Open source alternatives to Gemini 3.1 Pro

DeepSeek V4 Pro is listed first. Choose DeepSeek V4 Pro when you need a frontier-size open model for coding and research that can run in your own cloud.

Yes. The code of all 3 is public under MIT, so you can use them with no licence fee. Running one yourself costs the server and your time to look after it, and some makers also sell a hosted plan.

Start from the job you use Gemini 3.1 Pro for. Choose DeepSeek-V3.2 when you need open weights for agent work that you can self-host and fine-tune, rather than a Google-hosted model. Choose Ring-2.6-1T when you want a trillion-parameter MIT-licensed reasoning model for agent workflows on your own cluster.

All 3: DeepSeek V4 Pro, DeepSeek-V3.2 and Ring-2.6-1T. Each tool's page says what it needs to run.

MIT (3). MIT, BSD and Apache let you change and reuse the code freely.

The hosting. Gemini 3.1 Pro's maker runs the servers for you; with an open source tool the updates, backups, security fixes and support are yours, unless you take the maker's hosted plan. Features differ too, so check what each one imports and exports before you move your data.