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Claude Fable 5.1 and Claude Mythos 5.1

SteadyVane has taken 41 readings of Claude Fable 5.1 and Claude Mythos 5.1 since Sep 1, 2026: 166 points at the first reading, 1,415 at the latest (+1,249). Its biggest one-day gain was +611 on Sep 1, 2026.

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166

first seen points

1,415

peak points

1,415

latest points

observations

first seen Sep 1, 2026 · last seen Sep 6, 2026 · published Sep 1, 2026

Day by day

Day (UTC)	points	Change
Sep 6, 2026	1,415	+2
Sep 5, 2026	1,413	+2
Sep 4, 2026	1,411	+7
Sep 3, 2026	1,404	+31
Sep 2, 2026	1,373	+596
Sep 1, 2026	777	+611

Each day's last reading. Change: against the day before (after days with no reading: since the last day that has one); the first day shows the change within that day.

On the tracker; not yet featured in a brief.

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