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Open-Weight Models

An open-weight model is an AI model whose trained weights are published for anyone to download. The weights are what the model learned in training. With a copy of them you can run the model on hardware you control and train it further on your own data.

Open weights are not the same as open source. Many publishers release the weights without the training data or code, and the license sets what you may do with the model. This library puts each model's full card, architecture, files, license and published evaluations on one page.

12,010Models
3,413Datasets
288Papers
7,298Publishers
12,421Sourced relationships

Updated 2026-10-21 · How the library is built

Most downloadedMost likedRecently updatedNameLargest

12,010 models, sorted by most downloaded.

Model · Robotics

b1k-2026-3more-ft1

Rena Tian

Selected checkpoint for the BEHAVIOR-1K 2026 submission. (IliaLarchenko/behavior-1k-solution, ~3B params, task-ID embeddings, no language prompt). - Checkpoint is params-only (no optimizer state): it can be served or used as an init, not --resumed. - params/ — orbax/ocdbt parameters - assets/b1k20263moretasks/normstats.json — normalization stats - CHECKPOINTMETADATA Serve with scripts/serveb1k.py --task-id 56 policy:checkpoint --policy.config pibehaviorb1k20263more --policy.dir (use --task-id 78 for task 78). Scored the 2026 leaderboard way: public instances 0-9 (ids 301-310), one rollout each, default 1.5x timeouts, task score = sum / 10. - Use this checkpoint for tasks 56 and 78. For task…

Open weights apache-2.0
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Model · Robotics

b1k-2026-task20-ft1

Rena Tian

Selected checkpoint for the BEHAVIOR-1K 2026 submission. (IliaLarchenko/behavior-1k-solution, ~3B params, task-ID embeddings, no language prompt). - Checkpoint is params-only (no optimizer state): it can be served or used as an init, not --resumed. - params/ — orbax/ocdbt parameters - assets/b1k2026task20/normstats.json — normalization stats - CHECKPOINTMETADATA Serve with scripts/serveb1k.py --task-id 20 policy:checkpoint --policy.config pibehaviorb1k2026task20 --policy.dir. Scored the 2026 leaderboard way: public instances 0-9 (ids 301-310), one rollout each, default 1.5x timeouts, task score = sum / 10. - Checkpoint choice, screened on held-out instances 311-315 (mean q): step 8000 =…

Open weights apache-2.0
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Model · Robotics

b1kcheckpoints

Ran Qi

Params-only checkpoints for offline evaluation. trainstate is not included, so these cannot be resumed from — inference/eval only. Single-task fine-tune of the 2025 winner's checkpoint2 (the official checkpoint covering task 1) on task 1 = pickinguptrash, using the 200 human demos plus 788 scripted recovery episodes from fastwalker1118/B1kRecovery (task1/Demo+Recovery). Planned 5 epochs; these are the checkpoints nearest the epoch boundaries (one epoch = 15,089 steps). actionloss is training-set loss only (no validation split, no rollouts yet). Single-task fine-tune of the 2025 winner's checkpoint1 (the official checkpoint covering task 2) on task 2 = puttingawayHalloweendecorations, using…

Open weights apache-2.0
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Model Collections

Hand-picked starting points, each with the reason it exists.

Collection · 4 entries

Models that fit on one accelerator

Models whose publisher-reported parameter count puts them within reach of a single accelerator at common precisions. Memory needed depends on precision and serving configuration, so treat the parameter count as the starting point, not the answer.

View collection

Open-Weight Models Explained

What is an open-weight model?

An AI model whose trained weights are published for anyone to download, so it can be run, tested and fine-tuned on hardware the user controls.

Is an open-weight model the same as open source?

Not always. Open weights means the trained model can be downloaded. Open source usually also means the training code and data are available and the license allows broad reuse. Many open-weight models release the weights only.

Can I use an open-weight model commercially?

It depends on the license. Apache 2.0 and MIT allow commercial use. Other licenses limit it, for example to non-commercial use or below a set number of users. Every model page here shows its license.

How much memory does an open-weight model need?

About two bytes per parameter at 16-bit precision, so a 7-billion-parameter model needs roughly 14 GB for its weights, plus memory for the context it processes. Each model page lists its parameter count and the size of its files.

Related SAVRN Research

The hub sits beside SAVRN's market data and infrastructure research: what models cost to run, and what it takes to run them.