AI Legal Cases

X.AI Corp., et al. v. OpenAI, Inc., et al.

Court of Appeals for the Ninth Circuit · Docket 26-4486

Active Litigation

Court
Court of Appeals for the Ninth Circuit
Docket
26-4486
Filed
July 15, 2026
Category
trade secrets
Plaintiffs
X.AI Corp., et al.
Defendants
OpenAI, Inc., et al.
Current status
Filed; docket monitoring active, no development recorded yet by this tracker
Docket and filings
View on CourtListener

Latest development · July 22, 2026

NOTICE OF APPEARANCE by LeElle Bruerea Slifer for Appellant X.AI Corp., Appellant X.AI LLC. [Entered: 07/22/2026 08:41 AM]

Executive summary

This case is tracked against its live court docket. A written summary has not been published yet; the docket facts above are current as of the last check.

Models, datasets, and materials at issue

Docket timeline

  • July 22, 2026

    ADDED Counsel for Appellant LeElle Bruerea Slifer [Entered: 07/22/2026 09:26 AM] Docket #9 →

  • July 22, 2026

    NOTICE OF APPEARANCE by LeElle Bruerea Slifer for Appellant X.AI Corp., Appellant X.AI LLC. [Entered: 07/22/2026 08:41 AM] Docket #8 →

  • July 20, 2026

    ADDED Counsel for Appellee Rachel Miller-Ziegler [Entered: 07/20/2026 02:19 PM] Docket #7 →

  • July 20, 2026

    MEDIATION QUESTIONNAIRE filed by Appellant X.AI Corp., Appellant X.AI LLC. To submit pertinent confidential information directly to the Circuit Mediators, please email ca09_mediation@ca9.uscourts.gov and include the case name and number in the subject line. Confidential submissions may include any Docket #6 →

  • July 20, 2026

    NOTICE OF APPEARANCE by Rachel Miller-Ziegler for Appellee OpenAI Global, LLC, Appellee OpenAI OpCo, LLC, Appellee OpenAI, Inc.. [Entered: 07/20/2026 12:05 PM] Docket #5 →

  • July 15, 2026

    CASE OPENED. A copy of your notice of appeal / petition filed in 3:25-cv-08133-RFL has been received in the Clerk's office of the United States Court of Appeals for the Ninth Circuit. The U.S. Court of Appeals docket number 26-4486 has been assigned to this case. All communications with the court mu Docket #1 →

  • July 15, 2026

    ADDED Counsel for Appellant Martha Banner Banks [Entered: 07/15/2026 10:49 AM] Docket #4 →

  • July 15, 2026

    SCHEDULE NOTICE. Appeal Opening Brief (No Transcript Due) (Appellant) 8/24/2026, Appeal Answering Brief (No Transcript Due) (Appellee) 9/23/2026, Mediation Questionnaire due (Appellant) 7/20/2026. For appeal no. 26-4486, 3:25-cv-08133-RFL. All briefs shall be served and filed pursuant to FRAP 31 an Docket #2 →

  • July 15, 2026

    NOTICE OF APPEARANCE by Martha Banner Banks for Appellant X.AI Corp., Appellant X.AI LLC. [Entered: 07/15/2026 10:37 AM] Docket #3 →

Docket entries sync nightly from CourtListener and the RECAP Archive. Full filings are one click away on the linked docket.

Facts on this page were last verified against the docket on August 2, 2026. See how we track these cases, or return to all tracked cases.

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