Introducing the Arcee Open Models API Beta

Arcee AI has launched a beta expansion of its Open Models API, extending beyond its Trinity family to offer several frontier open models for demanding, long-horizon agent workloads. The initial catalog includes Trinity-Large-Thinking, DeepSeek-V4-Pro and V4-Flash-Latest, GLM-5.2, Kimi-K3, and Thinking Machines’ Inkling-Small, with token-based pricing ranging from $0.14 per million input tokens for DeepSeek-V4-Flash-Latest to $15 per million output tokens for Kimi-K3. Arcee says the broader selection gives developers and enterprises more flexibility while generating usage insights that can inform future Trinity model development, reflecting its view that different workloads require different models. The release coincides with the open-sourcing of nac, Arcee’s internal harness for long-running agent tasks, which is expected to help improve API routing, serving, and model support over time. New users who register and add a credit card receive $5 in API credits to test the catalog and nac.

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