Qwen3.5-397B-A17B 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?
Qwen3.5-397B-A17B outperforms in 0 benchmarks, while Qwen3.8-Flash-Next is better at 6 benchmarks (GPQA, Humanity's Last Exam, IFBench, LiveCodeBench v6, SWE-bench Multilingual, Toolathlon). Qwen3.8-Flash-Next significantly outperforms across most benchmarks.
Based on current benchmark, pricing, and model metadata for 2026.
Choose Qwen3.5-397B-A17B
- you want predictable pricing at $0.60/M input and $3.60/M output
Choose Qwen3.8-Flash-Next
- you want the strongest raw capability — it leads on 6 of 6 shared benchmarks
- you want the most recent training data — it shipped Aug 2026
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
Qwen3.5-397B-A17B outperforms in 0 benchmarks, while Qwen3.8-Flash-Next is better at 6 benchmarks (GPQA, Humanity's Last Exam, IFBench, LiveCodeBench v6, SWE-bench Multilingual, Toolathlon).
Qwen3.8-Flash-Next significantly outperforms across most benchmarks.
Arena Performance
Playground indexes and blind preference scores
Model Size
Parameter count comparison
Qwen3.5-397B-A17B has 272.0B more parameters than Qwen3.8-Flash-Next, making it 217.6% larger.
Context Window
Maximum input and output token capacity
Only Qwen3.5-397B-A17B specifies input context (262,144 tokens). Only Qwen3.5-397B-A17B specifies output context (64,000 tokens).
Input Capabilities
Supported data types and modalities
Both Qwen3.5-397B-A17B and Qwen3.8-Flash-Next support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Qwen3.5-397B-A17B
Qwen3.8-Flash-Next
License
Usage and distribution terms
Qwen3.5-397B-A17B 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.
Apache 2.0
Open weights
Qwen Community License 1.0
Open weights
Release Timeline
When each model was launched
Qwen3.5-397B-A17B was released on 2026-02-16, while Qwen3.8-Flash-Next was released on 2026-08-26.
Qwen3.8-Flash-Next is 6 months newer than Qwen3.5-397B-A17B.
Feb 16, 2026
6 months ago
Aug 26, 2026
1 days ago
6mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Outputs Comparison
Judge for yourself.
Run your own prompts against Qwen3.5-397B-A17B and Qwen3.8-Flash-Next side-by-side, then vote on the output you prefer.
FAQ
Common questions about Qwen3.5-397B-A17B vs Qwen3.8-Flash-Next.