Does ChatGPT Have Open Source?
By ToolVS Research Team ยท Last checked April 1, 2026
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NO
No, ChatGPT and GPT-4 are proprietary. OpenAI has not open-sourced their latest models.
What We Found
We checked this in April 2026 and here's what we found โ Despite the name, OpenAI's flagship models (GPT-4, GPT-4o, o1) are proprietary. The model weights, training data, and architecture details are not publicly available. OpenAI does publish some research but keeps commercial models closed source.
Limitations
- โ ๏ธ Proprietary models
- โ ๏ธ No model weights available
- โ ๏ธ Cannot inspect or modify
- โ ๏ธ "Open" in name refers to original mission, not license
Need Open Source? These Tools Have It
Try ChatGPT Yourself
See if open source meets your needs. Most tools offer a free trial or free plan to get started.
Try ChatGPTFree โMore About ChatGPT
Does ChatGPT have free plan?โ
YESDoes ChatGPT have api access?โ
YESDoes ChatGPT have mobile app?โ
YESDoes ChatGPT have dark mode?โ
YESDoes ChatGPT have plugins / gpts?โ
YESDoes ChatGPT have file upload?โ
YES
Frequently Asked Questions
Does ChatGPT have open source on mobile?
Since ChatGPT doesn't fully support open source on desktop, mobile support is not available either. Consider alternatives listed above if this feature is important to you.
Is open source available on ChatGPT's free plan?
ChatGPT doesn't offer open source on any plan currently. This applies to both free and paid tiers.
What are the best alternatives to ChatGPT for open source?
For open source, consider Llama. These tools offer this feature and may better suit your needs. Check our comparison pages for detailed side-by-side analysis.
About this check: We verify feature availability by reviewing official documentation, testing the product directly, and monitoring changelog updates. Information was last verified on April 1, 2026. Features and pricing may have changed since our last check.Our methodology โ