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Claude Sonnet 5 vs Qwen3.8-Flash-Next

Claude Sonnet 5 and Qwen3.8-Flash-Next are closely matched at 49.3 and 50.5 on the LLM Stats Score.

Anthropic · Alibaba Cloud / Qwen Team · Updated for 2026

Which is better?

Claude Sonnet 5 and Qwen3.8-Flash-Next are closely matched on the overall LLM Stats Score at 49.3 and 50.5.

In the 6 individual benchmarks reported for both models, Qwen3.8-Flash-Next wins 4; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Sonnet 5

  • you want predictable pricing at $2.00/M input and $10.00/M output

Choose Qwen3.8-Flash-Next

  • you value its reported benchmark strengths — it wins 4 of 6 exact shared results
  • you want the most recent training data — it shipped Aug 2026
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Sonnet 5
Anthropic
Qwen3.8-Flash-Next
Alibaba Cloud / Qwen Team
Core performance indexes
LLM Stats Score
49.3
#15
50.5
#14
Reasoning
48.8
#16
50.6
#12
Coding
39.8
#14
38.4
#19
Agents
33.7
#19
37.2
#12
Cost, coverage & limits
Benchmark wins
2 of 6
4 of 6
Input price
$2.00 / M
— / M
Output price
$10.00 / M
— / M
Context window
1,000,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

4 shared
Index
Claude Sonnet 5
Qwen3.8-Flash-Next
Math
36.5#36
33.3#50
Vision
34.4#12
34.6#11
Tool use
25.6#27
32.3#8
Multimodal
32.6#17
35.3#8
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

22 reported for Claude Sonnet 5 · 22 for Qwen3.8-Flash-Next

6 shared

Claude Sonnet 5 outperforms in 2 benchmarks (Humanity's Last Exam, SWE-Bench Pro), while Qwen3.8-Flash-Next is better at 4 benchmarks (CharXiv-R, DeepSWE 1.1, SWE-bench Multilingual, Toolathlon).

Qwen3.8-Flash-Next shows notably better performance in the majority of benchmarks.

Fri Aug 28 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Sonnet 5 specifies input context (1,000,000 tokens). Only Claude Sonnet 5 specifies output context (64,000 tokens).

Anthropic
Claude Sonnet 5
Input1,000,000 tokens
Output64,000 tokens
Alibaba Cloud / Qwen Team
Qwen3.8-Flash-Next
Input- tokens
Output- tokens
Fri Aug 28 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Sonnet 5 and Qwen3.8-Flash-Next support multimodal inputs.

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

Claude Sonnet 5

Text
Images
Audio
Video

Qwen3.8-Flash-Next

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Sonnet 5 is licensed under a proprietary license, 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.

Claude Sonnet 5

Proprietary

Closed source

Qwen3.8-Flash-Next

Qwen Community License 1.0

Open weights

Release Timeline

When each model was launched

Claude Sonnet 5 was released on 2026-06-30, while Qwen3.8-Flash-Next was released on 2026-08-26.

Qwen3.8-Flash-Next is 2 months newer than Claude Sonnet 5.

Claude Sonnet 5

Jun 30, 2026

1 months ago

Qwen3.8-Flash-Next

Aug 26, 2026

2 days ago

1mo 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 Claude Sonnet 5 and Qwen3.8-Flash-Next side-by-side, then vote on the output you prefer.

Claude Sonnet 5
✓ Preferred
Qwen3.8-Flash-Next
Open in Playground

FAQ

Common questions about Claude Sonnet 5 vs Qwen3.8-Flash-Next.

Which is better, Claude Sonnet 5 or Qwen3.8-Flash-Next?

Claude Sonnet 5 and Qwen3.8-Flash-Next are closely matched on the LLM Stats Score at 49.3 and 50.5. Claude Sonnet 5 is made by Anthropic and Qwen3.8-Flash-Next is made by Alibaba Cloud / Qwen Team. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Sonnet 5 compare to Qwen3.8-Flash-Next in benchmarks?

Claude Sonnet 5 scores CharXiv-R: 88.3%, ChartMuseum: 86.7%, SWE-Bench Verified: 85.2%, BrowseComp: 84.7%, GDP.pdf: 81.6%. 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 context window sizes for Claude Sonnet 5 and Qwen3.8-Flash-Next?

Claude Sonnet 5 supports 1.0M tokens and Qwen3.8-Flash-Next supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Sonnet 5 and Qwen3.8-Flash-Next?

Key differences include LLM Stats Score (49.3 vs 50.5), licensing (Proprietary vs Qwen Community License 1.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 5 and Qwen3.8-Flash-Next?

Claude Sonnet 5 is developed by Anthropic and Qwen3.8-Flash-Next is developed by Alibaba Cloud / Qwen Team.

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