Arcee AI Trinity Large Thinking is a powerful open-source reasoning model available free on OpenRouter.
https://openrouter.ai/api/v1 arcee-ai/trinity-large-thinking Arcee AI: Trinity Large Thinking is listed for chat, reasoning workloads and supports a 262K context window.
Use the comparison and availability sections before choosing this listing, because it is not currently marked as free.
We only found this Arcee AI: Trinity Large Thinking listing on OpenRouter in the current catalog. Use the related models section for nearby alternatives.
| Provider | Model listing | Access | Context | API | Limits |
|---|---|---|---|---|---|
| | Arcee AI: Trinity Large Thinking | Paid | 262K | OpenAI-style | 200 req/day (free tier) |
| Model | Provider | Context | Access |
|---|---|---|---|
| Poolside: Laguna S 2.1 (free) | OpenRouter | 262K | Free tier |
| Poolside: Laguna XS 2.1 (free) | OpenRouter | 262K | Free tier |
| Cohere: North Mini Code (free) | OpenRouter | 256K | Free tier |
| NVIDIA: Nemotron 3.5 Content Safety (free) | OpenRouter | 128K | Free tier |
| NVIDIA: Nemotron 3 Ultra (free) | OpenRouter | 1.0M | Free tier |
Arcee AI: Trinity Large Thinking is tagged for chat in this catalog and works with OpenAI-compatible client libraries.
Arcee AI: Trinity Large Thinking is tagged for reasoning in this catalog and works with OpenAI-compatible client libraries.
Arcee AI: Trinity Large Thinking is not currently marked as free on OpenRouter.
The model ID shown in this catalog is arcee-ai/trinity-large-thinking.
The listed free tier limit is 200 req/day (free tier). Limits can change per account tier, so confirm against the provider dashboard.
The listed context window is 262K tokens with up to 262K output tokens.
Arcee AI Trinity Large Thinking is a powerful open-source reasoning model available free on OpenRouter. With a 262K context window, it is optimized for agentic workflows and performs well on PinchBench and reasoning benchmarks. Best results come from preserving interleaved thinking (chain-of-thought) tokens. Model weights are open on Hugging Face. Text-only. OpenAI-compatible via OpenRouter. Free tier: 200 RPD (or 1,000 with $10 lifetime credit).
For API keys, setup steps, and provider-level limits, see the OpenRouter provider page.