LTX HDR beta: $0.20 a second, about 7 seconds at 1080p, so $1.40 max

LTX's HDR Video Generation beta turns an SDR clip into 16-bit HDR for grading and finishing, and it costs $0.20 per input second up to 1080p, $0.40 up to 1440p and $0.80 up to 4K. Because the page caps duration at roughly 7 seconds at 1080p and about 4 seconds at 2560x1440, a single 1080p request cannot cost more than about $1.40 and a 1440p request about $1.60.

What the beta delivers

The page lists the endpoint as video-to-video only, SDR to HDR. Output is delivered as per-frame 16-bit EXR files in ZIP, and billing is per second of input video. The maximum duration depends on the resolution tier. These are beta terms, so plan for them to change.

A finished minute of HDR at 1080p would need roughly nine chained 7-second requests (60 / 7 is 8.6, so 9) costing 9 x $1.40 = $12.60 at the maximum, plus the cost of generating the SDR source. LTX's text-to-video at 1080p Fast is $0.13 per second on 2.5, so the 60-second SDR source is $7.80, for about $20.40 in total before any retries.

What Sume does instead

Sume does not list LTX or an SDR-to-HDR video endpoint in its catalog. Its video jobs return a finished clip you fetch from the job content URL, and the video docs list the resolution and duration of each model. If your goal is only a higher-resolution deliverable, gemini-omni-flash-1.1 lists 4K at $0.375 per second, so 7 seconds is $2.625. That is a resolution upgrade, not a dynamic-range upgrade, and Sume makes no claim about HDR output.

If you need EXR frames for compositing, do that step with a tool that outputs EXR and bring the result back to Sume only as a reference clip or as a source for trimming and captions.

Reading the billing basis

LTX bills this endpoint on the input video, so a failed grade still costs money if the job runs. Trim the source to exactly the shot you need before you submit, and keep a test clip short. A 2-second test at 1080p costs 2 x $0.20 = $0.40, and a 4-second test at 1440p costs 4 x $0.40 = $1.60.

Because the page marks this endpoint beta, rate and duration limits can change, and the page did not state the 4K duration cap in the part we read, so do not estimate 4K runs without confirming it with LTX.

Budgeting a batch

For a batch of 50 shots at the 1080p cap, 50 x $1.40 = $70.00 is the most the page rates imply. Shots that are 3 seconds long cost 3 x $0.20 = $0.60 each, so 50 of them cost $30.00. Because billing is per second of input, cutting shot length is the one lever you control; resolution tier is the other.