Qwen3 Coder Next Is Now Available in Puter.js

Puter.js now supports Qwen3 Coder Next, Alibaba's open-weight coding model designed specifically for coding agents and local development.

What is Qwen3 Coder Next?

Qwen3 Coder Next is an open-weight language model from Alibaba's Qwen team, built specifically for agentic coding tasks. With 80B total parameters but only 3B active per token, it delivers performance comparable to models 10-20x larger while remaining efficient enough for local deployment. Key features include:

• Ultra-Sparse MoE Architecture: 512 experts with only 10 activated per token, achieving massive parameter efficiency
• Hybrid Attention: Combines Gated DeltaNet and Gated Attention to handle 256K context windows efficiently
• Agentic Training: Trained on 800,000 verifiable coding tasks from real GitHub pull requests with full execution environments
• Tool Calling: Excels at long-horizon reasoning, complex tool usage, and recovering from execution failures

On SWE-Bench Verified, Qwen3 Coder Next scores 70.6%, matching DeepSeek-V3.2 (671B parameters) while using a fraction of the compute.

Examples

Code generation

puter.ai.chat("Write a Python function that implements a binary search tree with insert, delete, and search methods",
  { model: 'qwen/qwen3-coder-next' }
);

Bug fixing

puter.ai.chat(`Fix this code that should reverse a linked list but doesn't work:
def reverse(head):
    prev = None
    while head:
        head.next = prev
        prev = head
        head = head.next
    return prev`,
  { model: 'qwen/qwen3-coder-next' }
);

Code review

puter.ai.chat(`Review this code for potential issues:
async function fetchUsers() {
  const response = await fetch('/api/users');
  const data = response.json();
  return data.users;
}`,
  { model: 'qwen/qwen3-coder-next' }
);

Complex reasoning

puter.ai.chat("Explain the trade-offs between using Redis vs Memcached for session storage in a distributed system",
  { model: 'qwen/qwen3-coder-next' }
);

Get Started Now

Just add one script tag to your HTML:

<script src="https://js.puter.com/v2/"></script>

No API keys needed. Start building with Qwen3 Coder Next immediately.

Learn more:

• Free, Unlimited Qwen API
• Puter.js AI Documentation