Arcee AI

Arcee AI has released Trinity Large Thinking, an open source reasoning model with a 262,144-token context window. The model is available free via OpenRouter and claims strong performance in PinchBench, agentic workloads, and reasoning tasks.

Arcee AI has released Trinity Large Preview, a 400B-parameter sparse Mixture-of-Experts model with 13B active parameters per token using 4-of-256 expert routing. The model supports context windows up to 512K tokens and is available with open weights under permissive licensing.