| --- |
| language: |
| - en |
| - de |
| - es |
| - fr |
| - ja |
| - ko |
| - zh |
| - it |
| - pt |
| license: other |
| license_name: ltx-2-community-license-agreement |
| license_link: https://github.com/Lightricks/LTX-2/blob/main/LICENSE.md |
| pipeline_tag: image-to-video |
| arxiv: 2601.03233 |
| tags: |
| - image-to-video |
| - text-to-video |
| - video-to-video |
| - image-text-to-video |
| - audio-to-video |
| - text-to-audio |
| - video-to-audio |
| - audio-to-audio |
| - text-to-audio-video |
| - image-to-audio-video |
| - image-text-to-audio-video |
| - multimodal |
| - ltx-video |
| - lightricks |
| - diffusion-single-file |
| pinned: true |
| extra_gated_description: >- |
| By clicking "Agree and Access" you acknowledge the [Privacy |
| Policy](https://static.lightricks.com/legal/Privacy%20Policy%20-%20LTX%20Platform.pdf) |
| and consent to receive offers and updates including targeted and personalized |
| advertisements. You can unsubscribe at any time. |
| extra_gated_button_content: Agree and Access |
| --- |
| |
| <!-- LTX-2.5 model card — license-first redesign. YAML frontmatter above kept intact. --> |
|
|
| <div class="lg:-mr-20 xl:-mr-24 2xl:-mr-36" style="border-radius:14px;overflow:hidden;"> |
| <div style="position:relative;line-height:0;font-size:0;height:300px;"> |
| <img src="https://huggingface.co/Lightricks/LTX-2.5/resolve/main/hf-hero-web.webp" alt="LTX-2.5 — Video, Audio & World Simulation" style="display:block;width:100%;height:100%;object-fit:cover;margin:0;vertical-align:top;" /> |
| <video autoplay muted loop playsinline style="position:absolute;inset:0;width:100%;height:100%;object-fit:cover;"> |
| <source src="https://videos.ltx.io/LTX-2/ltx-research/hf-hero-web.mp4" type="video/mp4" /> |
| <source src="https://videos.ltx.io/LTX-2/ltx-research/hf-hero-web.webm" type="video/webm" /> |
| </video> |
| </div> |
| <!-- light hero footer --> |
| <div class="dark:hidden" style="background-color:#eef1f5;padding:2rem 1.5rem 2.4rem;text-align:center;isolation:isolate;"> |
| <h1 style="color:#0a0a0a;margin:0 0 0.5rem;font-size:2rem;font-weight:700;letter-spacing:-0.01em;border:none;padding:0;">LTX-2.5 — Video, Audio & World Simulation</h1> |
| <p style="color:#555;margin:0 0 1.25rem;font-size:1.05rem;">Full control and customization — self-host on your infrastructure.</p> |
| <div style="display:flex;flex-wrap:wrap;justify-content:center;gap:0.5rem;"> |
| <a href="https://ltx.io" class="bg-white hover:bg-gray-200 transition-colors duration-150" style="color:#1c1c1c;border:1px solid #d0d3d8;border-radius:8px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">Homepage</a> |
| <a href="https://docs.ltx.io" class="bg-white hover:bg-gray-200 transition-colors duration-150" style="color:#1c1c1c;border:1px solid #d0d3d8;border-radius:8px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">Docs</a> |
| <a href="https://github.com/Lightricks/LTX-2" class="bg-white hover:bg-gray-200 transition-colors duration-150" style="color:#1c1c1c;border:1px solid #d0d3d8;border-radius:8px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">GitHub</a> |
| <a href="https://huggingface.co/papers/2601.03233" class="bg-white hover:bg-gray-200 transition-colors duration-150" style="color:#1c1c1c;border:1px solid #d0d3d8;border-radius:8px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">Research</a> |
| <a href="https://console.ltx.io/playground/" class="bg-white hover:bg-gray-200 transition-colors duration-150" style="color:#1c1c1c;border:1px solid #d0d3d8;border-radius:8px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">API Playground</a> |
| <a href="https://discord.gg/ltxplatform" class="bg-white hover:bg-gray-200 transition-colors duration-150" style="color:#1c1c1c;border:1px solid #d0d3d8;border-radius:8px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">Discord</a> |
| </div> |
| <div style="margin-top:1.5rem;"> |
| <a href="https://github.com/Lightricks/LTX-2/blob/main/LICENSE.md" class="bg-green-500 hover:brightness-110 transition-all duration-150" style="display:inline-block;color:#fff;border-radius:8px;padding:0.65rem 1.6rem;font-size:0.9rem;font-weight:700;text-decoration:none;">LTX License</a> |
| </div> |
| </div> |
| <!-- dark hero footer --> |
| <div class="hidden dark:block" style="background-color:#0a0a0a;padding:2rem 1.5rem 2.4rem;text-align:center;isolation:isolate;"> |
| <h1 style="color:#fff;margin:0 0 0.5rem;font-size:2rem;font-weight:700;letter-spacing:-0.01em;border:none;padding:0;">LTX-2.5 — Video, Audio & World Simulation</h1> |
| <p style="color:#c9c9c9;margin:0 0 1.25rem;font-size:1.05rem;">Full control and customization — self-host on your infrastructure.</p> |
| <div style="display:flex;flex-wrap:wrap;justify-content:center;gap:0.5rem;"> |
| <a href="https://ltx.io" class="bg-gray-800 hover:bg-gray-700 transition-colors duration-150" style="color:#fff;border:1px solid #2e2e2e;border-radius:8px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">Homepage</a> |
| <a href="https://docs.ltx.io" class="bg-gray-800 hover:bg-gray-700 transition-colors duration-150" style="color:#fff;border:1px solid #2e2e2e;border-radius:8px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">Docs</a> |
| <a href="https://github.com/Lightricks/LTX-2" class="bg-gray-800 hover:bg-gray-700 transition-colors duration-150" style="color:#fff;border:1px solid #2e2e2e;border-radius:8px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">GitHub</a> |
| <a href="https://huggingface.co/papers/2601.03233" class="bg-gray-800 hover:bg-gray-700 transition-colors duration-150" style="color:#fff;border:1px solid #2e2e2e;border-radius:8px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">Research</a> |
| <a href="https://console.ltx.io/playground/" class="bg-gray-800 hover:bg-gray-700 transition-colors duration-150" style="color:#fff;border:1px solid #2e2e2e;border-radius:8px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">API Playground</a> |
| <a href="https://discord.gg/ltxplatform" class="bg-gray-800 hover:bg-gray-700 transition-colors duration-150" style="color:#fff;border:1px solid #2e2e2e;border-radius:8px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">Discord</a> |
| </div> |
| <div style="margin-top:1.5rem;"> |
| <a href="https://github.com/Lightricks/LTX-2/blob/main/LICENSE.md" class="bg-green-500 hover:brightness-110 transition-all duration-150" style="display:inline-block;color:#fff;border-radius:8px;padding:0.65rem 1.6rem;font-size:0.9rem;font-weight:700;text-decoration:none;">LTX License</a> |
| </div> |
| </div> |
| </div> |
|
|
| <!-- LIGHT tier cards --> |
| <div class="dark:hidden lg:-mr-20 xl:-mr-24 2xl:-mr-36"> |
| <div style="display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1rem;"> |
| <div style="background:#ecf8f2;border:1px solid #d6e9de;border-radius:6px;padding:1.5rem 1.6rem;"> |
| <div style="width:44px;height:44px;border-radius:6px;background:#dceee4;display:flex;align-items:center;justify-content:center;margin:0 0 0.8rem;color:#1c1c1c;"><svg xmlns="http://www.w3.org/2000/svg" width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M16 20V4a2 2 0 0 0-2-2h-4a2 2 0 0 0-2 2v16"/><rect width="20" height="14" x="2" y="6" rx="2"/></svg></div> |
| <div style="font-size:1.3rem;font-weight:700;color:#0a0a0a;margin:0 0 0.6rem;line-height:1.35;">Under $10M annual revenue</div> |
| <p style="color:#333;font-size:1.05rem;margin:1.1rem 0;">Commercial and production use at no cost under the LTX-2.x Community License. Transfer of fine-tunes may require a paid license, in accordance with the LTX-2.x Community License.</p> |
| <a href="https://docs.ltx.io/open-source-model/getting-started/overview" class="bg-gray-900 hover:bg-gray-700 transition-colors duration-150" style="display:inline-block;color:#fff;border:1px solid #0a0a0a;border-radius:9999px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">Read the Documentation</a> |
| </div> |
| <div style="background:#f3eff9;border:1px solid #e0d8f0;border-radius:6px;padding:1.5rem 1.6rem;"> |
| <div style="width:44px;height:44px;border-radius:6px;background:#e6deef;display:flex;align-items:center;justify-content:center;margin:0 0 0.8rem;color:#1c1c1c;"><svg xmlns="http://www.w3.org/2000/svg" width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M3 21h18"/><path d="M5 21V5a2 2 0 0 1 2-2h6a2 2 0 0 1 2 2v16"/><path d="M15 21V9a1 1 0 0 1 1-1h3a2 2 0 0 1 2 2v11"/><path d="M9 7h2"/><path d="M9 11h2"/><path d="M9 15h2"/></svg></div> |
| <div style="font-size:1.3rem;font-weight:700;color:#0a0a0a;margin:0 0 0.6rem;line-height:1.35;">Over $10M annual revenue</div> |
| <p style="color:#333;font-size:1.05rem;margin:1.1rem 0;">Paid Commercial Use Agreement for LTX-2.x with full weights, engineering support, LoRAs, and flexible deployment options. To learn about all licensing options, talk to an expert.</p> |
| <a href="https://ltx.io/forms/ltx-contact-sales?kpi=licensing" class="bg-gray-900 hover:bg-gray-700 transition-colors duration-150" style="display:inline-block;color:#fff;border:1px solid #0a0a0a;border-radius:9999px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">Talk to a Commercial Licensing Expert</a> |
| </div> |
| </div> |
| </div> |
|
|
| <!-- DARK tier cards --> |
| <div class="hidden dark:block lg:-mr-20 xl:-mr-24 2xl:-mr-36"> |
| <div style="display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1rem;"> |
| <div style="background:#1a2622;border:1px solid #2a3a32;border-radius:6px;padding:1.5rem 1.6rem;"> |
| <div style="width:44px;height:44px;border-radius:6px;background:#22332c;display:flex;align-items:center;justify-content:center;margin:0 0 0.8rem;color:#fff;"><svg xmlns="http://www.w3.org/2000/svg" width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M16 20V4a2 2 0 0 0-2-2h-4a2 2 0 0 0-2 2v16"/><rect width="20" height="14" x="2" y="6" rx="2"/></svg></div> |
| <div style="font-size:1.3rem;font-weight:700;color:#fff;margin:0 0 0.6rem;line-height:1.35;">Under $10M annual revenue</div> |
| <p style="color:#c9ced6;font-size:1.05rem;margin:1.1rem 0;">Commercial and production use at no cost under the LTX-2.x Community License. Transfer of fine-tunes may require a paid license, in accordance with the LTX-2.x Community License.</p> |
| <a href="https://docs.ltx.io/open-source-model/getting-started/overview" class="bg-gray-50 hover:bg-gray-300 transition-colors duration-150" style="display:inline-block;color:#1c1c1c;border:1px solid #f8fafc;border-radius:9999px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">Read the Documentation</a> |
| </div> |
| <div style="background:#221a2e;border:1px solid #322a42;border-radius:6px;padding:1.5rem 1.6rem;"> |
| <div style="width:44px;height:44px;border-radius:6px;background:#2a2238;display:flex;align-items:center;justify-content:center;margin:0 0 0.8rem;color:#fff;"><svg xmlns="http://www.w3.org/2000/svg" width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M3 21h18"/><path d="M5 21V5a2 2 0 0 1 2-2h6a2 2 0 0 1 2 2v16"/><path d="M15 21V9a1 1 0 0 1 1-1h3a2 2 0 0 1 2 2v11"/><path d="M9 7h2"/><path d="M9 11h2"/><path d="M9 15h2"/></svg></div> |
| <div style="font-size:1.3rem;font-weight:700;color:#fff;margin:0 0 0.6rem;line-height:1.35;">Over $10M annual revenue</div> |
| <p style="color:#c9ced6;font-size:1.05rem;margin:1.1rem 0;">Paid Commercial Use Agreement for LTX-2.x with full weights, engineering support, LoRAs, and flexible deployment options. To learn about all licensing options, talk to an expert.</p> |
| <a href="https://ltx.io/forms/ltx-contact-sales?kpi=licensing" class="bg-gray-50 hover:bg-gray-300 transition-colors duration-150" style="display:inline-block;color:#1c1c1c;border:1px solid #f8fafc;border-radius:9999px;padding:0.5rem 1.1rem;font-size:0.85rem;font-weight:600;text-decoration:none;">Talk to a Commercial Licensing Expert</a> |
| </div> |
| </div> |
| </div> |
|
|
| --- |
|
|
| **LTX-2.5 Pre-Trained** is the base checkpoint produced during pre-training, before supervised fine-tuning and other post-training used for the main LTX-2.5 release. It is intended for researchers and developers creating specialized models and can be fine-tuned using the standard LTX Trainer. For general-purpose video generation, use the [main LTX-2.5 checkpoint](https://huggingface.co/Lightricks/LTX-2.5). |
|
|
|
|
|
|
|
|
| --- |
|
|
| # Model family & checkpoints |
|
|
| LTX-2.5 Pre-Trained consists of a single bundled checkpoint — the 22B DiT together with the video VAE, audio VAE, vocoder and duration head — plus the matching Gemma4 text encoder. |
|
|
| ## Transformers (DiT) |
|
|
| | File | Notes | |
| |------|-------| |
| | [`ltx-2.5-22b-pt-bf16.safetensors`](https://huggingface.co/Lightricks/LTX-2.5-Pre-Trained/blob/main/ltx-2.5-22b-pt-bf16.safetensors) | Pre-trained DiT (bf16), 43 GiB. Single-file bundle — also contains the video VAE, audio VAE, vocoder, duration head and text-embedding projections. | |
|
|
| ## Other components |
|
|
| | File | Notes | |
| |------|-------| |
| | [`ltx-2.5-22b-gemma4-12b/`](https://huggingface.co/Lightricks/LTX-2.5-Pre-Trained/tree/main/ltx-2.5-22b-gemma4-12b) | Gemma4 12B text encoder (bf16), HF Transformers format. Required — the checkpoint expects `gemma_version` `gemma4-12b-ltx-v1`. | |
| | Video VAE, audio VAE, vocoder, duration head | Bundled inside the checkpoint above — no separate files. | |
|
|
|
|
| --- |
|
|
| # Training & fine-tuning |
|
|
| This is the pre-training checkpoint, before the supervised fine-tuning and post-training used for the main LTX-2.5 release. Fine-tune it with the [LTX-2 Trainer](https://github.com/Lightricks/LTX-2/blob/main/packages/ltx-trainer/README.md), paired with the text encoder above. |
|
|
| --- |
|
|
| # Limitations |
|
|
| - This model is not intended or able to provide factual information. |
| - As a statistical model, this checkpoint may amplify existing societal biases. |
| - This checkpoint is not optimized in the same way as the main LTX-2.5 generation model. It does not include the supervised fine-tuning and subsequent post-training used for the main release. |
| - Fine-tuned derivatives may introduce additional capabilities, limitations and safety risks and should be evaluated independently. |
|
|
| --- |
|
|
| ## Citation |
|
|
| ```bibtex |
| @article{hacohen2025ltx2, |
| title={LTX-2: Efficient Joint Audio-Visual Foundation Model}, |
| author={HaCohen, Yoav and Brazowski, Benny and Chiprut, Nisan and Bitterman, Yaki and Kvochko, Andrew and Berkowitz, Avishai and Shalem, Daniel and Lifschitz, Daphna and Moshe, Dudu and Porat, Eitan and Richardson, Eitan and Guy Shiran and Itay Chachy and Jonathan Chetboun and Michael Finkelson and Michael Kupchick and Nir Zabari and Nitzan Guetta and Noa Kotler and Ofir Bibi and Ori Gordon and Poriya Panet and Roi Benita and Shahar Armon and Victor Kulikov and Yaron Inger and Yonatan Shiftan and Zeev Melumian and Zeev Farbman}, |
| journal={arXiv preprint arXiv:2601.03233}, |
| year={2026} |
| } |
| ``` |
