Open-Weight Model Licences: What You Can Actually Ship
An open-weight licence decides what you may do with a published model, and three current licences show the range of terms. Mistral's modified MIT licence adds a service clause, Liquid's ends at a revenue line, and OpenMDW grants rights without restriction.
Key takeaways
- The Mistral Ecosystem Open-Weight License is a modified MIT licence, free to use, modify, fine-tune and commercialise, with a separate commercial licence for a model-as-a-service business.
- The LFM Open License v1.0 is based on Apache 2.0 and ends commercial rights above $10M annual revenue, with no user threshold and no copyleft.
- OpenMDW 1.1 grants permission to use the model materials without restriction and puts no obligations on outputs.
- The revenue threshold, the copyleft rule and the distribution terms are the clauses that usually decide whether you can ship.
- Read the licence for the specific model you use, keep notices intact and treat the terms as part of your product design.
Open weights are not the same as open terms. A model can publish its parameters and still restrict how you sell access to it, how much revenue you can earn before you owe a fee, or what you must do when you distribute it. The licence is the part of the launch that decides whether you can ship, and it is usually the part founders read last.
TL;DR
- Mistral's licence is a modified MIT licence with one clause aimed at model-as-a-service businesses (Mistral).
- The LFM Open License v1.0 is based on Apache 2.0 and ends commercial rights above $10M annual revenue (Liquid AI).
- OpenMDW 1.1 grants use "without restriction" and puts no obligations on outputs (OpenMDW).
- The clauses that matter most are the revenue threshold, the copyleft rule and the distribution notices.
- Read the licence for the exact model you ship, because a family name is not a licence.
Disclosure: ZeroRaised publishes this analysis and is a launch site for bootstrapped products. Facts come from the linked sources as checked on 30 Oct 2026; ZeroRaised has no commercial relationship with the companies named.
An open-weight licence is the legal agreement that sets what you may do with a model whose trained parameters have been published, including whether you may modify it, fine-tune it, redistribute it and sell products built on it.
What does the Mistral Ecosystem Open-Weight License allow?#
Mistral released the weights of Mistral Large 4, a 1 trillion parameter natively multimodal model, under the Mistral Ecosystem Open-Weight License (Mistral). It is a modified MIT licence, and it is free to use, modify, fine-tune and commercialise the model (Mistral).
The single condition is the one that catches people: operating a model-as-a-service business requires a separate commercial licence with Mistral (Mistral). That is a narrow restriction on a specific business model rather than a broad ban on commercial use. The model itself is large: about 1T total parameters, 49B active per token and a 1M token context (Hugging Face). The question is whether your product is a product or a resold endpoint. The analysis of the Mistral release digs into the benchmark and hosting side.
What is the catch in the LFM Open License?#
Liquid AI's LFM Open License v1.0 is based on Apache 2.0 and grants royalty-free, perpetual rights to use, modify and distribute the model (Liquid AI). Commercial use rights end if your company's annual revenue exceeds $10M, at which point you must buy a commercial licence (Liquid AI).
The details are friendlier than the headline. There is no user threshold, so serving many users does not trigger a fee (Liquid AI). There is no copyleft, so fine-tunes can stay proprietary, though attribution notices must be kept (Liquid AI). Research and qualified non-profit use has no threshold (Liquid AI). This lets small teams adopt the model without a sales call and charges the companies that grow past the line. The LFM3 licence breakdown covers the model side.
What does OpenMDW 1.1 grant?#
OpenMDW License 1.1 takes a different approach. It grants permission, free of charge, to deal in the model materials "without restriction", covering copyright, patent, database and trade secret rights (OpenMDW). If you distribute, you keep a copy of the agreement and the notices (OpenMDW). Your rights terminate if you sue claiming the materials infringe a patent or copyright, unless you are responding to a suit (OpenMDW).
The output terms matter for product builders: there are no restrictions or obligations on outputs, and the materials are provided as is, with you responsible for clearing third party rights (OpenMDW). NVIDIA uses this licence for Nemotron 3.5 Transcribe, according to the model card (Hugging Face).
How do the three licences compare?#
| Licence | What it grants | The condition that bites | Notes |
|---|---|---|---|
| Mistral Ecosystem Open-Weight License | Use, modify, fine-tune and commercialise | Separate commercial licence for a model-as-a-service business | Modified MIT (Mistral) |
| LFM Open License v1.0 | Royalty-free, perpetual use, modification and distribution | Commercial rights end above $10M annual revenue | Apache 2.0 based, no copyleft, attribution required (Liquid AI) |
| OpenMDW 1.1 | Use "without restriction" across copyright, patent, database and trade secret rights | Rights terminate if you sue claiming the materials infringe a patent or copyright | No obligations on outputs; keep agreement and notices (OpenMDW) |
None of these is a trap. The mistake is assuming that open weight means no conditions.
What should you check before you ship?#
- Name the exact model and version. A licence attaches to a model release, not to a family. Read the card for the checkpoint you deploy.
- Map your business model onto the clause. A product that uses a model is usually a different case from an endpoint that resells it. If you are near the line, get advice.
- Check the revenue and user thresholds. The LFM licence keys off revenue, not users, and exempts research and qualified non-profits (Liquid AI).
- Check the copyleft rule before fine-tuning. No copyleft means your fine-tune can stay private. A copyleft licence can force you to publish more than you planned.
- Keep notices and agreements. Distribution terms often require you to carry the licence and attribution with the model (OpenMDW) (Liquid AI).
- Check the output terms. OpenMDW puts no obligations on outputs, but you are still responsible for clearing third party rights (OpenMDW).
- Record the licence version and date. Terms change. Note what you agreed to when you shipped.
The open-weight versus closed comparison and the LLM API guide cover the capability and hosting decisions. The Kimi K3 open-weights analysis is a useful second example of how those choices look in practice.
What this means for bootstrapped founders#
- Treat the licence as a product constraint. It shapes who you can sell to and how, long before you write a line of code.
- Prefer clear terms over familiar names. "Modified MIT" and "based on Apache 2.0" still carry extra conditions.
- Model the upgrade path. If a revenue threshold applies, know what a commercial licence costs before you build a business that crosses it.
- Keep a model abstraction layer. Licences and prices change; a thin adapter lets you move without a rewrite.
- Do not rely on a summary. This post is analysis, not legal advice, and the licence text on the model card is the authority.
Where ZeroRaised fits#
ZeroRaised is a launch and discovery site for products built without institutional venture capital or accelerator equity. If you have shipped something on an open-weight model, you can submit your product. The pricing page explains the current options, and there are no promises of traffic or results.
If you want more analysis like this, join the ZeroRaised newsletter.
Sources#
Frequently asked questions
What is an open-weight licence?
An open-weight licence is the legal agreement that sets what you may do with a model whose trained parameters have been published. It covers use, modification, fine-tuning, distribution and commercialisation, and it can differ sharply from one model to the next.
Can I sell a product built on an open-weight model?
Usually yes, but the terms decide the shape. Mistral's licence permits commercial use with a service clause, the LFM Open License permits it below $10M annual revenue, and OpenMDW permits it without restriction. Check the specific licence for the model you ship.
What does the model-as-a-service clause mean?
Under the Mistral Ecosystem Open-Weight License, operating a model-as-a-service business requires a separate commercial licence with Mistral. A product that uses the model internally is a different case from an endpoint that sells access to the model itself, and the distinction is worth legal advice.
Does the LFM licence have a user limit?
No. The LFM Open License v1.0 has no user threshold. Its commercial rights end when your company's annual revenue exceeds $10M, at which point you need a commercial licence. Research and qualified non-profit use has no threshold.
Can I keep my fine-tunes private?
Under the LFM Open License there is no copyleft, so fine-tunes can stay proprietary. The licence still requires you to keep attribution notices. For any other model, read the distribution terms before you assume the same.