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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 (1294 recent vs 2688 baseline responses). Biggest shifts: output length on “all prompts together”; reasoning tokens on “all prompts together”; visible output length on “Name one programming language. Reply with only its name.”
Oct 7change began ≈ 12:38 PM UTC
Oct 8incident opened 6:01 PM UTC
Oct 9resolved 11:12 AM UTC
3.2e-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 8, 2026, 6:01 PM UTC UTC. Resolved Oct 9, 2026, 11:12 AM 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-2026-10-08T18

Incident id inc-gpt-6-luna-fingerprint-2026-10-08T18. Every public incident is also in the Atom feed and the JSON feed, and in the raw data. Methodology v0.2.