Unverified50% confidenceFactExact time
Behind the same API endpoint of a closed-source large model, there may be different versions that have undergone weight updates, quantization compression, or inference parameter adjustments, and such changes are typically not disclosed to users.
1
Sources
50%
Confidence
Long-term
Relevance
10/2/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedWhen making API calls, a specific model version number rather than a generic alias should be specified to avoid being automatically routed to a new version; however, even with a locked version number, the service provider may still adjust underlying behavior without changing the version identifier.76% similarUnverified'Silent updates,' where a model is substantially changed without an external version label, are a major source of user anxiety and have driven some enterprise users to migrate toward API call methods that require explicit version locking.71% similarUnverifiedIn Semantic Versioning (SemVer), a Patch-level change commits to not breaking existing APIs.71% similarUnverifiedModel providers frequently perform silent updates to adjust model weights, safety filters, or system-level prompts, but often without explicit changelogs, leaving users unable to track changes or roll back.69% similarUnverifiedThe core change in version 2.0.49 is to retain reasoning content across multi-turn requests by default on supported models.69% similar
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