# AI Open Weight Models AI models whose trained weights are publicly released, allowing anyone to download, run, fine-tune, and deploy them. "Open weight" is more precise than "open source" because most releases don't include training code or data. Key families: Llama (Meta), Mistral/Mixtral (Mistral AI), Gemma ([[Google DeepMind]]), Qwen (Alibaba), Phi (Microsoft), DeepSeek (see [[DeepSeek v4]] — currently the largest open-weights model at 1.6T total / 49B active params), [[GLM-5.2]] ([[Zhipu AI (Z.ai)]], 1M context, ~753B/40B; leading open-weight on the AA Intelligence Index at its June 2026 release), Kimi K2 ([[Moonshot AI]], see [[Kimi K2.6]] and [[Kimi K2.5]]), [[Granite 4.1|Granite]] (IBM — dense, enterprise-targeted, [[Apache 2.0 License|Apache 2.0]]). "Open weight" also says nothing about the license. Some releases are [[Apache 2.0 License|Apache 2.0]] or MIT. Others add restrictions: [[Mistral Large 4]] (October 2026) uses a modified MIT license that requires a separate commercial license for anyone who sells inference of the model as a service. [[Kimi K3.1 Pro]] (November 2026) does the same above $20M of revenue over 12 months, and adds a visible "Kimi K3.1-Pro" credit for products above 100M monthly users. Check the license before you build on a model. Origin is a filter too. Some companies and government buyers ban Chinese models outright, whatever the license and even when the weights run offline. That creates demand for US-made open weights, which is the gap [[Ripple-65B]] (November 2026, Apache 2.0) targets. Significance: democratizes AI access, enables local/private deployment, reduces vendor lock-in, enables community fine-tuning. Tension with safety: open weights can't be un-released, making misuse harder to prevent. ## Open-weight model notes Auto-populated from notes carrying `ai/open_weight`. Tag a note rather than editing this list to add a model. <!-- QueryToSerialize: LIST FROM #ai/open_weight AND !#type/quote AND !#type/creation/quote WHERE public_note = true SORT file.name ASC --> <!-- SerializedQuery: LIST FROM #ai/open_weight AND !#type/quote AND !#type/creation/quote WHERE public_note = true SORT file.name ASC --> - [[2026-04-21 Kimi K2.6, Qwen, and Gemma 4 - Local AI Is Catching Up]] - [[2026-08-01 Kimi K3, Qwen 3.8, and a Week That Reset the Open-Weight Frontier]] - [[Apertus]] - [[Baichuan]] - [[Bonsai 27B]] - [[Georgi Gerganov Machine Learning (GGML)]] - [[GPT-Generated Unified Format (GGUF)]] - [[Granite]] - [[Hermes]] - [[Kimi]] - [[Kimi K2.5]] - [[Kimi K3.1 Pro]] - [[llama.cpp]] - [[Mistral Large 4]] - [[Mistral Small 3]] - [[Mistral.rs]] - [[Moonshot AI]] - [[Nemotron 3.5 Transcribe]] - [[Nous Research]] - [[Qwen Image 2.1 Turbo]] - [[Ripple-65B]] - [[Safetensors]] - [[Stability AI]] - [[Timestral]] - [[Unsloth]] - [[Zhipu AI (Z.ai)]] <!-- SerializedQuery END --> ## References ## Related - [[Large Language Models (LLMs)]] - [[Knowledge Distillation]] - [[Low Rank Adapter (LoRA)]] - [[Atropos]] - [[Tinker]] - [[Axolotl]]