In the case where you pay for tokens without a subscription, the analysis is still very much not in favor of buying hardware.

The assumption previously used was that you can run a Sol level model on an M6 or whatever hardware $20k gives you. That is not true, it was an assumption made to show that even giving your own hardware every reasonable advantage it still loses.

Lets compare buying tokens of the best model you might run on your own hardware (still being unrealistic in favor of your own hardware) vs that same class of model on the market. I think one of the best models you might be able to run is GLM 5.4, but lets just look at chinese models generally:

$20k workstation, best case: $15k M5 Ultra 512GB, 36-month amortization, ~$440/mo. Runs a GLM-5.3-class model at ~30 tok/s. Saturated 24/7 it produces roughly 58M output tokens/month.

Buying those tokens:

  DeepSeek V4 Pro  @ $0.87/M   $50
  Kimi K2.6        @ $4.00/M   $232
  GLM-5.3          @ $4.40/M   $255
  Kimi K3          @ $15.00/M  $870  (does not fit on the box)

The economics can never work in your favor for buying your own hardware here, unless you can utilize it or sell excess capacity and you have access to nearly free electricity. The reason is someone else can buy the same hardware at scale (or realistically more efficient hardware), park it somewhere with very cheap electricity, and sell tokens. They can get very high utilization that you are not likely to get.

And keep in mind I am giving 'your own hardware' no overhead or maintenance cost, despite your condition that it's in a large corporate environment. In reality corporate IT would make it almost impossible to set up and your would need huge lead times to buy the hardware and get it installed.