Unverified50% confidenceSolutionExact time
Using a rolling alias (such as deepseek-flash) cannot reproduce historical behavior, whereas a dated model ID (such as deepseek-v4.1-flash-1017) pins to a specific version and is suitable for change control and regression comparison in production.
1
Sources
50%
Confidence
Long-term
Relevance
10/19/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedOn October 17, 2026, DeepSeek replaced the checkpoint behind the deepseek-flash alias with V4.1 Flash 1017, keeping the model name and price unchanged.73% similarUnverifiedDeepSeek replaced the model behind the deepseek-flash API endpoint with a new checkpoint, DeepSeek-V4.1-Flash-1017, without a changelog or email notification.72% similarUnverifiedDeepSeek embedding date cutoffs in version names is a variant of the fixed version snapshot approach, but the premise is that callers can actually target that cutoff via the API or weight repository.68% similarUnverifiedThe release information for DeepSeek V4.1 Flash (1017) only gives a "leading" conclusion and does not disclose key parameters such as model size, context length or license agreement.68% similar
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