Midjourney sued by artists in class action for copyright infringement
A class action lawsuit was filed by artists alleging that Midjourney used copyrighted works without authorization to train its AI. The suit claims systemic infringement of intellectual property rights.
Midjourney's training mechanism allegedly systematized the unauthorized ingestion of copyrighted art to enable style mimicry.
Key facts
- What
- A class action lawsuit was filed by artists alleging that Midjourney used copyrighted works without authorization to train its AI.
- Incident date
- Jan 13, 2023
- Who
- Midjourney, Inc.
- Failure mode
- Policy Violation
- AI surface
- Chatbot
- Severity
- High
What happened
On January 13, 2023, artists Sarah Andersen, Kelly McKernan, and Karla Ortiz filed a class action lawsuit against Midjourney, Stability AI, and DeviantArt. They alleged that the companies scraped copyrighted images from the internet to train generative AI models without consent or compensation. The legal action seeks damages and a halt to the unauthorized use of artist works.
What broke inside the model
- 01 · TriggerA prompt pushes against a deployment boundary.
- 02 · Model stepThe model produces the disallowed output.
- 03 · Control gapNo enforcement blocks it at generation time.
- 04 · FailureThe output crosses the policy line.
- 05 · ConsequenceA limit the business set is breached in public.
The output crosses a policy boundary the deployment had defined.
The lawsuit alleges the AI training pipeline ingested copyrighted material without securing licenses from creators, producing a model capable of mimicking specific artistic styles based on what plaintiffs describe as unauthorized intellectual property.
What it cost
Sources
- Court FilingAndersen v. Stability AI Ltd., 3:23-cv-00201courtlistener.com
- PressArtists File Lawsuit Against Stability AI, Midjourney, and DeviantArtartnews.com
Cite this entry
https://failureindex.ai/failures/midjourney-sued-artists-class-action-copyrightAI Failure Index. "Midjourney sued by artists in class action for copyright infringement" (FI-0523). Realm Labs. https://failureindex.ai/failures/midjourney-sued-artists-class-action-copyright (indexed Jun 16, 2026).Data fields CC-BY 4.0, prose citation permitted. Incident ID FI-0523. Full dataset at /data.
Note from Realm Labs, the Index steward
How Realm would have caught this
- Prism
- OmniGuard
Realm compares what the model is about to output or do against the policy that governs the deployment, in real time, and can deny or redact the action before it takes effect, which is the gap an after-the-fact review never closes in time.