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Comfy Orgv0.42.1Tested (smoke test)

ComfyUI: what’s new in v0.42.1 and our verdict

Node-graph engine for local and cloud image, video, audio and 3D generation.

Official site

Release Ruler for ComfyUI: marked at its Tested release date on the timeline of every AI model we track.

At a glance

Evidence
Tested (smoke test)
Released
Oct 18, 2026
Last verified
Oct 26, 2026
Pricing
Not verified
Best for
images, video

Evidence and ranking

Evidence behind this verdict

  1. Sources read3 cited sources, latest fetched Oct 25, 2026. (done)
  2. Facts re-checkedLast verified Oct 26, 2026. (done)
  3. Run by usSmoke test on Oct 26, 2026 (scope below). (done)

Passed Test log result: Passed. Read the log

Where we rank it (editorial)

Editorial picks, not benchmark scores. How we rank.

Pricing: We have not verified pricing for this tool; see the official site.

Our 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.

Full test log with exact commands, versions and raw output: ComfyUI ComfyUI 0.42.0 (commit cdf272f), PyTorch 2.14.1 CPU: our test log.

Evidence
Tested (smoke test, 2026-10-26, no LLM involved). A smoke test is 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.
Date
(America/Chicago)

Best for

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 and comparisons

  • Midjourney: Image (and video) generation with the alpha.midjourney.com web app.
  • Runway: AI video and creative suite with an MCP server, Agent, and many partner models.
  • 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): Black Forest Labs' FLUX image models, available through an API with per-image pricing; the flux GitHub repository is Apache-2.0.

See all alternatives to ComfyUI

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

Last verified · Agentic Weekly

Part of the week of Oct 12, 2026 archive.

  • Runway: A strong choice if you want one place to drive many video, image and audio models from an agent; many items are paid-plan only.
  • Descript: AI video and audio editor where you edit by editing text; Free plan, paid plans measured in media hours and AI credits.
  • FLUX (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.

How to cite this page

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 a verdict. Plain-text version: https://theagenticweekly.com/tools/comfyui.md. More for AI assistants: /ai, /tools.json, /llms.txt.