# Trinity Large Preview: AI model fact sheet

- **Provider:** arcee-ai
- **Released:** 2025-01-27
- **Context window:** 131,000 tokens
- **API pricing:** $0.000 / 1M input, $0.000 / 1M output
- **OpenRouter ID:** arcee-ai/trinity-large-preview:free
- **Capabilities:** conversation, reasoning, code-generation, agentic-tool-use

Trinity-Large-Preview is a frontier-scale open-weight language model from Arcee, built as a 400B-parameter sparse Mixture-of-Experts with 13B active parameters per token using 4-of-256 expert routing. It excels in creative writing, storytelling, role-play, chat scenarios, and real-time voice assistance. Trained to navigate well in agent harnesses like OpenCode, Cline, and Kilo Code, and to handle complex toolchains and long, constraint-filled prompts.

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/trinity-large-preview-free