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Model Comparison

GPT OSS 20B vs Qwen3.8 MaxWhich is better in 2026?

Qwen3.8 Max significantly outperforms across most benchmarks.

Verdict: GPT OSS 20B vs Qwen3.8 Max — which is better?

GPT OSS 20B (by OpenAI) and Qwen3.8 Max (by Alibaba Cloud / Qwen Team) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

GPT OSS 20B outperforms in 0 benchmarks, while Qwen3.8 Max is better at 3 benchmarks (GPQA, HealthBench, Humanity's Last Exam). Qwen3.8 Max significantly outperforms across most benchmarks.

Choose GPT OSS 20B if…

  • you need open weights you can self-host or fine-tune

Choose Qwen3.8 Max if…

  • you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
  • you want the most recent training data — it shipped Aug 2026

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

GPT OSS 20B outperforms in 0 benchmarks, while Qwen3.8 Max is better at 3 benchmarks (GPQA, HealthBench, Humanity's Last Exam).

Qwen3.8 Max significantly outperforms across most benchmarks.

Thu Aug 06 2026 • llm-stats.com

Arena Performance

Human preference votes

Model Size

Parameter count comparison

2379.1B diff

Qwen3.8 Max has 2379.1B more parameters than GPT OSS 20B, making it 11383.3% larger.

OpenAI
GPT OSS 20B
20.9Bparameters
Alibaba Cloud / Qwen Team
Qwen3.8 Max
2.4Tparameters
20.9B
GPT OSS 20B
2400.0B
Qwen3.8 Max

Context Window

Maximum input and output token capacity

Only GPT OSS 20B specifies input context (131,072 tokens). Only GPT OSS 20B specifies output context (32,768 tokens).

OpenAI
GPT OSS 20B
Input131,072 tokens
Output32,768 tokens
Alibaba Cloud / Qwen Team
Qwen3.8 Max
Input- tokens
Output- tokens
Thu Aug 06 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Qwen3.8 Max supports multimodal inputs, whereas GPT OSS 20B does not.

Qwen3.8 Max can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT OSS 20B

Text
Images
Audio
Video

Qwen3.8 Max

Text
Images
Audio
Video

License

Usage and distribution terms

GPT OSS 20B is licensed under Apache 2.0, while Qwen3.8 Max uses a proprietary license.

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

GPT OSS 20B

Apache 2.0

Open weights

Qwen3.8 Max

Proprietary

Closed source

Release Timeline

When each model was launched

GPT OSS 20B was released on 2025-08-05, while Qwen3.8 Max was released on 2026-08-02.

Qwen3.8 Max is 12 months newer than GPT OSS 20B.

GPT OSS 20B

Aug 5, 2025

1.0 years ago

Qwen3.8 Max

Aug 2, 2026

4 days ago

12mo 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→

Key Takeaways

OpenAI
Larger context window (131,072 tokens)
Has open weights
Alibaba Cloud / Qwen Team

Qwen3.8 Max

View details

Alibaba Cloud / Qwen Team

Supports multimodal inputs
Higher GPQA score (92.6% vs 71.5%)
Higher HealthBench score (60.2% vs 42.5%)
Higher Humanity's Last Exam score (43.6% vs 10.9%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT OSS 20B and Qwen3.8 Max side-by-side, then vote on the output you prefer.

GPT OSS 20B
✓ Preferred
Qwen3.8 Max
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT OSS 20B
Alibaba Cloud / Qwen Team
Qwen3.8 Max

FAQ

Common questions about GPT OSS 20B vs Qwen3.8 Max.

Which is better, GPT OSS 20B or Qwen3.8 Max?

Qwen3.8 Max significantly outperforms across most benchmarks. GPT OSS 20B is made by OpenAI and Qwen3.8 Max 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 OSS 20B compare to Qwen3.8 Max in benchmarks?

GPT OSS 20B scores MMLU: 85.3%, CodeForces: 74.3%, GPQA: 71.5%, TAU-bench Retail: 54.8%, HealthBench: 42.5%. Qwen3.8 Max scores PaperBench: 93.0%, GPQA: 92.6%, VideoMME w sub.: 90.4%, RealWorldQA: 88.0%, Terminal-Bench 2.1: 86.6%.

What are the context window sizes for GPT OSS 20B and Qwen3.8 Max?

GPT OSS 20B supports 131K tokens and Qwen3.8 Max 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 OSS 20B and Qwen3.8 Max?

Key differences include multimodal support (no vs yes), licensing (Apache 2.0 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT OSS 20B and Qwen3.8 Max?

GPT OSS 20B is developed by OpenAI and Qwen3.8 Max is developed by Alibaba Cloud / Qwen Team.

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