RIP closed models ?
Brex promotes its intelligent finance platform and announces upcoming events in NYC, including a founders-only dinner and a panel discussion, focused on the shift from closed to open-weight models in AI. The company highlights the challenges faced by closed models and the growing momentum of open-weight models. Brex also offers a sign-up incentive of $1,250 towards Brex Travel or $750 cash.
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September 22, 2026 | Read online
RIP closed models ?
Happy Tuesday, Brex Community!
The momentum of open-weight models (e.g., Moonshot, Deepseek, Z.Ai, etc.) is high right now. The data supports this, as do the conversations I’m having with founders. Take a look at the images below. Closed-weight models (e.g., Anthropic, OpenAI, xAI, Gemini) are still the leaders when it comes to spending, but they are facing serious challenges, and the question is whether they can hold off the competition.
The days of tokenmaxxing on closed models are over; it was a great way to get developers and employees engaged with AI from 2025 through 2026, but finance teams have had enough. As finance leaders head into 2027 planning, token costs are under scrutiny. The bullish case for closed models is that there are still many companies and industries that haven’t adopted AI yet, so the total addressable market is growing, and closed-weight models are easier to adopt if you are not technical.
There are two events Brex is co-hosting next week in NYC related to this topic: a founders-only dinner on September 30th and a panel & mixer on September 29th. It will be a great conversation if you are in the room.
Have a great week.
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