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Qwen3.5-4B vs Qwen3.8-Flash-Next

Qwen3.8-Flash-Next significantly outperforms across most benchmarks.

Alibaba Cloud / Qwen Team · Alibaba Cloud / Qwen Team · Updated for 2026

Which is better?

Qwen3.5-4B outperforms in 0 benchmarks, while Qwen3.8-Flash-Next is better at 3 benchmarks (GPQA, IFBench, LiveCodeBench v6). Qwen3.8-Flash-Next significantly outperforms across most benchmarks.

Based on current benchmark, pricing, and model metadata for 2026.

Choose Qwen3.5-4B

  • you are already invested in the Alibaba Cloud / Qwen Team ecosystem

Choose Qwen3.8-Flash-Next

  • you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
  • you want the most recent training data — it shipped Aug 2026

At a glance

The differences that matter most.

Qwen3.5-4B
Alibaba Cloud / Qwen Team
Qwen3.8-Flash-Next
Alibaba Cloud / Qwen Team
Benchmark wins
0 of 3
3 of 3
Input price
— / M
— / M
Output price
— / M
— / M
Context window
—
—
Released
Mar 2026
Aug 2026
License
Apache 2.0
Qwen Community License 1.0

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Qwen3.5-4B outperforms in 0 benchmarks, while Qwen3.8-Flash-Next is better at 3 benchmarks (GPQA, IFBench, LiveCodeBench v6).

Qwen3.8-Flash-Next significantly outperforms across most benchmarks.

Wed Aug 26 2026 • llm-stats.com

Arena Performance

Playground indexes and blind preference scores

Model Size

Parameter count comparison

176.0B diff

Qwen3.8-Flash-Next has 176.0B more parameters than Qwen3.5-4B, making it 4400.0% larger.

Alibaba Cloud / Qwen Team
Qwen3.5-4B
4.0Bparameters
Alibaba Cloud / Qwen Team
Qwen3.8-Flash-Next
180.0Bparameters
4.0B
Qwen3.5-4B
180.0B
Qwen3.8-Flash-Next

Input Capabilities

Supported data types and modalities

Both Qwen3.5-4B and Qwen3.8-Flash-Next support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Qwen3.5-4B

Text
Images
Audio
Video

Qwen3.8-Flash-Next

Text
Images
Audio
Video

License

Usage and distribution terms

Qwen3.5-4B is licensed under Apache 2.0, while Qwen3.8-Flash-Next uses Qwen Community License 1.0.

License differences may affect how you can use these models in commercial or open-source projects.

Qwen3.5-4B

Apache 2.0

Open weights

Qwen3.8-Flash-Next

Qwen Community License 1.0

Open weights

Release Timeline

When each model was launched

Qwen3.5-4B was released on 2026-03-02, while Qwen3.8-Flash-Next was released on 2026-08-26.

Qwen3.8-Flash-Next is 6 months newer than Qwen3.5-4B.

Qwen3.5-4B

Mar 2, 2026

5 months ago

Qwen3.8-Flash-Next

Aug 26, 2026

0 days ago

5mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Qwen3.5-4B and Qwen3.8-Flash-Next side-by-side, then vote on the output you prefer.

Qwen3.5-4B
✓ Preferred
Qwen3.8-Flash-Next
Open in Playground

FAQ

Common questions about Qwen3.5-4B vs Qwen3.8-Flash-Next.

Which is better, Qwen3.5-4B or Qwen3.8-Flash-Next?

Qwen3.8-Flash-Next significantly outperforms across most benchmarks. Qwen3.5-4B is made by Alibaba Cloud / Qwen Team and Qwen3.8-Flash-Next is made by Alibaba Cloud / Qwen Team. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Qwen3.5-4B compare to Qwen3.8-Flash-Next in benchmarks?

Qwen3.5-4B scores IFEval: 89.8%, MMLU-Redux: 88.8%, C-Eval: 85.1%, t2-bench: 79.9%, MMLU-Pro: 79.1%. Qwen3.8-Flash-Next scores MathVision: 95.7%, LiveCodeBench v6: 91.9%, GPQA: 91.7%, CharXiv-R: 90.6%, RealWorldQA: 88.5%.

What are the main differences between Qwen3.5-4B and Qwen3.8-Flash-Next?

Key differences include licensing (Apache 2.0 vs Qwen Community License 1.0). See the full comparison above for benchmark-by-benchmark results.

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