Gemini Omni Flash 1.1, 9 seconds vertical: $3.38 at 4K, $0.34 at 360p

A 9-second vertical clip on Gemini Omni Flash 1.1 costs $0.34 at 360p, $1.13 at 720p, $1.69 at 1080p and $3.38 at 4K on Sume. The model id is gemini-omni-flash-1.1. It accepts 3 to 10 seconds in 16:9 or 9:16, and native synced audio is always on, so there is no separate audio line item.

The arithmetic at each tier

Nine seconds sits one second below the 10-second ceiling, so it is a realistic length for a vertical ad. All figures are rate times 9, rounded half up for display.

Constraints that apply

The 9:16 ratio is one of only two the row accepts. If you need 1:1 or 4:3, pick a different row. The prompt can be up to 20,000 characters according to the catalog constraints, and you can supply up to 10 reference images and up to 3 reference clips of 3 seconds each.

Audio cannot be switched off: the API rejects generate_audio: false for this row. If you need a silent clip you will have to drop the track afterwards.

• Allowed durations: 3 to 10 seconds.
• Resolutions: 360p, 720p, 1080p, 4K.
• Aspect ratios: 16:9 and 9:16 only.

A tiered plan for 9 seconds

Draft at 360p for $0.34, confirm framing and sound, then render once at 4K for $3.38. The pair costs $3.71 (0.3375 + 3.375 = 3.7125). Compare that to three blind 4K attempts at $10.13.

What 4K buys you

The 4K rate of $0.375 is double the 1080p rate of $0.1875 and ten times the 360p rate of $0.0375. Pay for it when the clip will be cropped, punched in on, or shown on a large screen, since a vertical 9:16 clip viewed on a phone rarely needs more than 1080p.

If the destination is a social feed, 720p at $1.13 for 9 seconds is the usual place to stop, and the platform will recompress the file anyway.