Krea 2 Medium

Krea 2 Medium is the budget version of the image model everyone was talking about in 2026. Same architecture family, same interface, lower price tier - which makes it the right place to find out whether Krea 2's aesthetic actually fits your project before you spend Large-tier credits on it. It's the image-node equivalent of testing a video prompt on Kling Standard before committing to Pro.

The node runs the model on Runware's cloud, so the whole "Krea 2 is heavy to run locally" problem evaporates. No checkpoint, no Qwen3-VL text encoder, no VAE - the pack sends the request and hands you back a native IMAGE tensor. Keep in mind this is the hosted Krea 2, not the open Krea-2-Raw weights, and Krea has confirmed the open and hosted versions aren't identical. For iterative work that rarely matters; for shipping, know what you're renting.

How it works

Same thin glue as every node in ComfyUI-Runware: the widgets become a request for model AIR krea:krea@2-medium with an imageInference task, the runware-sdk sends it over REST, and the image comes back as an IMAGE output for Preview Image or Save Image.

The inputs mirror the Large tier exactly:

• positivePrompt - natural language, long and specific; wrap in-image text in quotes.
• width / height - required, 1024 default.
• settings.creativity - raw, low, medium, high, default medium. raw is the undistilled Raw behavior; lower values hug the prompt, higher values let the model improvise.
• seed - reproducibility.
• numberResults - 1–20 variations; keep it low on the budget tier.
• advanced_json - for settings.moodboards when you want style steering.

There's also a watermark socket and the usual safety gate (off by default - the model's own default applies).

The output

One image socket, type IMAGE. Default output is JPG at quality 95; PNG for lossless. Nothing else to do.

Installing it

The pack install is a one-time thing for all these nodes:

cd ComfyUI/custom_nodes
git clone https://github.com/Runware/ComfyUI-Runware
pip install -r ComfyUI-Runware/requirements.txt

Restart, set your key in ComfyUI Settings → Runware API key (or RUNWARE_API_KEY, or runware auth login), and you're generating. Dependencies are light - SDK, pillow, soundfile - with zero model downloads.

Where people get burned

Judging Krea 2 by Medium renders, for one. Medium is the iteration tier; if the prompt idea is solid, the Large tier is where the detail lands. The other trap is forgetting this is a different model from the open weights - if you're tuning a prompt here and porting it to a local Krea-2-Raw setup, expect drift. And numberResults is the quiet credit-burner: twenty variations of "hmm, close" is a real receipt.