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Claude Sonnet 5.5 vs Qwen3.8 Omni Flash

Claude Sonnet 5.5 leads the LLM Stats Score 58.3 to 37.8.

Anthropic · Alibaba Cloud / Qwen Team · Updated for 2026

Which is better?

Claude Sonnet 5.5 leads the overall LLM Stats Score 58.3 to 37.8, ranking #2 overall.

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

Choose Claude Sonnet 5.5

  • overall performance matters — it scores 58.3 and ranks #2 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Qwen3.8 Omni Flash

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

At a glance

The differences that matter most.

Claude Sonnet 5.5
Anthropic
Qwen3.8 Omni Flash
Alibaba Cloud / Qwen Team
Core performance indexes
LLM Stats Score
58.3
#2
37.8
#79
Reasoning
56.8
#2
32.2
#117
Agents
42.5
#3
21.0
#73
Cost, coverage & limits
Benchmark wins
—
—
Input price
$2.00 / M
— / M
Output price
$10.00 / M
— / M
Context window
1,000,000
—

Individual benchmarks

47 reported for Claude Sonnet 5.5 · 5 for Qwen3.8 Omni Flash

No common benchmarks found

Claude Sonnet 5.5 and Qwen3.8 Omni Flashdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Sonnet 5.5 specifies input context (1,000,000 tokens). Only Claude Sonnet 5.5 specifies output context (128,000 tokens).

Anthropic
Claude Sonnet 5.5
Input1,000,000 tokens
Output128,000 tokens
Alibaba Cloud / Qwen Team
Qwen3.8 Omni Flash
Input- tokens
Output- tokens
Thu Oct 08 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Sonnet 5.5 and Qwen3.8 Omni Flash support multimodal inputs.

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

Claude Sonnet 5.5

Text
Images
Audio
Video

Qwen3.8 Omni Flash

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Sonnet 5.5

Proprietary

Closed source

Qwen3.8 Omni Flash

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 5.5 was released on 2026-09-28, while Qwen3.8 Omni Flash was released on 2026-09-18.

Claude Sonnet 5.5 is 0 month newer than Qwen3.8 Omni Flash.

Claude Sonnet 5.5

Sep 28, 2026

1 weeks ago

1w newer
Qwen3.8 Omni Flash

Sep 18, 2026

2 weeks ago

Knowledge Cutoff

When training data ends

Claude Sonnet 5.5 has a documented knowledge cutoff of 2026-06-01, while Qwen3.8 Omni Flash's cutoff date is not specified.

We can confirm Claude Sonnet 5.5's training data extends to 2026-06-01, but cannot make a direct comparison without Qwen3.8 Omni Flash's cutoff date.

Claude Sonnet 5.5

Jun 2026

Qwen3.8 Omni Flash

—

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Sonnet 5.5 and Qwen3.8 Omni Flash side-by-side, then vote on the output you prefer.

Claude Sonnet 5.5
✓ Preferred
Qwen3.8 Omni Flash
Open in Playground

FAQ

Common questions about Claude Sonnet 5.5 vs Qwen3.8 Omni Flash.

Which is better, Claude Sonnet 5.5 or Qwen3.8 Omni Flash?

Claude Sonnet 5.5 leads the LLM Stats Score 58.3 to 37.8. Claude Sonnet 5.5 is made by Anthropic and Qwen3.8 Omni Flash 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 5.5 compare to Qwen3.8 Omni Flash in benchmarks?

Claude Sonnet 5.5 scores BenchCAD (with Python tool): 96.3%, ArXivMath (with tools): 95.2%, Global-MMLU: 92.1%, MILU: 91.6%, SWE-bench Multilingual: 90.3%. Qwen3.8 Omni Flash scores VoiceBench Avg: 91.6%, DailyOmni: 85.1%, MMAU: 81.8%, OmniGAIA: 74.0%, WildClawBench: 71.0%.

What are the context window sizes for Claude Sonnet 5.5 and Qwen3.8 Omni Flash?

Claude Sonnet 5.5 supports 1.0M tokens and Qwen3.8 Omni Flash 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 5.5 and Qwen3.8 Omni Flash?

Key differences include LLM Stats Score (58.3 vs 37.8). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 5.5 and Qwen3.8 Omni Flash?

Claude Sonnet 5.5 is developed by Anthropic and Qwen3.8 Omni Flash is developed by Alibaba Cloud / Qwen Team.

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