Big week for open AI, with 25+ notable open-weight drops across every modality

Big week for open AI, with 25+ notable open-weight drops across every modality (from Victor M on 𝕏)

Victor M summarized 25+ open-weight model releases in one week, including NVIDIA Nemotron 3 Ultra, a 550B hybrid Mamba-MoE with 55B active parameters and a 1M-token context window.

Why it matters: HKR-H/K/R all pass: the story combines a 25+ open-weight wave with NVIDIA’s 550B, 1M-context Nemotron. Reddit/X sourcing keeps it in the 78-84 band, not p1.