The technology behind Midjourney V8.1
How the model works, based on public documentation and sourced evidence.
Midjourney V8.1 opened in alpha on April 14, 2026 and became the default model on June 11, 2026. Midjourney describes it as carrying the V7 aesthetic forward rather than replacing it, so the look people chose Midjourney for stays where it was while the mechanics underneath change.
The changes Midjourney lists are practical ones. HD mode runs three times faster and three times cheaper than it did, a standard image returns in about four seconds and an HD image in about twelve, and HD images come back at twice the dimensions of V7. Text rendering, meaning words set inside quotation marks, is better than in any previous version. Style references and personalization behave as they did in V7, and image prompts and image weight are back after a spell of being unavailable.
Two prompting tools came with the release: a Prompt Shortener that trims an overlong prompt down to what is doing the work, and a more detailed Describe that reads an image back as words. Midjourney's update page has since moved on to V8.2, published on July 24, 2026, so V8.1 is a fixed point in a line that keeps moving.
On Vidney V8.1 runs text to image and image to image, where image to image means one image prompt alongside the text. Midjourney's own parameters can be typed into the prompt, among them --s, --style raw, --iw, --sref and --oref, while the aspect ratio comes from the selector rather than --ar. Runs are standard quality in fast mode and return a single image for 18 credits. HD and Draft, variations, inpainting, background removal, retexture and niji are not open here, and the V7 page stays up.