Alibaba Group shares fell to a 16-month low on 25 June 2026 following accusations from AI company Anthropic PBC that Alibaba had illicitly accessed its Claude AI model. The underlying allegation, first reported on 24 June 2026, stems from a letter sent by Anthropic and obtained by CNBC, which claims Alibaba conducted the largest known distillation attack on its AI models, using thousands of fraudulent accounts to extract capabilities without authorisation and describing the conduct as brazen and illicit.
Alibaba Group's US-listed shares (BABA) and its other listed equity (ALBAF) declined to 16-month lows on the session following the publication of the accusations, reflecting the direct exposure of those instruments to the reputational and regulatory consequences of the allegation.
The accusations centre on AI model distillation, a technique by which a third party attempts to replicate the capabilities of a proprietary model by extracting its outputs at scale. Anthropic's letter frames the activity as a deliberate and large-scale intellectual property violation rather than incidental misuse. The incident has drawn attention to data security and IP enforcement mechanisms in commercial AI development, particularly where access is mediated through API interfaces susceptible to account-based circumvention.
Sources: Bloomberg Markets, Cnbc TOP