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Claude Fable 5 vs Qwen3.8-27B

Claude Fable 5 significantly outperforms across most benchmarks.

Anthropic · Alibaba Cloud / Qwen Team · Updated for 2026

Which is better?

Claude Fable 5 outperforms in 5 benchmarks (DeepSWE 1.1, Humanity's Last Exam, OSWorld-Verified, SWE-Bench Pro, Terminal-Bench 2.1), while Qwen3.8-27B is better at 0 benchmarks. Claude Fable 5 significantly outperforms across most benchmarks.

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

Choose Claude Fable 5

  • you want the strongest raw capability — it leads on 5 of 5 shared benchmarks

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 Fable 5
Anthropic
Qwen3.8-27B
Alibaba Cloud / Qwen Team
Benchmark wins
5 of 5
0 of 5
Input price
$10.00 / M
— / M
Output price
$50.00 / M
— / M
Context window
1,000,000
—
Released
Jun 2026
Aug 2026
License
Proprietary
Apache 2.0

Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Claude Fable 5 outperforms in 5 benchmarks (DeepSWE 1.1, Humanity's Last Exam, OSWorld-Verified, SWE-Bench Pro, Terminal-Bench 2.1), while Qwen3.8-27B is better at 0 benchmarks.

Claude Fable 5 significantly outperforms across most benchmarks.

Tue Aug 25 2026 • llm-stats.com

Arena Performance

Playground indexes and blind preference scores

Context Window

Maximum input and output token capacity

Only Claude Fable 5 specifies input context (1,000,000 tokens). Only Claude Fable 5 specifies output context (128,000 tokens).

Anthropic
Claude Fable 5
Input1,000,000 tokens
Output128,000 tokens
Alibaba Cloud / Qwen Team
Qwen3.8-27B
Input- tokens
Output- tokens
Tue Aug 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

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

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

Claude Fable 5

Text
Images
Audio
Video

Qwen3.8-27B

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Fable 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 Fable 5

Proprietary

Closed source

Qwen3.8-27B

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Fable 5 was released on 2026-06-09, while Qwen3.8-27B was released on 2026-08-14.

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

Claude Fable 5

Jun 9, 2026

2 months ago

Qwen3.8-27B

Aug 14, 2026

1 weeks ago

2mo 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 Fable 5 and Qwen3.8-27B side-by-side, then vote on the output you prefer.

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

FAQ

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

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

Claude Fable 5 significantly outperforms across most benchmarks. Claude Fable 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 Fable 5 compare to Qwen3.8-27B in benchmarks?

Claude Fable 5 scores SWE-Bench Verified: 95.0%, FrontierSWE: 90.0%, OSWorld-Verified: 85.0%, Terminal-Bench 2.1: 84.3%, SWE-Bench Pro: 80.0%. 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 Fable 5 and Qwen3.8-27B?

Claude Fable 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 Fable 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 Fable 5 and Qwen3.8-27B?

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

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