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Claude Sonnet 5 vs Qwen3.8-27B

Both models are evenly matched across the benchmarks.

Anthropic · Alibaba Cloud / Qwen Team · Updated for 2026

Which is better?

Claude Sonnet 5 outperforms in 3 benchmarks (DeepSWE 1.1, Humanity's Last Exam, SWE-Bench Pro), while Qwen3.8-27B is better at 3 benchmarks (CharXiv-R, OSWorld-Verified, SWE-Bench Multimodal). Both models are evenly matched across the benchmarks.

Based on current benchmark, 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 Qwen3.8-27B

  • 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
Qwen3.8-27B
Alibaba Cloud / Qwen Team
Benchmark wins
3 of 6
3 of 6
Input price
$2.00 / M
— / M
Output price
$10.00 / M
— / M
Context window
1,000,000
—
Released
Jun 2026
Aug 2026
License
Proprietary
Apache 2.0

Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

Claude Sonnet 5 outperforms in 3 benchmarks (DeepSWE 1.1, Humanity's Last Exam, SWE-Bench Pro), while Qwen3.8-27B is better at 3 benchmarks (CharXiv-R, OSWorld-Verified, SWE-Bench Multimodal).

Both models are evenly matched across the benchmarks.

Wed Aug 26 2026 • llm-stats.com

Arena Performance

Playground indexes and blind 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
Qwen3.8-27B
Input- tokens
Output- tokens
Wed Aug 26 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Sonnet 5 and Qwen3.8-27B support multimodal inputs.

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

Claude Sonnet 5

Text
Images
Audio
Video

Qwen3.8-27B

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Sonnet 5 is licensed under a proprietary license, while Qwen3.8-27B uses Apache 2.0.

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

Claude Sonnet 5

Proprietary

Closed source

Qwen3.8-27B

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Sonnet 5 was released on 2026-06-30, while Qwen3.8-27B was released on 2026-08-14.

Qwen3.8-27B is 2 months newer than Claude Sonnet 5.

Claude Sonnet 5

Jun 30, 2026

1 months ago

Qwen3.8-27B

Aug 14, 2026

1 weeks 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 Qwen3.8-27B side-by-side, then vote on the output you prefer.

Claude Sonnet 5
✓ Preferred
Qwen3.8-27B
Open in Playground

FAQ

Common questions about Claude Sonnet 5 vs Qwen3.8-27B.

Which is better, Claude Sonnet 5 or Qwen3.8-27B?

Both models are evenly matched across the benchmarks. Claude Sonnet 5 is made by Anthropic and Qwen3.8-27B 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 Claude Sonnet 5 compare to Qwen3.8-27B 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%. Qwen3.8-27B scores MathVision: 94.6%, OmniDocBench 1.5: 91.1%, LiveCodeBench v6: 90.3%, CharXiv-R: 90.2%, GPQA: 89.2%.

What are the context window sizes for Claude Sonnet 5 and Qwen3.8-27B?

Claude Sonnet 5 supports 1.0M tokens and Qwen3.8-27B 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 Qwen3.8-27B?

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

Who makes Claude Sonnet 5 and Qwen3.8-27B?

Claude Sonnet 5 is developed by Anthropic and Qwen3.8-27B is developed by Alibaba Cloud / Qwen Team.

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