Before using an open-weight AI model in a paid product or service, check the exact model repository and version, read its actual license, and review any separate usage policy or component terms. “Open-weight” means the weights are accessible; it does not, by itself, grant commercial-use rights.
1. Pin down the exact model and version
Start with the artifact you intend to deploy. Record the model owner, repository, model name, and exact revision or release. Model repositories can change, so a license check against a different version may not describe the copy you use.
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On Hugging Face, begin at the model repository and note the revision you plan to download. Its documentation explains that license information is specified in the README model card’s metadata. Hugging Face model card documentation describes that metadata, while the Hub licenses documentation discusses license information for repositories. (Use the repository’s actual metadata and linked terms; a label alone is not the agreement.)
2. Find and read the operative license
Inspect the model card’s license field and follow any linked license text. A repository may identify a standard license, name and link a custom license, or include a LICENSE file. Read the complete text that applies to the model version you selected rather than relying only on a short tag or summary.
As you read, identify who grants the rights, what materials are covered, which activities are permitted, and what conditions apply. Look specifically for:
- Whether commercial use is allowed, and whether any revenue, user, scale, or other threshold applies.
- Whether modification and fine-tuning are covered.
- Whether you may redistribute weights, derivatives, or an application that includes them, and whether hosting or providing inference has conditions.
- Attribution, copyright notices, or other downstream obligations.
- Prohibited uses, geographic limits, or a requirement to obtain separate permission.
These are review questions, not universal requirements: the answer depends on the specific license and related terms.
3. Check for policies and agreements beyond the license
Review the model card, the model owner’s official site, any gated-download flow, and linked policy pages. A license may grant copyright permissions while separate usage rules or contractual terms also govern access or use. Check whether those documents apply to your planned deployment and whether their terms have changed.
OpenAI’s gpt-oss is one specific example: OpenAI says the models use Apache 2.0, with commercial use subject to the separate gpt-oss usage policy. Its model card, dated August 5, 2025, identifies gpt-oss-120b and gpt-oss-20b as available under Apache 2.0 and that policy. OpenAI’s gpt-oss FAQ and gpt-oss model card are the relevant documents for that example; they do not establish terms for other models.
4. Review the components you will actually use
A model repository can include or point to more than model weights. Check licenses for associated code, datasets, tokenizers, adapters, and other bundled materials if your product uses or redistributes them. Hugging Face advises users to seek and respect licenses for project code or data, and its catalog covers materially different categories, including noncommercial Creative Commons, research-use, OpenRAIL, and model-specific terms. The catalog is a pointer to terms, not a substitute for reading the license that governs each relevant asset.
5. Match the terms to your deployment
Write down what the product will do, then check each activity against the applicable grant and conditions. These uses are not interchangeable:
- Internal evaluation: testing a model inside your organization may raise different questions from selling access to it.
- Paid application or hosted inference: providing a commercial product or service that uses the model is distinct from distributing its weights.
- Fine-tune: modifying the base model and deploying the resulting version requires checking terms for both the base model and any adapter or other assets involved.
- Weight redistribution: providing the original or modified weights to customers or the public makes redistribution and notice conditions particularly relevant.
For two candidate models, compare their commercial-use grants and thresholds, modification rights, redistribution and hosting conditions, attribution and downstream obligations, use restrictions and separate policies, component coverage, and the clarity and stability of their versioned terms. Do not infer permission from a model’s “open-weight” description.
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6. Keep a record and revisit it when things change
Save the model identifier and revision, the date you checked it, the model-card metadata, the license text or stable link, any linked usage policies, and a short explanation of how the terms fit the intended deployment. This is prudent recordkeeping; it is not a claim that every license requires a particular retention process. Repeat the check if you change model versions, components, or deployment design.
When to get legal advice
Ask qualified counsel to assess the actual terms and facts if the license is missing, contradictory, custom, ambiguous, or silent about an important activity—or if the commercial stakes are significant. The terms and their effect can depend on the specific model and circumstances; this guide does not determine jurisdiction-specific legal obligations or verify a model owner’s rights.
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