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AI video: models, tools and AI editing

What changed in AI video generation and editing: new models and their open weights, ComfyUI releases, the APIs that opened and the ones that closed. Every entry names its source and the day we checked it.

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LTX-2.5: VRAM and file sizes

What Lightricks asks for to run the LTX-2.5 AI video model locally: 32 GB of VRAM, 32 GB of RAM and 100 GB of disk, and why. Every checkpoint's size from the Hugging Face repository, and which set fits which GPU.

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LTX-2 v1.5.0

Lightricks released v1.5.0 of the LTX-2 code that runs the open LTX-2.5 AI video model on 18 October 2026: image conditioning now says whether a frame is replaced or only guides, keyframe interpolation moved into the main two-stage pipeline, and fp8 matrix maths speeds up GPUs of compute capability 8.9 and newer. Outputs are no longer bit-identical to earlier releases.

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Runway MCP: sound and voice

Runway's MCP server, which lets an AI agent drive Runway's tools, gained sound in mid-October 2026: Mirelo SFX 2.0 writes a separate effects track for an AI video clip from a description, and Fish Audio Drama 3 turns a script into a voiceover in seven voices. BiRefNet v2 background removal arrived the same week. All three need a paid plan.