Midjourney's flagship reigned 357 days — its successor lasted 43

Midjourney does not publish a release cadence, but it does publish something more useful: for every generation it names the exact day the model appeared and the exact window in which it was the platform default. Put those dates in a row and the picture changes shape. V6 was released on 20 December 2023 and held the default slot from 14 February to 30 July 2024 — 167 days. V6.1 took over the same day it launched and kept the slot for 321 days, until 16 June 2025. V7, released on 3 April 2025, ruled from 17 June 2025 to 9 June 2026: 357 days, the longest reign in the line. Then V8.1 arrived on 14 April 2026, became default on 10 June and was replaced on 23 July — 43 days. That is eight times shorter than the version before it, and the sharpest break in Midjourney's history. The waiting room tells a second story. V6 spent 56 days between release and default status, V7 spent 75, V8.1 spent 57 — but V6.1 and V8.2 were promoted on the day they shipped, with no trial period at all. The pattern is not a steady drift toward faster testing; it alternates. The generation that never got promoted is V8.0. It launched on 17 March 2026 as an early-access alpha, lived exclusively on the Midjourney Alpha website, and was withdrawn on 24 July 2026 — the same day V8.2 became default. Its working life was 129 days, the shortest of any Midjourney generation, and it was never the version most users were served. Images made with it stay in user galleries; the version itself can no longer be selected. What these numbers do not prove: five data points are not a policy, and Midjourney has never stated one. A short default tenure can mean an accelerated roadmap or a version that underperformed, and the documentation says nothing about which. V8.2 has held the slot for 25 days and counting, so its own figure is still open. Older versions also remain selectable through the version parameter — losing the default slot is not a shutdown, and V6.1's upscalers and editor are still doing work underneath V7, V8.1 and V8.2 today. All dates in this piece come from Midjourney's own documentation; the intervals are our calculation.