alt Hacker NewsAWS has built 20 data centers in Indiana full of half a million Trainium chips explicitly for Anthropic. Anthropic is using them heavily. The same press announcement that Anthropic has made about Google TPUs is the exact same one they made a year ago about Trainium. Hell, even in the Google TPU press release they explicitly mention how they are still using Trainium as well.
Can you link to the press releases? The only one I'm aware of by Anthropic says they will use Tranium for future LLMs, not that they are using them.