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Beta. Estimates only. Timings come from the model makers' own published benchmarks, and prices from provider pricing pages and APIs. Your settings, drivers and cloud host will change real costs. We have run no benchmarks ourselves.
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Wan 2.1 VRAM and GPU requirements

The lightest Wan 2.1 model in the official benchmarks is Wan2.1 T2V-1.3B, peaking at 8.19 GB per GPU (T2V 480P on 1× RTX 4090). The heaviest measured, Wan2.1 I2V-14B, peaks at 31.6 GB on its lowest setting.

Last checked 2026-10-17 on the official pages.

Lowest measured peak memory per GPU for every Wan 2.1 model, from the model makers' own benchmark tables and READMEs. We have not run these ourselves.

ModelLowest measured peak / GPUREADME saysBenchmarked GPUs
Wan2.1 T2V-14B28.6 GB (T2V 720P, 8× A100/A800)—A100/A800, H100/H800, H20
Wan2.1 I2V-14B31.6 GB (I2V 720P, 8× A100/A800)—A100/A800, H100/H800, H20
Wan2.1 T2V-1.3B8.19 GB (T2V 480P, 1× RTX 4090)Needs only 8.19 GB VRAM; a 5-second 480P video on an RTX 4090 takes about 4 minutesRTX 4090

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Cost per video: Wan2.1 T2V-14B · Wan2.1 I2V-14B · Wan2.1 T2V-1.3B

Frequently asked questions

How much VRAM does Wan 2.1 need?

The lightest Wan 2.1 model in the official benchmarks is Wan2.1 T2V-1.3B, peaking at 8.19 GB per GPU (T2V 480P on 1× RTX 4090). The heaviest measured, Wan2.1 I2V-14B, peaks at 31.6 GB on its lowest setting.

Can an RTX 4090 run Wan 2.1?

Yes, per the official benchmark: Wan2.1 T2V-1.3B ran on one RTX 4090 at 8.19 GB peak.