Arcee AI · Released Apr 1, 2026Trinity Large Thinking
Reasoning-optimized 398B MoE agent model with extended thinking for long-horizon and multi-turn tool use.
- Capability
- —No ECI score yet
- Input
- $0.25per 1M tokens
- Output
- $0.80per 1M tokens
- Context
- 524K262K max output
What it costs
- Input
- $0.25per million tokens
- Output
- $0.80per million tokens
- Cached input
- $0.06per million tokens
- Blended (3:1)
- $0.388cheaper than 67% of priced models
Typical monthly bills
| Monthly usage | Estimated cost |
|---|---|
| Side project2M input + 0.5M output tokens | $0.90 |
| Team assistant25M input + 5M output tokens | $10.25 |
| Production app250M input + 50M output tokens | $102.50 |
Official Arcee API price, as listed on models.dev.
Independent benchmarks
Epoch AI has not published a Capabilities Index score for Trinity Large Thinking yet.
The details
- Lab
- Arcee AI
- Released
- Apr 1, 2026
- Context window
- 524,288 tokens
- Max output
- 262,144 tokens
- Inputs
- Text
- Output
- Text
- Reasoning
- Always on
- Tool calling
- Yes
- Structured output
- No
- Weights
- Open weights · OpenMDW-1.1
- API model ID
trinity-large-thinkingon Arcee- Availability
- 6 API providerslisted on models.dev
- Status
- Beta
More from Arcee AI
About Trinity Large Thinking
How much does Trinity Large Thinking cost?
Trinity Large Thinking costs $0.25 input / $0.80 output per million tokens (official Arcee API price). Cached input is $0.06 per million tokens. At a 3:1 input-to-output mix that is $0.388 per million tokens, cheaper than 67% of the 360 priced models we track.
What is the context window of Trinity Large Thinking?
Trinity Large Thinking accepts up to 524,288 tokens per request and can write up to 262,144 tokens in one response.
How good is Trinity Large Thinking?
Epoch AI has not published a Capabilities Index score for Trinity Large Thinking yet.
Is Trinity Large Thinking open source?
Yes. Arcee AI publishes the weights under the OpenMDW-1.1 licence, so it can be downloaded and self-hosted.
What inputs does Trinity Large Thinking support?
Trinity Large Thinking accepts text and replies in text. It is a reasoning model, supports tool calling.
When was Trinity Large Thinking released?
Arcee AI released Trinity Large Thinking on Apr 1, 2026.
What are the best alternatives to Trinity Large Thinking?
The closest current models from other labs on capability, price and release date are Mercury Edit 2 (Inception, $0.25 / $0.75), Nemotron 3 Nano Omni 30B A3B Reasoning (NVIDIA, $0.25 / $0.85), Step 3.7 Flash (StepFun, $0.185 / $1.11) and Seed 1.8 (ByteDance Seed, $0.119 / $1.19).