ComfyUI KSampler Matrix Lab — Repository reference¶

Development line: project:comfyui-ksampler-matrix-lab · thread repository-reference
Last event: 2026-06-05 · 1 dated since 2026-06-05 · Researched: 2026-09-05 · confidence: medium

What it is¶

ComfyUI KSampler Matrix Lab — two ComfyUI nodes for artists and model evaluators: KSampler Matrix Lab compares sampler/scheduler combinations, Model Matrix Lab compares installed checkpoints. Limits: up to 9 sampler slots, 9 scheduler slots and 20 model slots; generation runs sequentially. Verdict: usable for controlled visual tests, but compatibility still depends on the local ComfyUI build, models and custom nodes.

Development line¶

• 2026-06-05 — ComfyUI KSampler Matrix Lab repository referenced. On 2026-06-05, this development line was linked to the GitHub repository for ComfyUI KSampler Matrix Lab. The dated link establishes a public repository reference for the project, but the post contents, repository state, capabilities, and release status have not been researched.

What changed¶

2026-06-05 — the extension was available as a custom-node package for labeled sampler/scheduler comparison grids; the creator’s public launch was dated 2026-06-04 and described same-seed, incrementing-seed, metadata-header and error-cell behavior.

How to use this¶

As of 2026-06-05, practitioners should inspect the linked repository before treating ComfyUI KSampler Matrix Lab as a usable workflow component; its installation, behavior, and maturity remain unverified.

1. Clone the repository into ComfyUI/custom_nodes, then restart ComfyUI. — https://github.com/btitkin/ComfyUI-KSampler-Matrix-Lab
2. Add KSampler Matrix Lab or Model Matrix Lab from the extension category and connect it to a normal generation workflow. — https://github.com/btitkin/ComfyUI-KSampler-Matrix-Lab
3. Connect the node’s single IMAGE output to Preview Image or Save Image; optionally load the included workflow JSON. — https://github.com/btitkin/ComfyUI-KSampler-Matrix-Lab

Best practices¶

• Keep prompt, model, latent and seed fixed when comparing sampler and scheduler settings; use increment-per-cell seed only when testing variation as well. — https://github.com/btitkin/ComfyUI-KSampler-Matrix-Lab
• Keep the matrix bounded with max_combinations; reduce selected samplers or schedulers before raising the limit. — https://www.runcomfy.com/comfyui-nodes/ComfyUI-KSampler-Matrix-Lab/k-sampler-matrix-lab
• Leave labels and the run header enabled when results will be reviewed or shared, and inspect error cells when continuation is enabled. — https://github.com/btitkin/ComfyUI-KSampler-Matrix-Lab

Superseded by this¶

• Nothing marked obsolete yet.

Still unknown¶

• The repository has no tagged releases, and the accessible first-party overview does not expose a reliable dated commit-by-commit change log after the initial June 2026 publication.
• No independent runtime test on a current local ComfyUI installation was available; current compatibility is therefore documented rather than verified in execution.

Sources¶

Agent brief¶

• Subject: project:comfyui-ksampler-matrix-lab, thread repository-reference, 1 dated events 2026-06-05 → 2026-06-05.
• Practical note: As of 2026-06-05, practitioners should inspect the linked repository before treating ComfyUI KSampler Matrix Lab as a usable workflow component; its installation, behavior, and maturity remain unverified.
• Confidence: medium. Dated supersedes above are the authority for what is obsolete.