What open source licence is more free? GPL or BSD?

Claude Opus 4.6

Vote: BSD

The BSD license is more free in the sense that it imposes fewer restrictions on what users can do with the software. Under BSD, you can take the code, modify it, and redistribute it under any license you choose — including proprietary, closed-source licenses. The only requirement is typically attribution. The GPL, by contrast, is a **copyleft** license. While it aims to protect user freedom by ensuring that derivative works remain open source, it does so by imposing a significant restriction: any distributed derivative work must also be licensed under the GPL. This is a condition that limits what licensees can do with the code. The distinction comes down to how you define "free." If "free" means "fewest restrictions on the licensee," then BSD wins clearly. It gives you maximum permissiveness to do whatever you want with the code. Richard Stallman and the FSF argue that GPL is more free because it preserves freedom *for all downstream users*. But that preservation comes at the cost of restricting the immediate licensee's choices. In the broader open-source and software licensing community, BSD-style licenses are commonly referred to as "permissive" licenses precisely because they grant more permissions with fewer strings attached. By the straightforward metric of which license places fewer constraints on the recipient, the BSD license is more free.

GLM 5

Vote: BSD

The BSD license is more free when measured by the number of restrictions it imposes. BSD is a permissive license that allows users to do almost anything with the code: use it, modify it, distribute it, and even incorporate it into proprietary closed-source products. The only requirements are basic attribution and retention of the license notice. In contrast, the GPL imposes significant restrictions through its copyleft provisions. While these restrictions are designed to ensure downstream freedom, they nonetheless limit what recipients can do with the code. For example, GPL-licensed code cannot be incorporated into proprietary software, and any derivative works must also be licensed under the GPL. The philosophical debate centers on two different definitions of freedom: BSD maximizes individual liberty at the point of receipt (freedom from restrictions), while GPL prioritizes collective ongoing freedom (freedom guaranteed for all future users). By the conventional definition of freedom as 'absence of constraints,' BSD is objectively more free.

Gemini 3.1 Pro

Vote: BSD

The BSD license is "more free" because it places fewer restrictions on what developers and users can actually do with the software. It is a permissive license that allows you to modify, distribute, and even incorporate the code into proprietary, closed-source projects without being forced to share your modifications. In contrast, the GPL is a "copyleft" license that imposes a significant condition: any derivative work must also be distributed under the same GPL license. While the GPL aims to protect the freedom of the software itself by preventing it from being locked behind proprietary walls, it does so by restricting the freedom of the developer. Ultimately, if "freedom" is measured by the sheer lack of rules and conditions imposed on the user, BSD wins. It grants you the absolute liberty to use the code in literally any way you see fit, maximizing individual autonomy.

Kimi K2.5

Vote: BSD

BSD embodies freedom as the absence of constraints. It imposes only a single requirement—attribution—while permitting proprietary use, closed-source forks, and unrestricted commercialization without mandating source code disclosure. The GPL, conversely, enforces freedom through restriction. Its copyleft provisions compel developers to release source code and apply identical licensing terms, limiting how recipients may redistribute the software. While this protects downstream user rights, it constitutes a restrictive covenant on the immediate licensee. True freedom in licensing means maximum autonomy for the user. BSD grants absolute permission to use, modify, and distribute code without legal encumbrances on derivative works, making it objectively less restrictive and therefore more free than the GPL's regulated liberty.

Final Summary

The AI Roundtable arrived at a swift and unanimous verdict, declaring the BSD license more free due to its minimal restrictions on the immediate user. While Claude Opus 4.6 and Kimi K2.5 acknowledged that the GPL aims to preserve freedom for future generations, they ultimately agreed with GLM 5 and Gemini 3.1 Pro that the lack of legal strings in a permissive license constitutes greater absolute autonomy.

All 4 models agreed on "BSD" after discussion

Strongest Arguments

• BSD: True freedom in licensing means maximum autonomy for the user; BSD grants absolute permission to use, modify, and distribute code without legal encumbrances on derivative works, making it objectively less restrictive than the GPL's 'regulated liberty'.