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Trinity Large Thinking

Arcee AI's open-weights reasoning MoE (OpenMDW-1.1) with ~398B total and ~13B active parameters.

Arcee AI
Open weights
Released 1 Apr 2026

Where it ranks

B
Chat & assistants
Models · Local · 1,367 on LMArena Text Arena (overall, style control)
C
Coding
Models · Local · 1,238 on LMArena WebDev / Code Arena (overall)
C
Vector graphics & logos
Models · Local · 1,015 on Design Arena SVG

Facts

Vendor: Arcee AI
Family: Trinity
Released: 1 Apr 2026
Weights: Open: download and run it yourself
License: OpenMDW-1.1
Parameters: 399B (13B active)
GPU memory to run locally: ~229 GB (4-bit ≈ 399 B × 0.57 GB + 1.5 GB ≈ 229 GB, estimate.)
API price: $0.25 in / $0.8 out per 1M tokens (OpenRouter listed price)
Access: Free (open weights)
Last verified: 19 Oct 2026

Price from openrouter.ai, 19 Oct 2026.

Benchmark results

Benchmark	Result	Entry on the leaderboard	As of	Source
Artificial Analysis Intelligence Index	11	`Trinity Large Thinking` Raw value from the page's embedded model data; the site displays it rounded to an integer.	19 Oct 2026	artificialanalysis.ai
Design Arena SVG	1,015	`Trinity Large Thinking` Design Arena SVG, rank 113, 2774 battles; marked inactive; rows read from POST https://www.designarena.ai/api/leaderboard (arenaType 'models', category 'svg'); names from https://www.designarena.ai/api/registry	19 Oct 2026	designarena.ai
LMArena Text Arena (overall, style control)	1,367	`trinity-large-thinking` From LMArena's official leaderboard-dataset (text_style_control, split latest, category overall, published 2026-10-15), which mirrors https://arena.ai/leaderboard/text. Rank 199; 30337 votes; 95% CI 1362.7-1371.9.	15 Oct 2026	huggingface.co
LMArena WebDev / Code Arena (overall)	1,238	`Trinity Large Thinking` From LMArena's official leaderboard-dataset (webdev = Code Arena, split latest, category overall, published 2026-10-18), which mirrors https://arena.ai/leaderboard/webdev. Rank 136; 1361 votes; 95% CI 1217.9-1257.9.	18 Oct 2026	huggingface.co

Where you can use it

No tracked tool lists this model yet; as open weights it runs in local runtimes.

Earlier versions

Trinity Large Preview · —

Sources