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GPT-5.5 vs Qwen3.8-27B

GPT-5.5 has a slight edge in benchmark performance.

OpenAI · Alibaba Cloud / Qwen Team · Updated for 2026

Which is better?

GPT-5.5 outperforms in 3 benchmarks (DeepSWE 1.1, GPQA, Humanity's Last Exam), while Qwen3.8-27B is better at 2 benchmarks (OSWorld-Verified, SWE-Bench Pro). GPT-5.5 has a slight edge in benchmark performance.

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

Choose GPT-5.5

  • you want the strongest raw capability — it leads on 3 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.

GPT-5.5
OpenAI
Qwen3.8-27B
Alibaba Cloud / Qwen Team
Benchmark wins
3 of 5
2 of 5
Input price
$5.00 / M
— / M
Output price
$30.00 / M
— / M
Context window
1,050,000
—
Released
Apr 2026
Aug 2026
License
Proprietary
Apache 2.0

Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

GPT-5.5 outperforms in 3 benchmarks (DeepSWE 1.1, GPQA, Humanity's Last Exam), while Qwen3.8-27B is better at 2 benchmarks (OSWorld-Verified, SWE-Bench Pro).

GPT-5.5 has a slight edge in benchmark performance.

Tue Aug 25 2026 • llm-stats.com

Arena Performance

Playground indexes and blind preference scores

Context Window

Maximum input and output token capacity

Only GPT-5.5 specifies input context (1,050,000 tokens). Only GPT-5.5 specifies output context (128,000 tokens).

OpenAI
GPT-5.5
Input1,050,000 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 GPT-5.5 and Qwen3.8-27B support multimodal inputs.

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

GPT-5.5

Text
Images
Audio
Video

Qwen3.8-27B

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.5 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.

GPT-5.5

Proprietary

Closed source

Qwen3.8-27B

Apache 2.0

Open weights

Release Timeline

When each model was launched

GPT-5.5 was released on 2026-04-23, while Qwen3.8-27B was released on 2026-08-14.

Qwen3.8-27B is 4 months newer than GPT-5.5.

GPT-5.5

Apr 23, 2026

4 months ago

Qwen3.8-27B

Aug 14, 2026

1 weeks ago

3mo newer

Knowledge Cutoff

When training data ends

GPT-5.5 has a documented knowledge cutoff of 2025-12-01, while Qwen3.8-27B's cutoff date is not specified.

We can confirm GPT-5.5's training data extends to 2025-12-01, but cannot make a direct comparison without Qwen3.8-27B's cutoff date.

GPT-5.5

Dec 2025

Qwen3.8-27B

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against GPT-5.5 and Qwen3.8-27B side-by-side, then vote on the output you prefer.

GPT-5.5
✓ Preferred
Qwen3.8-27B
Open in Playground

FAQ

Common questions about GPT-5.5 vs Qwen3.8-27B.

Which is better, GPT-5.5 or Qwen3.8-27B?

GPT-5.5 has a slight edge in benchmark performance. GPT-5.5 is made by OpenAI 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 GPT-5.5 compare to Qwen3.8-27B in benchmarks?

GPT-5.5 scores Tau2 Telecom: 98.0%, ARC-AGI: 95.0%, GPQA: 93.6%, ARC-AGI v2: 85.0%, GDPval-MM: 84.9%. 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 GPT-5.5 and Qwen3.8-27B?

GPT-5.5 supports 1.1M 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 GPT-5.5 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 GPT-5.5 and Qwen3.8-27B?

GPT-5.5 is developed by OpenAI and Qwen3.8-27B is developed by Alibaba Cloud / Qwen Team.

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