Xiaomi's 309B MoE with a 256K contextAlternative to
Claude Sonnet 4.6
Kimi K2.5Open source alternatives to GPT-5.2
2 open source tools do the job of GPT-5.2. The most starred is MiMo-V2-Flash, with 1.4k stars. Verified on GitHub. About GPT-5.2
GPT-5.2Paid
MiMo-V2-Flash1.4k stars · MITGitHubAll 2 alternatives
Questions about alternatives to GPT-5.2
What is the best open source alternative to GPT-5.2?
By GitHub stars it is MiMo-V2-Flash, with 1,400 stars and a commit on 29 Oct. Choose MiMo-V2-Flash when you need an open model for coding and reasoning that you can host and fine-tune yourself.
Is there a free alternative to GPT-5.2?
Yes. The code of all 2 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.
How do I choose between them?
Start from the job you use GPT-5.2 for. Choose DeepSeek-V3.2 when you want an MIT-licensed reasoning model for agents that keeps thinking during tool calls on your own servers.
Which GPT-5.2 alternatives can I host on my own server?
All 2: MiMo-V2-Flash and DeepSeek-V3.2. Each tool's page says what it needs to run.
Which ones are still being worked on?
All 1 we track had a commit in the last 30 days, among them MiMo-V2-Flash. A recent commit shows the project is kept up, not that it will stay that way.
What licences do they use?
MIT (2). MIT, BSD and Apache let you change and reuse the code freely.
What do I lose by leaving GPT-5.2?
The hosting. GPT-5.2'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.