AI BriefingDeepSeek to Launch v4.1 Flash on September 10, Outperforming v4 Pro in Performance and Cost
Key point
DeepSeek announced that it will officially launch v4.1 Flash on September 10, stating it outperforms v4 Pro across all metrics.
Details
DeepSeek announced plans to officially launch the v4.1 Flash model around September 10, 2026. Internal and external testing results showed that v4.1 Flash surpassed v4 Pro across key metrics including performance, cost, speed, and task completion time.
From immediately after launch until the release of v4.1 Pro, all Pro model requests will be routed to v4.1 Flash and billed at Flash prices. Additionally, Flash series pricing will be adjusted starting at noon (Beijing Time) on September 10.
Pricing Policy (Off-Peak Hours)
- Input cache hit: $0.003
- Input cache miss: $0.15
- Output: $0.6
- Peak hour prices are applied at 2x the off-peak rates.
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