Change feed / 2026-07-16
Developer reports of behavior shift on gpt-5.1 alias without changelog entry
Multiple developer reports of changed refusal behavior on the floating gpt-5.1 alias while dated snapshots remained stable. No corresponding entry on the deprecations/changelog pages. Illustrates the alias-vs-snapshot distinction this index tracks.
Evidencequoted verbatim from the source
Sources (1)
- OpenAI developer community threadCurated manually; endpoint fingerprinting (Phase 2) will verify future occurrences.
How to cite thisCC BY 4.0 — reuse freely, attribution required
Plain
ModelRiskIndex. "Developer reports of behavior shift on gpt-5.1 alias without changelog entry." Change feed, 2026-07-16. https://modelriskindex.com/changes/gpt-5-1-router-tuning-2026-07
BibTeX
@misc{mri-2026-07-16,
title = {Developer reports of behavior shift on gpt-5.1 alias without changelog entry},
author = {{ModelRiskIndex}},
year = {2026},
note = {Change feed, 2026-07-16},
url = {https://modelriskindex.com/changes/gpt-5-1-router-tuning-2026-07}
}Please cite the dated entry rather than the site root. Every assessment here is a point-in-time judgment bound to evidence retrieved on a specific date — an undated citation asserts something the data does not.
