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This page is generated from the source Markdown file so it can be viewed inside the MkDocs site.

📝 Page Status: Draft — sourced but not yet reviewed

  • Status: draft
  • Sources: 2
  • Relationships: 4
  • Research debt items: 3

Lyons v. OpenAI Foundation¶

Summary¶

Emily Lyons v. OpenAI Foundation, No. 3:25-cv-11037 (N.D. Cal.), is a pending diversity wrongful-death and product-liability action by the personal representative of Stein-Erik Soelberg. The complaint alleges that ChatGPT validated Soelberg’s paranoid delusions before he killed his mother, Suzanne Adams, and himself in Greenwich, Connecticut, in August 2025. On April 13, 2026, Chief Judge Richard Seeborg denied OpenAI’s motion to dismiss or stay the case under the Colorado River doctrine in light of a related California state action by Adams’s estate.

Verified Facts¶

  • On December 29, 2025, Emily Lyons, as administrator and personal representative of the estate of Stein-Erik Soelberg, filed a complaint in the Northern District of California against OpenAI Foundation, other OpenAI entities, and Samuel Altman.1
  • The complaint alleges that Soelberg killed Adams and himself after extended ChatGPT use, and that GPT-4o’s design confirmed and elaborated delusional beliefs about identified third parties, including his mother.1
  • The complaint pleads seven causes of action: strict product liability (design defect); strict liability (failure to warn); negligence (design defect); negligence (failure to warn); violation of California’s Unfair Competition Law; wrongful death; and a survival action.1
  • The court recites that Adams’s estate filed a related state-court action on December 11, 2025, and that on February 3, 2026, a petition coordinated twelve California state actions against ChatGPT, including the Adams suit.2
  • On April 13, 2026, the court denied defendants’ motion to dismiss or stay under Colorado River, holding there was substantial doubt that resolution of the Adams state case would resolve all issues in Lyons, including whether the model encouraged delusions and third-party harm causing Adams’s death versus delusions and self-harm causing Soelberg’s death.2

Historical Context¶

Lyons and the Adams estate action are the leading U.S. civil dockets alleging that a general-purpose chatbot validated psychosis and contributed to third-party homicide as well as suicide. The federal case remains independent of In re ChatGPT Product Liability Cases, which absorbed the Adams state suit.

Jurisdiction: Northern District of California. Authority level: district-court abstention order. Not a merits ruling on product defect, causation, or speech.2

The April 2026 order is narrow. It decides only that Colorado River abstention does not require staying or dismissing the federal estate’s claims because they are not necessarily coextensive with the mother’s estate’s state claims.2 Defendants may still raise First Amendment, Section 230, product-versus-service, and causation defenses on a later motion.

This page does not state that any defendant is liable.

Relationships¶

  • CASE-LYONS-V-OPENAI cites SRC-LYONS-V-OPENAI-MTD-2026.
  • CASE-LYONS-V-OPENAI related_to CASE-IN-RE-CHATGPT-PRODUCT-LIABILITY.
  • CASE-LYONS-V-OPENAI related_to TOPIC-AI-HARM-LITIGATION.
  • CASE-LYONS-V-OPENAI related_to TOPIC-AI-LITIGATION.

Sources¶

  1. SRC-LYONS-V-OPENAI-COMPLAINT: Lyons complaint (Dec. 29, 2025).
  2. SRC-LYONS-V-OPENAI-MTD-2026: Order denying motion to dismiss or stay (Apr. 13, 2026).

Research Debt¶

  • Add a dedicated CASE page for the Adams estate state action once a stable complaint PDF is captured.
  • Add later Lyons docket events after the April 2026 order (answer, discovery, any further motions).
  • Confirm the Adams state-court caption and number from a court record rather than the federal recitation alone.

Document metadata¶

  • Decision date: 2026-04-13
  • Last verified: 2026-09-03

  1. SRC-LYONS-V-OPENAI-COMPLAINT — Original complaint (Dec. 29, 2025). Plaintiff allegations; this page does not reproduce alleged chatbot transcripts or details of the deaths. â†©â†©â†©

  2. SRC-LYONS-V-OPENAI-MTD-2026 — Order denying motion to dismiss or stay (Apr. 13, 2026). Primary for the Colorado River ruling and the court’s recitation of the Adams action and February 2026 coordination. â†©â†©â†©â†©