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Large Language ModelsAI Coding AssistantsOpen-Source AIAI Business & IndustryVentureBeat AIPublished: Apr 3, 2026, 10:00 JST

Arcee releases Trinity-Large-Thinking, a 399-billion parameter open-source AI model under Apache 2.0 license, positioning U.S. companies to compete as Chinese firms shift toward proprietary models.

Arcee, a San Francisco-based AI lab, released Trinity-Large-Thinking this week as a text-only reasoning model with 399 billion parameters under the open Apache 2.0 license

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