ai21/jamba-largeOpen WeightsAI21's hybrid SSM-Transformer long-context model for enterprise agents and grounded generation
Benchmark Pricing$2.00 / 1M in$8.00 / 1M out
Context: 256,000 tokens•Max Output: 4,096 tokens•Knowledge: 2024-08-22•Released: 2025-07-03
TECHNICAL SPECIFICATIONS
Context Window256,000256K tokens
Max Output4,0964.1K tokens
LicenseOpen SourceSelf-hostable
Input Modalities
Text
Function / Tool CallingSupported (MCP Ready)
Structured OutputsGuaranteed Schema
MODEL CONTEXT PROTOCOL (MCP) READINESS
✓ Jamba Large 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 256,000 tokens, this model can handle moderately large MCP tool definitions and multi-turn conversation logs comfortably.
API CALL INVOCATION EXAMPLE
// Example: Calling Jamba Large via OpenAI SDK
import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.AI21_API_KEY,
});
const response = await client.chat.completions.create({
model: "ai21/jamba-large",
messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});
console.log(response.choices[0].message.content);PRICING BY PROVIDER
AI21 Labsjamba-large
$2.00 / $8.00
Rates in USD per 1M tokens. Rates synchronized from models.dev public catalog.
MODEL RESOURCES
More Models by AI21 Labs
Alternative and family models from the same lab