# ComfyUI v0.42.1: what's new, verdict & setup Canonical: https://theagenticweekly.com/tools/comfyui · Released: 2026-10-18 · Last verified: 2026-10-26 · Evidence: Tested (smoke test, 2026-10-26, no LLM involved) · Vendor: Comfy Org · Official site: https://www.comfy.org/ > Node-graph engine for local and cloud image, video, audio and 3D generation. ## Verdict **The tool to learn if you want maximum control over open models on your own GPU; it has a learning curve.** Good for: - Power users who want to run open models locally - Artists building repeatable image or video workflows - People who want to mix local models with partner nodes Skip if: - You want a one-click consumer app - You do not have a capable GPU and do not want to use partner (paid) nodes Tested. Tested 2026-10-26 (America/Chicago). ComfyUI 0.42.0 installed in 17.42 s and its CPU-only server was ready in 30.1 s with 1014 node types, but we did not generate an image. Test environment: Linux x86_64 virtual machine (Debian 13), 8 vCPU, 15 GiB RAM, no GPU; no vendor account, login or API key. No language model was involved in this test. Not tested: Generating any image: no checkpoint was downloaded (the SD-Turbo file we considered is 5.2 GB, and the machine's free memory could not hold it); GPU use, custom nodes, the ComfyUI Manager, workflows from the web interface, and the browser UI; Speed of image generation on CPU or on a GPU. These are smoke tests, not a benchmark. Full log: /tests/comfyui. Test scope: - Kind and date: smoke test, 2026-10-26 (America/Chicago). Not a benchmark. - What we ran: ComfyUI 0.42.0 installed in 17.42 s and its CPU-only server was ready in 30.1 s with 1014 node types, but we did not generate an image. - Model used: none (no language model was involved) - Environment: Linux x86_64 virtual machine (Debian 13), 8 vCPU, 15 GiB RAM, no GPU; no vendor account, login or API key - Not tested: Generating any image: no checkpoint was downloaded (the SD-Turbo file we considered is 5.2 GB, and the machine's free memory could not hold it); GPU use, custom nodes, the ComfyUI Manager, workflows from the web interface, and the browser UI; Speed of image generation on CPU or on a GPU. Full test log (commands, versions, raw output): [ComfyUI ComfyUI 0.42.0 (commit cdf272f), PyTorch 2.14.1 CPU: our test log](https://theagenticweekly.com/tests/comfyui) Pricing: Not verified. We have not verified pricing for this tool; see the official site. ## Best for - [Best AI tool for images](https://theagenticweekly.com/best/image-generation) (#2): Most flexible option for open image models, with a large workflow ecosystem. - [Best AI tool for video](https://theagenticweekly.com/best/ai-video) (#4): Runs open video models locally and can call partner video models through nodes. ## What's new ComfyUI v0.42.0 adds a Krea 3 Image partner node, MOSS-image support and Qwen performance work; v0.42.1 the next day fixes crashes in the MOSS image template workflow. - v0.42.0 (Oct 18): Partner node for Krea 3 Image; node labels now say FLUX 3 Image. - v0.42.0: Support for MOSS-image and performance improvements for Qwen 3.x. - v0.42.0: Workflow templates updated several times, and retired Quiver Arrow 1.x models removed. - v0.42.1 (Oct 19): Fixes crashes some users hit running the MOSS image template workflow. ## How to set it up: Install ComfyUI with comfy-cli Steps come from the vendor's own pages or docs. We have not run them ourselves. 1. **Install the CLI.** The README documents comfy-cli. ``` pip install comfy-cli ``` 2. **Install ComfyUI.** Run the install command and follow the prompts. ``` comfy install ``` 3. **Start from a template.** Use the built-in workflow templates to generate your first image before you build graphs from scratch. ## Pros and cons Pros: - Huge model and workflow ecosystem - Runs locally; README claims it can run big models on as little as 4GB VRAM with 8GB RAM - Frequent releases Cons: - GPL-3.0 license has copyleft obligations for derivatives - Steep learning curve - Partner nodes use paid third-party models ## Alternatives - [Midjourney](https://theagenticweekly.com/tools/midjourney): Image (and video) generation with the alpha.midjourney.com web app. - [Runway](https://theagenticweekly.com/tools/runway): AI video and creative suite with an MCP server, Agent, and many partner models. - [Luma](https://theagenticweekly.com/tools/luma): AI video and image studio with its own Ray models and now Kling 4.0, all in one project board. - [FLUX (Black Forest Labs)](https://theagenticweekly.com/tools/black-forest-labs): Black Forest Labs' FLUX image models, available through an API with per-image pricing; the flux GitHub repository is Apache-2.0. - [Freepik AI](https://theagenticweekly.com/tools/freepik): Stock library with AI suite and credit plans; credits valid for 1 year. - [Ideogram](https://theagenticweekly.com/tools/ideogram): AI image generator with Plus, Pro and Team plans, pay-as-you-go credits at 1 cent each, and an API. - [Krea](https://theagenticweekly.com/tools/krea): Creative AI suite for images, videos and upscaling; Free plan with 5,000 units a month. - [Leonardo.Ai](https://theagenticweekly.com/tools/leonardo-ai): Image and video creation platform with a free tier, four individual plans, team seats and API pay-as-you-go. - [Recraft](https://theagenticweekly.com/tools/recraft): Text-to-image model and design platform for photorealism and vector output; V4.1 Flash is listed as the latest model. - [ChatGPT](https://theagenticweekly.com/tools/chatgpt): OpenAI's assistant for chat, writing, images, voice and agent-style work. - [Descript](https://theagenticweekly.com/tools/descript): AI video and audio editor where you edit by editing text; Free plan, paid plans measured in media hours and AI credits. - [HeyGen](https://theagenticweekly.com/tools/heygen): AI avatar video with a Free plan and paid tiers at $29, $49 and $149 a month. ## FAQ ### What is new in ComfyUI v0.42.0? A Krea 3 Image partner node, MOSS-image support, Qwen 3.x performance work and updated workflow templates. ### How do I install ComfyUI? pip install comfy-cli, then comfy install, per the README. ### Is ComfyUI free? The software is GPL-3.0 open source. Partner nodes that call closed models may charge you. ## What we have not verified - Hardware requirements in practice (README claims only) - Partner node pricing - Output quality (not tested) ## Sources - [ComfyUI v0.42.0 release](https://github.com/Comfy-Org/ComfyUI/releases/tag/v0.42.0) (fetched 2026-10-25) - [ComfyUI v0.42.1 release](https://github.com/Comfy-Org/ComfyUI/releases/tag/v0.42.1) (fetched 2026-10-25) - [README](https://github.com/Comfy-Org/ComfyUI) (fetched 2026-10-25) ## How to cite Agentic Weekly, "ComfyUI v0.42.1: what's new, verdict & setup", last updated 2026-10-26, https://theagenticweekly.com/tools/comfyui Keep the Reported or Tested label when you quote the verdict.