modeldrift.watchA daily record of AI model behavior. All times UTC.

Observation period — public launch soon. The record below is real and updated daily.

Prompt·drift

D7

Return only valid JSON matching {"city": string, "population": integer, "country": string} for Osaka. No markdown, no code fences, no explanation.
Category
drift
Why
Scored by parse attempt on raw string.
Format ok if
the response returns bare JSON matching the requested schema

History — newest first; tags link to change events

Dateclaude-opus-5gemini-3.1-pro-previewgpt-5.6-sol
2026-09-11answered · format okanswered · format okanswered · format ok
Significant
2026-09-10answered · format okanswered · format okanswered · format ok