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LTX 2.3 Fast vs LTX 2.3 Pro

This page compares LTX 2.3 Fast vs LTX 2.3 Pro 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.

6.7/10Score

LTX 2.3 Fast

Strengths: Speed & Stability, Pricing

7.1/10Score

LTX 2.3 Pro

Strengths: Controllability, Prompt Adherence

Scorecard (Side-by-Side)

Scores reflect quality and control on MaxVideoAI across 11 criteria.

LTX 2.3 FastCriteriaLTX 2.3 Pro

7.1

Prompt Adherence

iprompt alignment / instruction following

7.6

6.9

Visual Quality

iimage quality / aesthetic quality / realism / artifacts / flicker

7.4

7.2

Motion Realism

imotion smoothness / physics plausibility

7.5

5.9

Temporal Consistency

itemporal coherence / identity consistency

6.2

7.0

Human Fidelity

ifaces / hands / body realism

7.3

6.2

Text & UI Legibility

itext rendering / readability

6.5

7.3

Audio & Lip Sync

ilip sync quality / dialogue sync

7.8

6.0

Multi-Shot Sequencing

ishot-to-shot continuity / multi-shot

6.5

7.1

Controllability

icamera control / constraint following

7.9

9.0

Speed & Stability

ilatency / success rate

7.8

9.1

Pricing

iprice per second / credits / estimated cost

8.5

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: $0.05/s vs 1080p: $0.07/s).

Video-to-Video

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

Generate with

LTX 2.3 Fast

Full engine profile

Generate with

LTX 2.3 Pro

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 FastKey specLTX 2.3 Pro

1080p: $0.05/s

4K: $0.19/s

Pricing (MaxVideoAI)

1080p: $0.07/s

4K: $0.29/s

Text-to-Video

Image-to-Video

Video-to-Video

First/Last frame

Reference image / style reference

Reference video

4K (6–10s); 1080p for >10s routing

Max resolution

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

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

Max duration

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

16:9 / 9:16

Aspect ratios

16:9 generate / 9:16 generate

24 fps / 25 fps / 48 fps / 50 fps

FPS options

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

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 Fast

Placeholder example — prompt render coming soon

LTX 2.3 Pro

Placeholder example — prompt render coming soon

Open generator:Generate with LTX 2.3 Fast Generate with LTX 2.3 ProOpens 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 Fast

Placeholder example — prompt render coming soon

LTX 2.3 Pro

Placeholder example — prompt render coming soon

Open generator:Generate with LTX 2.3 Fast Generate with LTX 2.3 ProOpens 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 Fast

Placeholder example — prompt render coming soon

LTX 2.3 Pro

Placeholder example — prompt render coming soon

Open generator:Generate with LTX 2.3 Fast Generate with LTX 2.3 ProOpens 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 Fast vs LTX 2.3 Pro on MaxVideoAI (pricing, modes, specs, and why results differ).

What are LTX 2.3 Fast and LTX 2.3 Pro?

LTX 2.3 Fast and LTX 2.3 Pro 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 Fast or LTX 2.3 Pro?

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 Fast starts at 1080p: $0.05/s and LTX 2.3 Pro starts at 1080p: $0.07/s (see “Pricing (MaxVideoAI)” for details).

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

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

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 Not supported vs Supported (extend / retake workflows). 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 Not supported vs Supported (source clip for extend / retake).

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

Max output is 4K (6–10s); 1080p for >10s routing / 20s (>10s requires 1080p / 25 fps) for LTX 2.3 Fast and 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. Supported aspect ratios include 16:9 / 9:16 vs 16:9 generate / 9:16 generate (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-fast and /models/ltx-2-3-pro. You can also browse more outputs in the engine galleries.

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