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Drift incident · Raven Alpha (behaviour fingerprint)

gpt-5.4

Model page
✓ ResolvedConfidence: Low
Responses to fixed prompts no longer match this model’s own history (672 recent vs 5950 baseline responses). Biggest shifts: token probabilities on “Name one animal. Reply with one word.”; first token on “Write a haiku about autumn.”; token probabilities on “Give me a one-line motivational quote.”
Oct 21change began ≈ 7:10 PM UTC
Oct 24incident opened 1:44 PM UTC
Nov 4resolved 2:35 PM UTC
5.3e-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 24, 2026, 1:44 PM UTC UTC. Resolved Nov 4, 2026, 2:35 PM UTC UTC: the series returned to its baseline. Methodology.

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Permanent link: https://martingale-bench.vercel.app/incidents/inc-gpt-5.4-fingerprint-2026-10-24T13

Incident id inc-gpt-5.4-fingerprint-2026-10-24T13. Every public incident is also in the Atom feed and the JSON feed, and in the raw data. Methodology v0.2.