internal Model 4 has achieved 178.76 on AECI it appears that Mythos 5.2 is some checkpoint of Model 3 which also had an AECI of 177 except it was specifically nerfed on AI research as anthropic said... "mythos 5.2 won't double our research pace because we intentionally nerfed it to 1.88x while keeping the model that could hit 2x unreleased"