AI Models · Lightricks
LTX 2.5 — sound and picture, in one fast pass.
LTX 2.5 is Lightricks’ video family, and it is the practical middle of King AI’s roster: 1080p with audio generated alongside the frames, 1.7 credits a second on the Pro tier and 1.3 on the Fast tier, which runs to 20 seconds.
Specs
What LTX 2.5 Pro actually does.
Every figure below is read from the app's own model catalog at build time, so it is the number you will be charged — not a rounded marketing estimate.
| Mode | Engine | Max resolution | Clip length | Audio | Credits |
|---|---|---|---|---|---|
| Text to video, Pro | LTX 2.5 Pro | 1080p | 6s·8s·10s | Yes | 1.7 per second (~$0.68) |
| Image to video, Pro | LTX 2.5 Pro | 1080p | 6s·8s·10s | Yes | 1.7 per second (~$0.68) |
| Text to video, Fast | LTX 2.5 Fast | 1080p | 10s·20s | Yes | 1.3 per second (~$0.52) |
| Image to video, Fast | LTX 2.5 Fast | 1080p | 10s·20s | Yes | 1.3 per second (~$0.52) |
Strengths
What LTX 2.5 Pro does best.
Fast, cheap 1080p with native audio, and 20 seconds on the fast tier.
Audio on all four tiers
Pro, Fast, text-to-video and image-to-video all generate sound with the picture. A cheap LTX draft is not a silent draft, so you can judge the sound before you pay the Pro rate.
A long 1080p take with sound
LTX 2.5 Fast reaches 20 seconds at 1080p with sound, at 1.3 credits a second. Among the engines that go that long at that resolution, Flux 3 Max 1080p is the cheapest at 0.725, and WAN 3.0 1080p reaches 30 seconds at 2.
Two tiers, one prompt box
LTX 2.5 Fast at 1.3 credits a second and LTX 2.5 Pro at 1.7 share a resolution and a prompt box. Explore on Fast, then re-run the keeper’s prompt on Pro.
Lengths that suit an edit
Pro offers 6, 8 or 10 seconds; Fast offers 10 or 20 seconds. The shortest LTX 2.5 clip is 6 seconds, long enough for a complete gesture.
Limits
Where LTX 2.5 is the wrong pick.
No model wins every shot. These are the cases where something else in the app is the better spend.
There is no 4K tier and no 2K tier. 1080p is the ceiling on all four modes, so a 4K delivery has to be generated on a 4K tier of Veo, Kling, Seedance or Vidu, or upscaled afterwards.
The Pro tier stops at 10 seconds. The 20-second reach belongs to the Fast tier only, so a long take and the Pro tier’s finish are not available in the same generation — pick one.
It is not the cheapest engine in the catalog. Grok Imagine 1.5 Lite bills 0.3 credits a second at 720p, MiniMax H3 Max Turbo bills 0.4 at 768p and PixVerse V6 bills 1.15 at 1080p, all under LTX 2.5 Fast’s 1.3.
LTX 2.5 has no reference mode, no start-and-end-frame mode and no extend mode. A character carried across shots or a defined opening and closing frame has to move to another engine, and a clip is lengthened in the video extender.
Head to head
LTX 2.5 Pro against the alternatives.
The same six columns for the models you would realistically pick instead, on the same job.
| Model | Max resolution | Clip length | Audio | Credits per second | Shortest clip |
|---|---|---|---|---|---|
| LTX 2.5 Pro | 1080p | 6s·8s·10s | Yes | 1.7 (~$0.68) | 6s · 10.2 credits (~$4.08) |
| LTX 2.5 Fast | 1080p | 10s·20s | Yes | 1.3 (~$0.52) | 10s · 13 credits (~$5.20) |
| Kling V3 Pro | 1080p | 5s·10s·15s | Yes | 1.68 (~$0.67) | 5s · 8.4 credits (~$3.36) |
| MiniMax H3 2K | 2K | 5s·10s·15s | Yes | 1.3 (~$0.52) | 5s · 6.5 credits (~$2.60) |
| Veo 3.1 Fast | 1080p | 4s·6s·8s | Yes | 1.5 (~$0.60) | 4s · 6 credits (~$2.40) |
Best for
Where to use LTX 2.5 Pro.
Every card links to the King AI tool for that job.
Sound-led shots
Anything where the noise is the point: machinery, weather, an instrument.
Fast drafting
Block the idea at a low rate without losing the audio you are judging.
Longer social cuts
Up to 20 seconds on the fast tier, at 1080p.
Photo animation with sound
Animate a still and get its ambience generated in the same pass.
How it works
Getting the most out of LTX 2.5 Pro.
Start on the fast tier
LTX 2.5 Fast costs 1.3 credits a second against Pro’s 1.7, at the same 1080p and with the same audio. At 10 seconds, a length both offer, a Fast draft is 13 credits and Pro is 17; for a clip under 10 seconds, only Pro offers one.
Write the sound
LTX generates audio with the picture, so name it: the hiss, the room, the one noise the shot is built around. A prompt that describes only the image gets generic ambience laid under it.
Use the fast tier for length
Only Fast reaches 20 seconds. A 20-second take there costs 26 credits — less than 10 seconds on Pro would cost you twice over.
Move to Pro for the finish
When the framing and the sound are right, re-run the identical prompt on the Pro tier. It is a new generation, so judge the take again before you use it.
Prompts
Three prompts that play to LTX 2.5 Pro's strengths.
Written for this engine, not swapped between pages. Each one opens the studio with LTX 2.5 Pro selected and the prompt already in the box — the cost shown is what one clip at the shortest length it offers will take off your balance.
Sound-led, in one pass
“A record needle drops onto vinyl in close-up: dust visible in the groove, the crackle before the first bar, a lamp glowing behind the turntable. Warm, shallow focus, static frame.”
6s · 10.2 credits (~$4.08)
Generate on LTX 2.5 Pro →One slow push-in
“A storm rolls across wheat fields in a single slow push-in, wind flattening the crop in waves, thunder building behind the ridge, the first raindrops finally hitting the lens.”
6s · 10.2 credits (~$4.08)
Generate on LTX 2.5 Pro →A draft that already has audio
“A welder’s mask flips down and the arc strikes, sparks fountaining across a dark workshop floor, the buzz and hiss filling the room. Low angle, tight framing, tungsten light.”
6s · 10.2 credits (~$4.08)
Generate on LTX 2.5 Pro →Proof
Same prompt, this engine.
One prompt was sent to seven engines from the same starting frame. This is what LTX 2.5 Pro did with it. The prompt, word for word: “A paper boat the size of a ship sails through a flooded cathedral at dawn, candle flames guttering as it passes, water lapping the stone, slow lateral dolly, 35mm, natural light, the sound of water and wind, continuous motion, no cuts, no new objects”
LTX 2.5 Pro, run on the prompt above at 1080p · 8s · 13.6 credits (~$5.44). Tap or scroll and the still becomes the clip.
Keep exploring
Related models & guides.
Same-prompt comparisons
Every flagship pair on one photo and one prompt, with what each engine costs.
ExplorePixVerse V6
1080p at 1.15 credits a second, and 84 of the app’s 202 one-tap effects.
ExploreVeo 3.1
Google's flagship video model — cinematic realism with native audio.
ExploreBest AI video generators — six compared
Six flagships, and what we would pick each one for.
ExploreFAQ
LTX 2.5 Pro, answered.
What is LTX 2.5?
LTX 2.5 is Lightricks’ video generation family. King AI carries four of its tiers — text-to-video and image-to-video, each at Pro and Fast — all outputting 1080p with audio generated alongside the frames.
How much does an LTX 2.5 video cost in King AI?
King AI bills per second. LTX 2.5 Pro costs 1.7 credits a second, so a six-second clip is 10.2 credits and a 10-second clip is 17. LTX 2.5 Fast costs 1.3 credits a second, which makes a ten-second draft 13 credits. In most countries, your first video is on us: new verified accounts get one five-second video on our lowest-cost video model, once. A six-second LTX 2.5 Pro run costs more than the first video on us, so it needs credits from a plan or credit pack.
What is the difference between LTX 2.5 Pro and LTX 2.5 Fast?
Rate and reach. Both output 1080p with audio. Pro costs 1.7 credits a second and offers 6, 8 or 10 seconds; Fast costs 1.3 and offers 10 or 20 seconds. Fast is the drafting tier and also the only way to get a long LTX take.
Does LTX 2.5 generate audio?
Yes, on every tier King AI carries, so even the cheapest LTX clip comes back with its sound.
How does LTX 2.5 compare with Kling V3 Pro?
Kling V3 Pro is cheaper per second — 1.68 credits against LTX 2.5 Pro’s 1.7 — but LTX’s fast tier runs to 20 seconds where Kling stops at 15. Kling adds a start-and-end-frame mode and a 4K tier. Run both on the same prompt and keep the winner.
Get started
Try LTX 2.5 Pro today.
In most countries, your first video is on us: new verified accounts get one five-second video on our lowest-cost video model, once. A six-second LTX 2.5 Pro run costs more than the first video on us, so it needs credits from a plan or credit pack.