DeepSeek released V4.1 Flash on September 10, 2026, priced at $0.15 per million uncached input tokens and $0.60 per million output tokens off-peak (double during 01:00-04:00 and 06:00-10:00 UTC weekdays). Weights ship under an MIT license for self-hosting, and V4.1 Flash takes over V4 Pro traffic on September 14.
Why this matters for founders
If you run LLM features, benchmark V4.1 Flash against your current model; the off-peak rates and open weights can cut inference costs sharply for high-volume or self-hosted workloads.
Source: The Rundown AI
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