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Arcee AI: Trinity Large Thinking

arcee-ai/trinity-large-thinking:free

Model weights

Trinity Large Thinking is a powerful open source reasoning model from the team at Arcee AI. It shows strong performance in PinchBench, agentic workloads, and reasoning tasks. Launch video: https://youtu.be/Gc82AXLa0Rg?si=4RLn6WBz33qT--B7(opens in new tab)

This model is optimized for agentic workflows and performs best when reasoning is preserved (aka interleaved thinking). Learn how to preserve reasoning in our docs: https://openrouter.ai/docs/guides/best-practices/reasoning-tokens#preserving-reasoning(opens in new tab)

Modalities

Price

Free

Context

262K

Released

Apr 1, 2026

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Frequently asked questions

Trinity Large Thinking is a powerful open source reasoning model from the team at Arcee AI. It shows strong performance in PinchBench, agentic workloads, and reasoning tasks. Launch video: https://youtu.be/Gc82AXLa0Rg?si=4RLn6WBz33qT--B7(opens in new tab) This model is optimized for agentic workflows and performs best when reasoning is preserved (aka interleaved thinking).

Yes. The pricing shown on this page for Trinity Large Thinking is zero, so you are not charged for prompt or completion tokens. Free endpoints are rate limited — see the rate limit docs.

Trinity Large Thinking has a 262,144 token context window.

Trinity Large Thinking was released on April 1, 2026.