Anthropic Commercial Terms: no training of competing AI models, and no help to a third party that does (Anthropic Commercial Terms of Service (effective 17 June 2025), section D.4 (Use Restrictions))
A business customer of Anthropic may not use Claude to train competing AI models, and may not support a third party that tries to. Handing Claude's output to a buyer that trains its own models is the case a holder should check before licensing.
Dated 30 Oct 2026Source checked 30 Oct 2026Basis: primary text
In the source's own words
“Customer may not and must not attempt to (a) access the Services to build a competing product or service, including to train competing AI models or resell the Services except as expressly approved by Anthropic; (b) reverse engineer or duplicate the Services; or (c) support any third party’s attempt at any of the conduct restricted in this sentence.”
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