References 684% CONFIDENCEOverall confidence: 84%How well the pin's source and references back up its dates.Weighted average of how firmly 6 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better

The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.

• [1]90%
  arcee.ai/blog/trinity-large-thinking

  arcee.ai· Posted Oct 12, 2026· Starts Apr 1, 2026 ✓· 29% of score

  Arcee's^[2] post "Trinity-Large-Thinking: Scaling an Open Source Frontier Agent" is dated Apr 1, 2026 and says "Today we are releasing Trinity-Large-Thinking on our API and the weights on Hugging Face^[4]"; OpenRouter^[5] lists it as released Apr 1, 2026.

• [2]85%
  Trinity is moving to OpenMDW-1.1 - Arcee AI

  arcee.ai· Published May 29, 2026· 17% of score

  Arcee's^[1] later post moving the whole Trinity family, including Trinity-Large-Thinking, from Apache 2.0 to the Linux Foundation's OpenMDW-1.1 licence.

• [3]70%
  Arcee AI Releases Trinity-Large-Thinking: A 400B Open Reasoning Agent - NYU Shanghai RITS

  rits.shanghai.nyu.edu· Published Apr 2, 2026· 14% of score

  Secondary write-up dated April 2, 2026 confirming the April 1 release, the 398B/13B sparsity, 33-day 2,048-B300 run and think-block handling.^[1]

• [4]90%
  arcee-ai/Trinity-Large-Thinking - Hugging Face

  huggingface.co· Published Apr 1, 2026· 14% of score

  Model card: about 398B parameters with about 13B active, 256 experts with 4 active, 17T pretraining tokens on 2,048 B300 GPUs, context extended to 512k, think-block reasoning that must be kept in context, and scores including PinchBench 91.9, AIME25 96.3 and SWE-bench Verified 63.2.^[1]

• [5]80%
  Arcee AI: Trinity Large Thinking - OpenRouter

  openrouter.ai· Published Apr 1, 2026· 14% of score

  Router listing: released Apr 1, 2026, 262K context and $0.25 per 1 million input tokens and $0.80 per 1 million output tokens.^[1]

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