LTX 2.3 Fast
6.7/10Editorial score
Higher-rated areas: Speed & reliability, Audio & lip sync
Compare engines
LTX 2.3 Fast vs LTX 2.5 Fast
Compare the Fast tiers: keep LTX 2.3 Fast for established 2.3 prompts, or explore LTX 2.5 Fast for native multi-shot and audio-led generation.
How to choose
Compare LTX 2.3 Fast and LTX 2.5 Fast by key specs, pricing, controls, and a scorecard across 10 criteria.
Quick verdict
Choose LTX 2.5 Fast for stronger drafts, native multishot, 4K and clips up to 20 seconds. Use 2.3 Fast only for legacy jobs.
LTX 2.5 Fast
7.9/10Editorial score
Higher-rated areas: Speed & reliability, Natural movement
See the models in action
Independent examples, with different prompts and settings.
LTX 2.3 Fast
No published video for this model yet. Explore the available examples.
Explore examplesLTX 2.5 Fast
No published video for this model yet. Explore the available examples.
Explore examplesCompare what matters
These are MaxVideoAI editorial assessments, not same-prompt test results. The dates below record score updates. MaxVideoAI sells access to the models it covers.
Score records last updated: LTX 2.3 Fast · LTX 2.5 Fast
How we benchmark| Criterion · 0–10 | LTX 2.3 Fast | LTX 2.5 Fast |
|---|---|---|
| Follows your promptHow closely the result follows the prompt. | LTX 2.3 Fast7.1/10 | LTX 2.5 Fast8.0/10 |
| Visual qualityDetail, lighting and visible artifacts. | LTX 2.3 Fast6.9/10 | LTX 2.5 Fast7.9/10 |
| Natural movementHow naturally subjects and cameras move. | LTX 2.3 Fast7.2/10 | LTX 2.5 Fast8.2/10 |
| Human appearanceFaces, hands and body movement. | LTX 2.3 Fast7.0/10 | LTX 2.5 Fast7.8/10 |
| Audio & lip syncSpeech, sound and mouth movement in sync. | LTX 2.3 Fast7.3/10 | LTX 2.5 Fast7.8/10 |
| Creative controlHow much direction the model follows. | LTX 2.3 Fast7.1/10 | LTX 2.5 Fast7.8/10 |
6 of 10 criteria shown10 of 10 criteria shownCompare the 4 other criteriaHide additional criteria
| Criterion · 0–10 | LTX 2.3 Fast | LTX 2.5 Fast |
|---|---|---|
| Consistency over timeWhether details hold together over time. | LTX 2.3 Fast5.9/10 | LTX 2.5 Fast7.5/10 |
| Readable textHow readable generated text and interfaces are. | LTX 2.3 Fast6.2/10 | LTX 2.5 Fast7.0/10 |
| Multi-shot continuityContinuity between different shots. | LTX 2.3 Fast6.0/10 | LTX 2.5 Fast7.2/10 |
| Speed & reliabilityGeneration speed and reliability. | LTX 2.3 Fast9.0/10 | LTX 2.5 Fast9.2/10 |
Generate with
LTX 2.3 Fast
Generate with
LTX 2.5 Fast
What will your video cost?
Compare prices by resolution. The final quote depends on your duration, mode and settings.
LTX 2.3 Fast
- Current price unavailable
The current quote could not be confirmed. Check your settings in the app before generating.
LTX 2.5 Fast
- Current price unavailable
The current quote could not be confirmed. Check your settings in the app before generating.
Your settings. Your quote. Before you generate.
USD estimate · snapshot generated
Formats, inputs and controls
Check duration, resolution, supported inputs and controls. Open each model’s guide for its full feature set.
New clip · maximum
- LTX 2.3 Fast
- 20 s
- LTX 2.5 Fast
- 20 s
Max resolution
- LTX 2.3 Fast
- 4K (6–10s); 1080p for >10s routing
- LTX 2.5 Fast
- 4K
Audio output
- LTX 2.3 Fast
- Supported
- LTX 2.5 Fast
- Supported
Compare all 17 specificationsClose the full specification tableCheck references, audio, camera controls and output formats.
| Key spec | LTX 2.3 Fast | LTX 2.5 Fast |
|---|---|---|
| Pricing (MaxVideoAI) | Current price unavailable | Current price unavailable |
| Text-to-Video | Supported | Supported |
| Image-to-Video | Supported | Supported |
| Video-to-Video | Not supported | Not exposed in current LTX 2.5 Fast endpoint set |
| First/Last frame | Supported (start + end image in I2V) | Supported (optional end frame) |
| Reference image / style reference | Supported (single start image; no separate style-reference stack) | Single start image plus optional end frame |
| Reference video | Not supported | Not exposed in current LTX 2.5 Fast endpoint set |
| Max resolution | 4K (6–10s); 1080p for >10s routing | 4K |
| New clip · maximum | 20 sText to video, Image to video: 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 s | 20 sText to video, Image to video: 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 s |
| Aspect ratios | 16:9 / 9:16 | 16:9 / 9:16 |
| FPS options | 24 fps / 25 fps / 48 fps / 50 fps | 24 / 25 / 48 / 50 |
| Output format | MP4 | MP4 |
| Audio output | Supported | Supported |
| Native audio generation | Supported | Supported |
| Lip sync | Supported | Supported through synchronized audio and audio-to-video workflows |
| Camera / motion controls | Prompt-based only | Dolly, jib, static and focus-shift presets |
| Watermark | No (MaxVideoAI) | No visible MaxVideoAI watermark |
Duration choices depend on mode and resolution; check the creation settings.
Capabilities available in MaxVideoAI. Provider sources below; their verification dates are not recorded here.
LTX 2.3 Fast: fal.ai (1) · fal.ai (2) · fal.ai (3)
LTX 2.5 Fast: docs.ltx.io · huggingface.co · fal.ai
Explore the models
11 questions to help you choose
FAQ
Quick answers about LTX 2.3 Fast vs LTX 2.5 Fast on MaxVideoAI (pricing, modes, specs, and why results differ).
Open a question to read the answer. One answer at a time.
Which is better: LTX 2.3 Fast or LTX 2.5 Fast?
Choose LTX 2.5 Fast for stronger drafts, native multishot, 4K and clips up to 20 seconds. Use 2.3 Fast only for legacy jobs.
Which is cheaper on MaxVideoAI?
- LTX 2.3 Fast — Current quote unavailable; check settings before generating..
- LTX 2.5 Fast — Current quote unavailable; check settings before generating..
- Compare equivalent settings. These are estimates in USD, not reserved quotes.
What are the biggest differences between LTX 2.3 Fast and LTX 2.5 Fast?
- Reference image / style reference — LTX 2.3 Fast: supported (single start image; no separate style-reference stack); LTX 2.5 Fast: Single start image plus optional end frame.
- Max resolution: LTX 2.3 Fast is 4K (6–10s); 1080p for >10s routing vs LTX 2.5 Fast is 4K.
Can I start from text, an image or a video?
- LTX 2.3 Fast — Text-to-Video: Supported; Image-to-Video: Supported; Video-to-Video: Not supported.
- LTX 2.5 Fast — Text-to-Video: Supported; Image-to-Video: Supported; Video-to-Video: Not exposed in current LTX 2.5 Fast endpoint set.
Can I use start and end frames or references?
- LTX 2.3 Fast — First/Last frame: Supported (start + end image in I2V); Reference image / style reference: Supported (single start image; no separate style-reference stack); Reference video: Not supported.
- LTX 2.5 Fast — First/Last frame: Supported (optional end frame); Reference image / style reference: Single start image plus optional end frame; Reference video: Not exposed in current LTX 2.5 Fast endpoint set.
What resolutions, durations and aspect ratios are available?
- LTX 2.3 Fast — Max resolution: 4K (6–10s); 1080p for >10s routing; New clip · maximum: 20 s. Text to video, Image to video: 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 s. Extension · added duration: Not supported. Aspect ratios: 16:9 / 9:16. Duration choices depend on mode and resolution; check the creation settings.
- LTX 2.5 Fast — Max resolution: 4K; New clip · maximum: 20 s. Text to video, Image to video: 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 s. Extension · added duration: Not supported. Aspect ratios: 16:9 / 9:16. Duration choices depend on mode and resolution; check the creation settings.
Can the models generate audio and lip sync?
- LTX 2.3 Fast — Audio output: Supported; Native audio generation: Supported; Lip sync: Supported.
- LTX 2.5 Fast — Audio output: Supported; Native audio generation: Supported; Lip sync: Supported through synchronized audio and audio-to-video workflows.
Does MaxVideoAI add a watermark?
- LTX 2.3 Fast — Watermark: No (MaxVideoAI).
- LTX 2.5 Fast — Watermark: No visible MaxVideoAI watermark.
Why can results differ between these models?
Models interpret instructions, visual references, and generation constraints differently.
Where can I find full specs, controls, and more prompt examples?
Open the full engine profiles for complete specs, controls, and more prompts: /models/ltx-2-3-fast and /models/ltx-2-5-fast. You can also browse more outputs in the engine galleries.
What are LTX 2.3 Fast and LTX 2.5 Fast?
LTX 2.3 Fast and LTX 2.5 Fast are AI video generation engines documented on MaxVideoAI. This page compares key specs, pricing, controls, and performance data shown above.