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LTX 2.3 Pro vs LTX 2.3 Fast

This page compares LTX 2.3 Pro vs LTX 2.3 Fast on MaxVideoAI using the same prompts, side-by-side renders, key specs, and a scorecard across 11 criteria. Use it to shortlist the best fit — then open each engine profile for full specs and prompt examples.

7.1/10Score

LTX 2.3 Pro

Strengths: Controllability, Prompt Adherence

6.7/10Score

LTX 2.3 Fast

Strengths: Speed & Stability, Pricing

Scorecard (Side-by-Side)

Scores reflect quality and control on MaxVideoAI across 11 criteria.

LTX 2.3 ProCriteriaLTX 2.3 Fast

7.6

Prompt Adherence

iprompt alignment / instruction following

7.1

7.4

Visual Quality

iimage quality / aesthetic quality / realism / artifacts / flicker

6.9

7.5

Motion Realism

imotion smoothness / physics plausibility

7.2

6.2

Temporal Consistency

itemporal coherence / identity consistency

5.9

7.3

Human Fidelity

ifaces / hands / body realism

7.0

6.5

Text & UI Legibility

itext rendering / readability

6.2

7.8

Audio & Lip Sync

ilip sync quality / dialogue sync

7.3

6.5

Multi-Shot Sequencing

ishot-to-shot continuity / multi-shot

6.0

7.9

Controllability

icamera control / constraint following

7.1

7.8

Speed & Stability

ilatency / success rate

9.0

8.5

Pricing

iprice per second / credits / estimated cost

9.1

Winner summary

Leads on scorecard

LTX 2.3 Pro leads on 9/11 (best: Controllability, Prompt Adherence).

Cheaper on MaxVideoAI

Cheaper: LTX 2.3 Fast (1080p: $0.07/s vs 1080p: $0.05/s).

Video-to-Video

Video-to-Video: LTX 2.3 Pro (Supported (extend / retake workflows) vs Not supported).

Generate with

LTX 2.3 Pro

Full engine profile

Generate with

LTX 2.3 Fast

Full engine profile

Key Specs (Side-by-Side)

Compare key AI video model specs side-by-side (pricing, inputs, resolution, duration, aspect ratios, audio, and core controls). This is a high-level snapshot — see the full engine profile for the complete feature set and prompt examples.

LTX 2.3 ProKey specLTX 2.3 Fast

1080p: $0.07/s

4K: $0.29/s

Pricing (MaxVideoAI)

1080p: $0.05/s

4K: $0.19/s

Text-to-Video

Image-to-Video

Video-to-Video

First/Last frame

Reference image / style reference

Reference video

4K on T2V/I2V generate; workflow-specific limits for Audio/Extend/Retake

Max resolution

4K (6–10s); 1080p for >10s routing

Generate 6–10s; Audio/Extend/Retake up to 20s

Max duration

20s (>10s requires 1080p / 25 fps)

16:9 generate / 9:16 generate

Aspect ratios

16:9 / 9:16

24 fps generate / 25 fps generate / 48 fps generate / 50 fps generate

FPS options

24 fps / 25 fps / 48 fps / 50 fps

MP4

Output format

MP4

Audio output

Native audio generation

Lip sync

Prompt-based only

Camera / motion controls

Prompt-based only

No (SanShengAI)

Watermark

No (SanShengAI)

Showdown (same prompt)

Side-by-side renders from the same prompt on MaxVideoAI. Prompts are identical; outputs may vary by model.

Showing up to 3 prompt pairs for clarity.

Fast Motion + Physics (16:9)

What it tests: Motion Realism + Temporal Consistency + Visual Quality

Prompt

Source prompts stay in English to keep the same test across engines.

LTX 2.3 Pro

Placeholder example — prompt render coming soon

LTX 2.3 Fast

Placeholder example — prompt render coming soon

Open generator:Generate with LTX 2.3 Pro Generate with LTX 2.3 FastOpens the generator with this model.

UGC Talking Head + Lip Sync (9:16)

What it tests: Human Fidelity + Audio/Lip Sync + Prompt Adherence

Prompt

Source prompts stay in English to keep the same test across engines.

LTX 2.3 Pro

Placeholder example — prompt render coming soon

LTX 2.3 Fast

Placeholder example — prompt render coming soon

Open generator:Generate with LTX 2.3 Pro Generate with LTX 2.3 FastOpens the generator with this model.

Hands + Product Demo + On-screen Text

What it tests: Hands/Fingers + Text & UI Legibility + Prompt Adherence

Prompt

Source prompts stay in English to keep the same test across engines.

LTX 2.3 Pro

Placeholder example — prompt render coming soon

LTX 2.3 Fast

Placeholder example — prompt render coming soon

Open generator:Generate with LTX 2.3 Pro Generate with LTX 2.3 FastOpens the generator with this model.

This side-by-side AI video comparison uses identical prompts to highlight differences in motion, realism, human fidelity, and text legibility. For full specs, controls, and more prompt examples, open each engine profile.

Related comparisons

Explore a few more popular side-by-side matchups.

LTX 2.3 Pro vs Google Veo 3.1 LTX Video 2.0 Pro vs Google Veo 3.1 LTX Video 2.0 Pro vs OpenAI Sora 2

FAQ

Quick answers about LTX 2.3 Pro vs LTX 2.3 Fast on MaxVideoAI (pricing, modes, specs, and why results differ).

What are LTX 2.3 Pro and LTX 2.3 Fast?

LTX 2.3 Pro and LTX 2.3 Fast are AI video generation engines available on MaxVideoAI. This page compares them side-by-side using the same prompts, key specs, and performance data shown above.

Which is better: LTX 2.3 Pro or LTX 2.3 Fast?

It depends on your workflow. Use the scorecard and the “same prompt” showdowns to compare prompt adherence, motion realism, human fidelity, and text legibility — then open each engine profile for full details.

Which is cheaper on MaxVideoAI?

Pricing varies by engine and settings (duration, resolution, audio). Currently, LTX 2.3 Pro starts at 1080p: $0.07/s and LTX 2.3 Fast starts at 1080p: $0.05/s (see “Pricing (MaxVideoAI)” for details).

What are the biggest differences between LTX 2.3 Pro and LTX 2.3 Fast?

Reference video: LTX 2.3 Pro is supported (source clip for extend / retake) vs LTX 2.3 Fast is not supported.
Max resolution: LTX 2.3 Pro is 4K on T2V/I2V generate; workflow-specific limits for Audio/Extend/Retake vs LTX 2.3 Fast is 4K (6–10s); 1080p for >10s routing.

Do they support Text-to-Video / Image-to-Video / Video-to-Video?

On MaxVideoAI: Text-to-Video is Supported vs Supported; Image-to-Video is Supported vs Supported; Video-to-Video is Supported (extend / retake workflows) vs Not supported. Some fields may still be under validation.

Do they support First/Last frame or references?

First/Last frame is Supported (start + end image in I2V) vs Supported (start + end image in I2V). Reference image/style is Supported (single start image; no separate style-reference stack) vs Supported (single start image; no separate style-reference stack); Reference video is Supported (source clip for extend / retake) vs Not supported.

What are the max resolution, duration, and aspect ratios?

Max output is 4K on T2V/I2V generate; workflow-specific limits for Audio/Extend/Retake / Generate 6–10s; Audio/Extend/Retake up to 20s for LTX 2.3 Pro and 4K (6–10s); 1080p for >10s routing / 20s (>10s requires 1080p / 25 fps) for LTX 2.3 Fast. Supported aspect ratios include 16:9 generate / 9:16 generate vs 16:9 / 9:16 (see Key Specs for the full list).

Do they support audio generation and lip sync?

Audio output is Supported vs Supported. Native audio generation is Supported vs Supported, and lip sync is Supported vs Supported (some fields may still be under validation).

Does MaxVideoAI add a watermark?

No. MaxVideoAI exports are watermark-free (“Watermark: No (MaxVideoAI)”).

Why do results look different with the same prompt?

Even with identical prompts, models interpret instructions differently and use different training data and generation strategies. That’s why the Showdown section exists: same prompt, side-by-side outputs.

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-pro and /models/ltx-2-3-fast. You can also browse more outputs in the engine galleries.

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