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IFM Releases PAN 2, a 29B-Parameter World Model for Simulative Reasoning

·2026.11.11 15:56

Key point

The model couples a Qwen3.5-9B language model with a 29B MMDiT diffusion backbone to predict video outcomes of actions.

Details

  • IFM released PAN 2, a general-purpose world model that simulates how the world changes in response to actions by generating video of up to 20 seconds.
  • The architecture uses a 29B-parameter MMDiT as the perceptual reasoning backbone, trained from scratch on hundreds of millions of videos, alongside a Qwen3.5-9B text encoder and Wan 2.2 VAE.
  • PAN 2 supports simulative reasoning, allowing agents to imagine outcomes of candidate actions before choosing among them.
  • The diffusion backbone is released as a single BF16 checkpoint supporting text-to-video and image-to-video tasks at 704x1248 resolution and 24 fps.
video-generationai-agentsifmworld-modelsdiffusion-modelspan2
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