Are they tho? If I was an investor I would be interested in knowing, if DeepSeek managed to create an ostensibly better, more efficient product using less resources in the way they did, then why didn't OpenAI do the same, them being so cutting edge and innovative and all?
But that may be giving investors too much credit.
Imagine that a new web search engine ("Blob") worked by putting searches through Google, DuckDuckGo, etc. and then applying an algorithm to refine their collective outputs to provide to the end user. It might be a better result for the user, but actually most of the work is being done by the other search engines. Without access to the other search engines, "Blob" would be pretty much useless. The implication therefore is that DeepSeek is only any use because it's used OpenAI to do lots of the work, and thus without OpenAI, it's a bust.
OpenAI however can't do the same itself, because this model works by piggy-backing off someone else's hard work... as OpenAI is the one doing the hard work, it's got no-one to piggy-back.
Presumably, OpenAI could make a parallel "light" AI and train it off their main AI to achieve the same as DeepSeek - with lower resource cost. However, presumably that would also retard the development of their main AI, because then it's no longer being used to collect inputs and generate outputs to drive development.
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One might argue it's not so bad if AI ends up as there being sort of core, "heavy" AIs doing the main development, and then a load of "light" AI interfaces that use these as a springboard to create faster, better, less resource-intensive consumer output. But you'd certainly expect those "light" AIs to make agreements and pay the "heavy" AIs for providing so much of the background work. Just like many think any AI developers should pay human creators for the content used in their programming.