Anthropic's internal-to-public model lag runs 1-3 months, with Mythos/Fable spiking early
xeophon · x · 2026-09-13
xeophon compiles public reports suggesting frontier labs' internal-to-public model lag is 1-3 months. For Anthropic's Mythos/Fable: internal access Feb 24, Glasswing April 7 (1.5mo), Fable release Jun 9 (3.5mo) — a longer lag than OpenAI's models. The capability curve shows a sharp uptick 3 months before broad availability. The author also notes Anthropic and OpenAI are both leaning on multi-agent systems to push inference-time scaling further.
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