Model Card: Iris-3B
Iris-3B: published by Sperid Labs on 2026-10-07 (arXiv 2610.09450), a 3B-parameter pixel-space diffusion transformer plus a frozen 4B Qwen3-VL-4B-Instruct text encoder, generating pixels directly with no VAE or latent space; GenEval 0.798 and DPG-Bench 86.52 (both at 1024px), matching Qwen-Image on OneIG-EN; but after fine-tuning, monocular depth estimation (AbsRel 0.071) only ties the latent FLUX.2 Klein model, which still uses a VAE, and 4x image restoration (LPIPS 0.292/PSNR 20.68) fails to beat it — the paper itself admits it found no significant downstream advantage from the pixel-space generative prior; weights and training code are fully open under Apache 2.0