Trinity-Large-Thinking is free on OpenRouter through May 23
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Trinity-Large-Thinking is now free to use in @OpenRouter through May 23. This model is a great choice for those working with complex agentic workflows, heavy multi-turn tool use, and long-horizon routing. The free endpoint is live: https://t.co/f8D1ydeIfe
A quick technical note: This model is optimized for agentic workflows and performs best when reasoning is preserved across calls (aka interleaved thinking).
Preserved reasoning is documented in OpenRouter api docs here: https://t.co/G6Eo9Xk0wI
Context
Arcee AI made Trinity-Large-Thinking free to use on OpenRouter through May 23, according to its announcement, which links to the live endpoint. Arcee frames it as suited to complex agentic workflows, heavy multi-turn and long-horizon routing between models. It adds a specific requirement: the model is optimized to perform best when its reasoning output is preserved and passed back in across calls within a session, what Arcee calls interleaved thinking, and it points to OpenRouter's API documentation for how to keep that reasoning intact between requests, since dropping it leaves the model working from an incomplete record of its own preceding steps.
- tool use — A model's ability to call external functions — run code, search the web, edit files — instead of only generating text.
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