Nikon strips Ning Xu of first place for generative AI
Nikon has stripped optical engineer Ning Xu of the first-place prize in its 2026 Small World in Motion microscopic video competition, reversing the results after determining that the winning entry violated contest rules against generative artificial intelligence.
The Disqualification and Shift in Standings
The decision shifts the top honor in the international competition to Nguyen Nam Nhat. Nhat submitted a recording featuring a small roundworm alongside a single-celled organism of the genus Dileptus, according to Ars Technica. The BBC reported the top cash award at 3,000 dollars.
Following the disqualification and subsequent re-ranking, Benedikt Pleyer of Germany advanced to second place with a recording of jellyfish larvae suspended in water droplets, and Andrew Moore of the Howard Hughes Medical Institute, in the United States, moved into third place with a synchronized video capture of cell division.
Anatomy of a Disputed Video
The controversy centers on Xu’s submission. It purported to show the beating cilia of an airway in a child diagnosed with primary ciliary dyskinesia, a rare genetic respiratory disorder.
Before the disqualification, questions regarding the video’s authenticity surfaced on professional networks and academic platforms. Beth Cimini proposed in a LinkedIn discussion hosted by the official Nikon Small World account that raw, pre-processed source files for all winning entries should be made accessible to verify alterations against final submissions.
Scientific reviewers challenged visible anomalies within Xu’s footage. Hirst stated that he was not surprised by the disqualification because, as he affirmed, he knew immediately that the video was a fabrication, basing his assessment on his professional experience examining samples related to the diagnosis of the condition and noting that he has spent 20 years diagnosing primary ciliary dyskinesia by analyzing waveform, length, size, and shape of cells and cilia.
Nikon Disqualifies Video for Using Generative AI
Nikon announced the disqualification on October 9, 2026, following a formal reevaluation of the video, its accompanying documentation, and consultations with members of the contest jury. In a statement reported by PetaPixel, the company clarified that the ruling addressed strictly the technical eligibility of the submission under established contest guidelines and did not constitute a judgment on the participant’s professional reputation, scientific contributions, or intent. The company concluded that the use of generative artificial intelligence in the composition of the video infringed the rules of its microscopic image contest, specifying that the decision was based solely on the eligibility of the submitted video according to the established rules set for this contest.
The regulation prohibiting generative AI tools in the competition has been in place for 15 years. The rule explicitly bans videos produced using artificial intelligence and reserves the right for organizers to request original source files for verification.
The Defense of the Workflow
Xu defended the workflow in statements covered by Nature and Gizmodo. The engineer acknowledged that an unsupervised neural network model was applied to grayscale reconstruction data during post-processing to visually separate and color morphological structures.
At the same time, Xu maintained that the process fell within permitted rules and denied that the algorithm generated the experimental footage, the cilia themselves, or their movement. Xu had maintained that the use of AI complied with the rules, which permit the enhancement of source data, according to The New York Times in Spanish.
Revising Protocols for Scientific Imaging
Nikon stated that it will review the rules and evaluation protocols governing both the Small World and Small World in Motion competitions ahead of future editions. This comes as industry debates continue regarding the boundary between digital image enhancement and generative synthesis in scientific imaging.