Even GPT-2 passes most functional global workspace tests

tl;drAnthropic’s global workspace paper (Gurnee et al., 2026) proposes five functional tests for a global workspace and, using the Jacobian lens (J-lens), finds representations in Claude that pass all five. It also finds structure supporting this set of representations in Claude that global workspace theory predicts.We test these on GPT-2 small (124M) and find it passes the tests for verbal report, internal reasoning, flexible generalization, and selectivity, but fails directed modulation. We al...