Best Free Image-to-3D Model in 2026: TripoSR vs Hunyuan3D vs TRELLIS

This is the dimension the word "free" hides, and for anyone searching "free unrestricted image to 3D" it is the one that matters most. All three models are free to download, but free and unrestricted are not the same thing. TripoSR is plain MIT: use it, modify it, sell what you make, no user cap, no regional carve-out, no strings. TRELLIS is essentially tied with it, MIT for the model and the majority of the code, with the one caveat that a couple of its rendering submodules carry other licenses, so a fully clean commercial stack takes a quick dependency check.

Hunyuan3D is the outlier, and it is important to be clear-eyed about it. Its weights ship under the Tencent Hunyuan 3D 2.1 Community License, which is not MIT. Two clauses matter: if your product crosses 1 million monthly active users you must request a separate license that Tencent may or may not grant, and, notably, the license's territory explicitly excludes the European Union, the United Kingdom, and South Korea. So Hunyuan3D is free to download but not unrestricted, and for an EU or UK builder that regional exclusion can be a hard stop no matter how good the model is. If "free and no strings" is what you actually need, TripoSR's plain MIT is the cleanest answer here, with TRELLIS a close second.

Nobody here ships an independent, apples-to-apples benchmark you can just trust, so treat every "best quality" line (ours included) as a starting point, not proof. What you can compare is how each one is built. Hunyuan3D is the quality leader on paper: it runs a two-stage pipeline, a diffusion transformer for the shape (Hunyuan3D-DiT) and a separate multi-view model that paints PBR materials onto it (Hunyuan3D-Paint), and since version 2.1 those materials are real albedo, metallic, and roughness maps rather than baked-on color. Its meshes are described as holeless, which is what you want for a clean asset.

TRELLIS is strong too, and unusually flexible, but Microsoft is honest that it "excels at artistic-style 3D assets" and has "limited capability" on photorealistic real-world objects, and its textured mesh gets its appearance by baking from the Gaussian output rather than a dedicated material pipeline. TripoSR is the honest weak link on quality: it reconstructs geometry from a single view and outputs vertex colors only, with no PBR materials and no separate texture-synthesis pass, and Stability itself now points users to its faster, game-ready successor SF3D. If a production-ready textured mesh is the whole point, Hunyuan3D wins this one, and it is not close.

Speed is TripoSR's home turf, and it is a real, structural advantage, not a marketing line. TripoSR is a feed-forward reconstruction model: one pass through the network turns a single image into a mesh, and the paper and repo both put that at under 0.5 seconds on an NVIDIA A100. There is no diffusion sampling loop to wait on. That is literally why the name exists.

The other two are heavier by design. Hunyuan3D and TRELLIS are diffusion and flow-based, multi-step models, and neither publishes a clean per-asset latency, so we will not invent one. What we can say is that a two-stage shape-then-paint pipeline (Hunyuan3D) or a multi-step flow model (TRELLIS) is inherently far from sub-second, which is why Hunyuan3D ships distilled Turbo and Fast variants specifically to cut steps. If your loop is generate, glance, iterate, TripoSR is the one that keeps up. The honest caveat: that sub-second number is raw model inference on a top-tier GPU, so add background removal and slower hardware and your real end-to-end time grows.

This is where "free" meets your actual GPU, and it is the difference between free-in-theory and free-you-can-run. TripoSR needs about 6 GB of VRAM for a single image and falls back to CPU when no CUDA device is present, so it runs on modest, older, or laptop-class cards. That is a genuine advantage: it is the one most people can run for free on hardware they already own.

The others ask for more. TRELLIS states a 16 GB GPU as the minimum and is Linux and CUDA focused, with no official Windows support. Hunyuan3D 2.1 needs about 10 GB for shape generation alone and about 29 GB for the full shape-and-texture pipeline, which puts a complete textured result out of reach on most consumer cards, though the lighter 2mini variant helps if you have less memory. So the practical ranking is clean: TripoSR runs almost anywhere, TRELLIS wants a 16 GB card, and Hunyuan3D wants a big one for its best output.

If your pipeline needs more than a single textured mesh, TRELLIS is the most flexible tool here by a wide margin. Its Structured Latent representation decodes one result into three different outputs: a textured polygonal mesh (GLB), 3D Gaussians for splatting, or a radiance field, and it ships both image-to-3D and text-to-3D models. Nothing else in this comparison gives you Gaussians, a NeRF, and a mesh from the same generation, all for free.

Hunyuan3D is mesh-focused but still broad: it exports GLB and OBJ, accepts single images or multi-view input through its 2mv variant, and has a texture-only mode that paints materials onto a mesh you already have. Its open weights are image-conditioned, though, so text-to-3D lives on the hosted platform, not in the released model. TripoSR is the narrowest of the three on purpose: a single image in, one mesh out as OBJ or GLB, with an optional baked-texture UV. No text input, no multi-view, no alternative representations. That simplicity is the trade for its speed and small footprint.

The best free model is the one you can actually get running, and here the trade is between simplicity and momentum. TripoSR is the simplest to run: a single image, about 6 GB of VRAM, a ready Hugging Face Space, and a Gradio app, so you can be generating for free in minutes. The catch is that it is the oldest and smallest ecosystem of the three, its ComfyUI support is community-provided rather than official, and Stability now steers users toward SF3D.

Hunyuan3D has the most momentum: the biggest star count of the three, several variants (mini, multi-view, distilled Turbo and Fast), active community ComfyUI wrappers, and an official hosted platform if you do not want to run it locally at all. TRELLIS sits in the middle, a strong repo with an official Hugging Face demo Space and both image and text models, but no first-party ComfyUI node and no hosted product. If you want the richest tooling and the most active project, Hunyuan3D is the pick; if you want the shortest path from zero to a free mesh, TripoSR is.