Apertus 70B

Swiss-aiMCP Tool Call

swiss-ai/apertus-70bOpen Weights

Fully open 70B multilingual LLM supporting 1800+ languages with 65K context. Trained on 15T tokens of compliant open data. Apache 2.0, EU AI Act compliant.

Benchmark Pricing$1.39 / 1M in$2.23 / 1M out

Context: 65,536 tokens•Max Output: 8,192 tokens•Knowledge: 2025-09•Released: 2025-09-02

TECHNICAL SPECIFICATIONS

Context Window65,53665.5K tokens

Max Output8,1928.2K tokens

LicenseApache-2.0Self-hostable

Input Modalities

Text

Function / Tool CallingSupported (MCP Ready)

Structured OutputsGuaranteed Schema

MODEL CONTEXT PROTOCOL (MCP) READINESS

✓ Apertus 70B 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 65,536 tokens, this model can handle compact tool sets. Consider keeping MCP server tool manifests minimal to preserve headroom.

API CALL INVOCATION EXAMPLE

// Example: Calling Apertus 70B via OpenAI SDK
import OpenAI from "openai";

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

const response = await client.chat.completions.create({
  model: "swiss-ai/apertus-70b",
  messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});

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