AI video generation costs per second in 2026: prices across 13 models at 720p

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At 720p, AI video generation in October 2026 ranges from roughly $0.06 to $0.63 per second of finished footage, depending on the model. Ten-second 720p clips cost about $0.92 on Grok Imagine and up to $3.67 on Kling 2.6, with VEO 3.1 limited to 8-second clips priced at $2.00 or $5.00. The figures come from the authors' own billing formula, which is checked against a platform that runs these models for ad production, rather than from vendors' API rates. The authors argue that headline "from $X per video" prices are misleading because they hide clip length and resolution, and they publish the data as an open CC BY 4.0 dataset. Moving from 720p to 1080p raises costs for some models by 40 to 100 percent, while others charge the same at both resolutions.

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