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Drift incident · Raven Alpha (behaviour fingerprint)

gpt-6-luna

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✓ ResolvedConfidence: Low
Responses to fixed prompts no longer match this model’s own history (1344 recent vs 12830 baseline responses). Biggest shifts: output length on “Name a famous scientist. Reply with only the name.”; output length on “Flip a coin. Reply with only heads or tails.”; reasoning tokens on “Flip a coin. Reply with only heads or tails.”
Oct 18change began ≈ 1:00 PM UTC
Oct 19incident opened 9:05 PM UTC
Oct 20resolved 8:36 PM UTC
6.4e-3adjusted p

What this means

Raven Alpha compares how the model answers a fixed set of open-ended prompts with its own history. A persistent, significant shift means the model, its configuration or its serving path changed, even when every scored test still passes.

Opened Oct 19, 2026, 9:05 PM UTC UTC. Resolved Oct 20, 2026, 8:36 PM UTC UTC: the series returned to its baseline. Methodology.

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Permanent link: https://martingale-bench.vercel.app/incidents/inc-gpt-6-luna-fingerprint-2026-10-19T21

Incident id inc-gpt-6-luna-fingerprint-2026-10-19T21. Every public incident is also in the Atom feed and the JSON feed, and in the raw data. Methodology v0.2.