MiniCPM5-1B

OpenbmbMCP Tool CallReasoning

openbmb/minicpm5-1bOpen Weights

Dense 1B-class open-source model for on-device and resource-constrained use, with native long-context support, Think / No Think chat modes, and tool calling

Benchmark Pricing$0.00 / 1M in$0.00 / 1M out

Context: 131,072 tokens•Max Output: 131,072 tokens•Released: 2026-05-19

TECHNICAL SPECIFICATIONS

Context Window131,072131.1K tokens

Max Output131,072131.1K tokens

Licenseapache-2.0Self-hostable

Input Modalities

Text

Function / Tool CallingSupported (MCP Ready)

Structured OutputsGuaranteed Schema

MODEL CONTEXT PROTOCOL (MCP) READINESS

✓ MiniCPM5-1B 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 131,072 tokens, this model can handle moderately large MCP tool definitions and multi-turn conversation logs comfortably.

API CALL INVOCATION EXAMPLE

// Example: Calling MiniCPM5-1B via OpenAI SDK
import OpenAI from "openai";

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

const response = await client.chat.completions.create({
  model: "openbmb/minicpm5-1b",
  messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});

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