LTX 2.3 Series: The Professional Video Suite

Last updated: April 30, 2026

The Lightricks LTX 2.3 series is a comprehensive professional-grade video suite designed for high-fidelity creation and surgical post-production. From rapid prototyping with the Fast tier to high-resolution cinematic sequences with the Pro engine, this suite provides creators with unparalleled control over motion, duration, and content refinement.

1. LTX 2.3 Pro: High-Fidelity Creation

The LTX 2.3 Pro model is the flagship of the suite, engineered for maximum visual quality and complex motion synchronization.

  • Cinematic Controls: Beyond standard prompting, users can input both a First Frame and an End Frame to direct specific motion transitions.

  • Technical Specifications:

    • Resolution: Supports professional standards including 1080p, 2k, and 4k.

    • Frame Rate: Flexible options ranging from 24 FPS to ultra-smooth 50 FPS.

    • Duration: Adjustable clips of 6, 8, or 10 seconds.

  • Camera Motion: A dedicated selector provides eight distinct cinematic movements, including Dolly (In/Out/Left/Right), Jib (Up/Down), Static, and Focus Shift.

2. LTX 2.3 Fast: Speed-Optimized Iteration

The LTX 2.3 Fast model is the high-performance workhorse of the suite, designed for maximum efficiency.

  • Fast Model: This model generates video content at incredible speeds, making it ideal for high-volume production and mobile-first workflows.

  • Synchronized Audio: Despite its focus on speed, it produces videos with native synchronized audio for immediate use.

  • Prototyping Power: It is the definitive choice for rapid prototyping and testing various prompts or compositions before committing to a high-fidelity render.

3. LTX 2.3 Pro Extend Video: Seamless Lengthening

The LTX 2.3 Pro Extend Video model is designed to add duration to existing footage without losing style or structural consistency.

  • Continuation Logic: By uploading an Input Video and providing a prompt, the engine generates high-fidelity continuation frames.

  • Extend Mode: Creators can choose to add duration specifically to the End (or beginning) of a clip to build out longer narrative sequences.

4. LTX 2.3 Pro Retake: Surgical Editing

For precise adjustments to existing assets, the LTX 2.3 Pro Retake engine allows for granular "reshooting" of specific video segments.

  • Multimodal Replacement: The engine offers three distinct Retake Modes:

    1. Replace Audio: Swap out soundscapes while keeping the visuals intact.

    2. Replace Video: Re-generate visual elements while maintaining the original audio.

    3. Replace Audio and Video: A complete overhaul of a specific segment.

  • Timeline Precision: Users can define Start Time and Duration for the retake, ensuring only the necessary portion of the 1080p clip is altered.

5. LTX 2.3 Pro Audio to Video: Sound-Led Motion

The LTX 2.3 Pro Audio to Video model generates video where uploaded audio sets the pace and energy. Use it when rhythm, dialogue timing, or musical feel should steer the picture.

  • Audio-first workflow: Upload an Audio file (**2 to 20 seconds**). The model uses that track to drive the clip. Speech cadence shapes pacing; music or ambience can influence how dynamic the motion feels.

  • Visual intent: Add an optional First Frame image, or describe the scene in a Prompt (up to 2048 characters) when you do not supply an image. If there is no first frame, a prompt is required so the model knows what to render.

  • Guidance: Tune Guidance Scale from 1 to 50 so the output follows your text more or less strictly. Defaults in the product differ for text-led runs versus image-led runs (check the control panel for the active default on your setup).

Model ID (API and integrations): model_ltx-2-3-pro-audio-to-video

Conclusion

The LTX 2.3 Series represents a significant shift toward production-ready AI video. By offering a dedicated Fast tier for iteration and a robust Pro suite for high-resolution generation and surgical editing, Lightricks provides a complete end-to-end pipeline. Whether you are extending a cinematic shot with Pro Extend or fixing a specific visual detail with Pro Retake, the LTX 2.3 suite delivers the precision required for professional digital storytelling.