Trinity Large Thinking

Arcee-aiMCP Tool CallReasoning
arcee-ai/trinity-large-thinkingOpen Weights

Reasoning-optimized 398B MoE agent model with extended thinking for long-horizon and multi-turn tool use

Benchmark Pricing$0.25 / 1M in$0.90 / 1M out$0.13 cache read
Context: 524,288 tokens•Max Output: 262,144 tokens•Released: 2026-04-01

TECHNICAL SPECIFICATIONS

Context Window524,288524.3K tokens
Max Output262,144262.1K tokens
LicenseOpenMDW-1.1Self-hostable
Input Modalities
Text
Function / Tool CallingSupported (MCP Ready)
Structured OutputsGuaranteed Schema

MODEL CONTEXT PROTOCOL (MCP) READINESS

✓ Trinity Large Thinking natively supports OpenAI / Anthropic format tool calling and is fully compatible with MCP servers and agent loops.

MCP Context Window Recommendations

With a context capacity of 524,288 tokens, this model can handle extremely large MCP resource manifests, complete database schemas, and multiple active server tool definitions simultaneously without degradation.

API CALL INVOCATION EXAMPLE

// Example: Calling Trinity Large Thinking via OpenAI SDK
import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.ARCEE-AI_API_KEY,
});

const response = await client.chat.completions.create({
  model: "arcee-ai/trinity-large-thinking",
  messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});

console.log(response.choices[0].message.content);

PRICING BY PROVIDER

6 providers
NanoGPTarcee-ai/trinity-large-thinking
$0.25 / $0.90$0.13 cache
Vercel AI Gatewayarcee-ai/trinity-large-thinking
$0.25 / $0.80$0.06 cache
Kilo Gatewayarcee-ai/trinity-large-thinking
$0.25 / $0.80$0.06 cache
DigitalOceanarcee-trinity-large-thinking
$0.25 / $0.90$0.06 cache
Arceetrinity-large-thinking
$0.25 / $0.80$0.06 cache
OpenRouterarcee-ai/trinity-large-thinking
$0.25 / $0.80$0.06 cache

Rates in USD per 1M tokens. Rates synchronized from models.dev public catalog.

Prompt Caching Active

This model supports prompt caching at $0.13 / 1M tokens, saving up to 50% on repetitive MCP tool definitions and system instructions.