# Qwen3 Coder Flash (30B-A3B)

> Coding-tuned Qwen model that keeps a straightforward grouped-query MoE stack instead of the newer hybrid-attention variants.

| Property | Value |
| --- | --- |
| Lab | Alibaba Cloud (China) |
| Released | 2025-07-31 |
| Decoder type | Sparse MoE |
| Family | Sparse MoE |
| Scale | 30B total, 3.3B active (11% active) |
| Context window | 256,000 tokens |
| Attention | GQA |
| Layer mix | 48 GQA |
| KV cache / token (bf16) | 96 KiB (Moderate) |
| License | Apache License 2.0 |

**Key detail:** Uses 128 experts with 8 active per token and a native 256k context window for coding workloads.

## Architecture concepts

- [Grouped-Query Attention (GQA)](https://llm-atlas-7or.pages.dev/concepts/gqa.md): Several query heads share one key/value head, shrinking the KV cache with little quality loss.
- [Mixture of Experts (MoE)](https://llm-atlas-7or.pages.dev/concepts/moe.md): Many feed-forward experts, but a router sends each token to only a few of them.

## Benchmark (Artificial Analysis Intelligence Index)

- AA Intelligence Index v4.3.2: total 9.6 (Scientific 1.9)

## Links

- Architecture diagram: https://sebastianraschka.com/llm-architecture-gallery/images/architectures/qwen3-coder-flash-30b-a3b-mixture-of-experts.webp
- View in article: https://magazine.sebastianraschka.com/p/a-dream-of-spring-for-open-weight#%C2%A74-qwen3-coder-next-an-attention-hybrid-for-coding
- From scratch: https://github.com/rasbt/LLMs-from-scratch/tree/main/ch05/11_qwen3
- config.json: https://huggingface.co/Qwen/Qwen3-Coder-30B-A3B-Instruct/blob/main/config.json
- License: https://huggingface.co/Qwen/Qwen3-Coder-30B-A3B-Instruct/blob/main/LICENSE
- Source card (source of truth): https://sebastianraschka.com/llm-architecture-gallery/#card-qwen3-coder-flash-30b-a3b
- Web page: https://llm-atlas-7or.pages.dev/models/qwen3-coder-flash-30b-a3b/
- JSON: https://llm-atlas-7or.pages.dev/api/models/qwen3-coder-flash-30b-a3b.json

_Data from Sebastian Raschka's LLM Architecture Gallery (https://sebastianraschka.com/llm-architecture-gallery/). Synced 2026-11-04._