LTX 2.5 Fast
LTX 2.5 Fast is the speed-optimized tier of Lightricks' open-weight LTX 2.5 audio and video model, which fal describes as built for rapid iteration and previews. It takes a wider envelope than Pro: 6 to 20 seconds in two-second steps (or auto), at 720p, 1080p, 1440p or 2160p, and 24, 25, 48 or 50 frames a second, with native audio at every size. Like Pro it accepts an end frame on image-to-video and preset camera moves. The weights are published under the LTX-2.x Community License.
Anvisha Pai, Co-founder & CEO, Voyager
Lightricks
›What we asked for
A self-portrait of LTX 2.5 Fast: a sculptural paper bird glides through a sunlit workshop, slow tracking camera, paper rustling, warm natural light.
lightricks/ltx-2.5/text-to-video/fast
fps: 24, aspect_ratio: 16:9, resolution: 720p, duration: 6, generate_audio: true
returned 1280 by 720 pixels
At a glance
- Price
- $0.09 a second at 720p, $0.13 at 1080p, $0.19 at 1440p and $0.30 at 4K on fal, audio included, read October 22, 2026. Our six-second 720p clips cost $0.54 each.
- Measured wait
- 47 to 137 seconds from queue submission to a six-second 720p clip, across nine prompts in one batch: no quicker than Pro's 47 to 143. Not a service guarantee.
- Length
- 6 to 20 seconds in two-second steps, or auto, at 24 or 25 fps; 48 and 50 fps stop at 10 seconds.
- Audio
- Generated with the picture, on by default; it can be switched off.
- Open weights
- LTX 2.5 weights are on Hugging Face under the LTX-2.x Community License: free for organizations under $10 million a year in revenue.
Other LTX models: LTX 2.5 Pro, LTX 2.3. Compare all 3.
Anvisha's take
LTX 2.5 Fast was not faster than Pro in our batch: its six-second 720p clips took 47 to 137 seconds against Pro's 47 to 143, so in practice you are buying a lower price and a longer, bigger envelope, not speed. The look is close to Pro's. The talking woman is again a handheld selfie that laughs mid-line, the harbour push is steady over terracotta roofs, and the paper-bird self-portrait is the prettiest of the two tiers. The objects are worse. The title is 'MODA SUMMER SAMESIONS', then a date that reads 'Friday 12 Une', the pour-over went into a glass bowl with no dripper at all, and in image-to-video our dripper grew a pouring lip with coffee dribbling down the outside. The woodblock storm turned into static white paper peaks. At $0.54 a six-second clip it is a cheap way to try LTX 2.5; I would not use it for products or text. These are frame-based observations; audio was not scored by ear.
LTX 2.5 Fast real output: the same 9 clips every model gets
Every video model on this site gets the same 9 clips, so you can compare like with like. These are the clips LTX 2.5 Fast returned, one try each, nothing re-rolled or retouched. Each tile shows one frame of the clip until you press play. Generated on . The 9 clips took 47 to 137 seconds each and cost $4.86 in total.
A clean product shot that holds its shape through a full slow rotation.
›What we asked for
A matte black ceramic pour-over coffee dripper rotating slowly on a white turntable, soft studio light, seamless white background, product video, no text.
lightricks/ltx-2.5/text-to-video/fast
fps: 24, aspect_ratio: 16:9, resolution: 720p, duration: 6, generate_audio: true
returned 1280 by 720 pixels
A face, lip sync and a spoken line, where the model makes audio.
›What we asked for
A woman in her 40s with short grey hair stands in a bright kitchen, looks at the camera and says 'Good morning, the coffee is ready', natural window light, handheld feel, she smiles at the end.
lightricks/ltx-2.5/text-to-video/fast
fps: 24, aspect_ratio: 16:9, resolution: 720p, duration: 6, generate_audio: true
returned 1280 by 720 pixels
Set text that stays spelled correctly while it moves.
›What we asked for
A title card reading 'MODA SUMMER SESSIONS' animates in over slow-motion footage of a festival crowd at dusk, then a smaller line 'Friday 12 June' fades in beneath it. Bold condensed type, tangerine on navy.
lightricks/ltx-2.5/text-to-video/fast
fps: 24, aspect_ratio: 16:9, resolution: 720p, duration: 6, generate_audio: true
returned 1280 by 720 pixels
A steady drone push-in with stable geometry.
›What we asked for
Drone shot pushing slowly forward over a coastal town at sunrise, terracotta roofs, fishing boats in the harbour, long shadows, cinematic and steady.
lightricks/ltx-2.5/text-to-video/fast
fps: 24, aspect_ratio: 16:9, resolution: 720p, duration: 6, generate_audio: true
returned 1280 by 720 pixels
A spill in slow motion: does water behave like water.
›What we asked for
A glass of water tips over on a wooden table and spills in slow motion, water and three ice cubes sliding across the wood, macro lens, morning light.
lightricks/ltx-2.5/text-to-video/fast
fps: 24, aspect_ratio: 16:9, resolution: 720p, duration: 6, generate_audio: true
returned 1280 by 720 pixels
Hands, a kettle and a steady pour without extra fingers or teleporting objects.
›What we asked for
Close-up of hands pouring hot water from a gooseneck kettle in slow circles into a pour-over coffee dripper, steam rising, shallow depth of field, warm cafe light.
lightricks/ltx-2.5/text-to-video/fast
fps: 24, aspect_ratio: 16:9, resolution: 720p, duration: 6, generate_audio: true
returned 1280 by 720 pixels
Many people and objects moving at once without merging.
›What we asked for
A crowded Saturday farmers market seen from slightly above, shoppers with tote bags, a dog on a leash, a busker with a guitar, bunting swaying, late morning light, gentle camera drift.
lightricks/ltx-2.5/text-to-video/fast
fps: 24, aspect_ratio: 16:9, resolution: 720p, duration: 6, generate_audio: true
returned 1280 by 720 pixels
A named style held across every frame rather than drifting to photoreal.
›What we asked for
A lighthouse on a rocky cliff in a storm, in the style of a Japanese ukiyo-e woodblock print, waves crashing in flat colour with visible wood grain, animated like moving paper cutouts.
lightricks/ltx-2.5/text-to-video/fast
fps: 24, aspect_ratio: 16:9, resolution: 720p, duration: 6, generate_audio: true
returned 1280 by 720 pixels
Bring a still product photo to life without changing the product.
›What we asked for
The coffee dripper slowly fills as coffee drips through it, steam rising, the camera drifting gently around it, the dripper itself unchanged. (starting from The Nano Banana Pro product shot from the image fixture set.)
lightricks/ltx-2.5/image-to-video/fast
fps: 24, aspect_ratio: auto, resolution: 720p, duration: 6, generate_audio: true
returned 1280 by 720 pixels
How the cost under each picture was worked out: fal LTX 2.5 Fast $0.09/second at 720p, audio included (fal.ai/models/lightricks/ltx-2.5/text-to-video/fast, read 2026-10-22; the pricing API reports only $0.01 per unit) for the 6 seconds requested; fal does not return the charge.
Compare LTX 2.5 Fast
LTX 2.5 Fast pricing
| Where | Unit | Price | Source |
|---|---|---|---|
| fal | Second at 720p Audio included; the same on image-to-video. fal's pricing API reports only $0.01 per unit; the per-second rates are from the model page. | $0.09 | fal model page, read |
| fal | Second at 1080p | $0.13 | fal model page, read |
| fal | Second at 1440p | $0.19 | fal model page, read |
| fal | Second at 4K | $0.30 | fal model page, read |
| Voyager | Second at 1080p 13 credits a second at 1080p, 1 credit for 1¢ of what fal charges. On every paid plan; Free has no video. | $0.13 | Voyager pricing, read |
Is LTX 2.5 Fast free?
The fal endpoints are paid per second of video. The weights are free to download and run for organizations under $10 million in annual revenue.
- •Hugging Face: LTX-2.5 weights under the LTX-2.x Community License.
- •fal: per second by resolution, no free allowance found.
LTX-2.5 on Hugging Face, read
Where to use LTX 2.5 Fast
- fal, text-to-video · Hosted API and playground; the endpoint used for eight of the clips below.
- fal, image-to-video · First frame plus an optional end frame; used for the image-to-video clip.
- Open weights · Lightricks' published checkpoints, for running locally or fine-tuning.
- Voyager · Runs inside Voyager, the agent for creative work, on Voyager credits on every paid plan, or with your own fal key.
Voyager
Run LTX 2.5 Fast inside Voyager
Voyager is an agent for creative work that runs every model in this reference, LTX 2.5 Fast included. Brief it, and it picks the model, makes the thing and hands back something you can edit. Create an account to get started.
What we noticed running LTX 2.5 Fast
- •'MODA SUMMER SAMESIONS' first, then the second word drops away and the date reads 'Friday June' and 'Friday 12 Une'. See the animated title card clip.
- •Our dripper grew a pouring lip on its rim, and coffee runs down the outside from it. See the image to video clip.
- •The kettle pours into a glass bowl of grounds on a wooden stand: no dripper, no filter. See the hands at work clip.
- •The waves are static white paper peaks under a sketched stone lighthouse; the clip reads as a paper cut-out, not a woodblock print, and nothing crashes. See the specific art style clip.
- •A black bowl with a wavy rim, cropped tight, grows a spout by the last frame; its sound peaks at minus 78 dB, effectively silent. See the product turntable clip.
LTX 2.5 Fast limits and API parameters
| Limit | Value |
|---|---|
| Duration | 6 to 20 seconds in two-second steps, or auto; 720p to 2160p. At 48 or 50 fps the ceiling is 10 seconds. fal API schema, read |
| Output size | Every clip came back at 1280 by 720, 24 frames a second, 6.04 seconds long, including the square product photo with aspect_ratio on auto. fal API schema, read |
›Every setting, for developers
fal (lightricks/ltx-2.5/text-to-video/fast)
fal API schema, read
| Parameter | Type | Values | Default |
|---|---|---|---|
| prompt | string | Up to 5,000 characters Required. | |
| duration | enum | 6, 8, 10, 12, 14, 16, 18, 20, auto | auto |
| resolution | enum | 720p, 1080p, 1440p, 2160p | 1080p |
| fps | enum | 24, 25, 48, 50 48 and 50 fps allow up to 10 seconds at 720p and 1080p. | 25 |
| aspect_ratio | enum | 16:9, 9:16 | 16:9 |
| generate_audio | boolean | true, false | true |
| camera_motion | enum | dolly_in, dolly_out, dolly_left, dolly_right, jib_up, jib_down, static, focus_shift Optional; not used for our clips. |
LTX 2.5 Fast image-to-video
fal API schema, read
| Parameter | Type | Values | Default |
|---|---|---|---|
| image_url | URL | Image Required; the first frame. | |
| end_image_url | URL | Image Optional; makes a transition to this last frame. | |
| aspect_ratio | enum | auto, 16:9, 9:16 | auto |
What LTX 2.5 Fast will not make
The hosted endpoints apply fal's content checks; none of our nine prompts was refused. The open weights carry Lightricks' own acceptable-use terms in the LTX-2.x Community License.
LTX-2.5 on Hugging Face, read
Alternatives to LTX 2.5 Fast
Frequently asked questions
How much does LTX 2.5 Fast cost?
On fal, $0.09 a second at 720p, $0.13 at 1080p, $0.19 at 1440p and $0.30 at 4K, audio included, read October 22, 2026. A six-second 720p clip is $0.54. In Voyager it is 13 credits a second at 1080p on any paid plan.
Is LTX 2.5 Fast faster than Pro?
Not in our batch. Nine six-second 720p clips took 47 to 137 seconds on Fast and 47 to 143 on Pro, submitted at the same time. Queue time is included, so a quieter moment could differ.
Can LTX 2.5 Fast make 4K?
Yes. Fast renders at 720p, 1080p, 1440p or 2160p; Pro stops at 1080p. We ran both at 720p.
How this page is made
Prices, limits and settings are read from the linked vendor and host pages on the dates shown. Every picture was generated by us through fal with the request shown under it, and the original files are kept unedited. A generation that failed is shown as a failure. Model and vendor names are used to identify the products; no vendor imagery appears on this page.
