The video path reserves a model's VRAM estimate for its whole load window so a
concurrent load sees the card as spoken-for. The image path registered only a
Tasks-page entry, so for as long as a load took, the card looked free.

Measured 2026-10-28: Krea-2-RealDream held 18.8 GiB of a 23.56 GiB card for the
194 s of its load, ensure_vram_for granted a CrisperWhisper reservation against
VRAM that was already gone, and every captioned scene of a concurrent compose
answered "CUDA out of memory. Tried to allocate 86.00 MiB". Both ends had been
fixed in isolation -- the STT path reserves, the worker releases -- and neither
helped, because the model they were negotiating over never declared itself.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014T3rZnLhydX9QqUcfBbqLu