Seed-OSS-36B-Instruct

ByteDance SeedMCP Tool CallReasoning

bytedance-seed/seed-oss-36b-instructOpen Weights

Open ByteDance Seed model for long-context reasoning, tool use, and agents

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

Context: 524,288 tokens•Max Output: 524,288 tokens•Knowledge: 2024-07•Released: 2025-08-20

TECHNICAL SPECIFICATIONS

Context Window524,288524.3K tokens

Max Output524,288524.3K tokens

LicenseApache 2.0Self-hostable

Input Modalities

Text

Function / Tool CallingSupported (MCP Ready)

Structured OutputsGuaranteed Schema

MODEL CONTEXT PROTOCOL (MCP) READINESS

✓ Seed-OSS-36B-Instruct 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 Seed-OSS-36B-Instruct via OpenAI SDK
import OpenAI from "openai";

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

const response = await client.chat.completions.create({
  model: "bytedance-seed/seed-oss-36b-instruct",
  messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});

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