An open-weights model against a closed one. The biggest difference is not quality, it is who controls the weights.
DeepSeek and GPT are often compared on capability, but the defining difference is structural. DeepSeek is open weights: the model is published, so anyone can audit it, fine-tune it, or host it independently. GPT, the family behind ChatGPT, is closed: OpenAI runs it and does not release the weights.
On day-to-day chat both are highly capable. DeepSeek built its name on reasoning, math, and code; GPT is a broad, polished generalist with a large product and tooling ecosystem.
Berges AI runs DeepSeek today. GPT appears here as a reference point. We include it because it is the model most people compare against, not because we host it.
This is the heart of it. DeepSeek's weights are public, so you can inspect them, run them on your own hardware, and never depend on a single vendor. GPT's weights are private, so you use it through OpenAI on OpenAI's terms.
With an open-weights model you are not locked in: if a host changes terms or prices, you can move. With a closed model you get a polished product, but the provider controls availability, pricing, and what the model is allowed to do.
Both are strong. The gap that used to exist between open and closed models has narrowed considerably. For most everyday work, the open-vs-closed question now matters more than a raw capability gap.
If transparency, control, and portability matter to you, an open-weights model like DeepSeek is the point. If you want a single polished product and do not need the weights, GPT is a reasonable closed alternative. They are not hosted in the same place.
Berges AI runs DeepSeek and other open-weights models, with privacy as a default and encryption at rest. GPT is shown for comparison only; we do not host it.
For most everyday tasks they are close, and DeepSeek is particularly strong on reasoning and code. The bigger difference is that DeepSeek is open weights and GPT is closed.
DeepSeek publishes its model weights, so anyone can audit, fine-tune, or self-host it. GPT keeps its weights private, so you can only use it through OpenAI.
No. Berges AI runs open-weights models such as DeepSeek. GPT appears on this page only as the reference point most people compare against.