The AI arena is free today

Open Superagent

GPT-5.1 Codex High vs Qwen3.8 Max

Comparing GPT-5.1 Codex High and Qwen3.8 Max across benchmarks, pricing, and capabilities.

OpenAI · Alibaba Cloud / Qwen Team · Updated for 2026

Which is better?

GPT-5.1 Codex High and Qwen3.8 Max trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

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

Choose GPT-5.1 Codex High

  • you want predictable pricing at $1.25/M input and $10.00/M output

Choose Qwen3.8 Max

  • 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-5.1 Codex High
OpenAI
Qwen3.8 Max
Alibaba Cloud / Qwen Team
Benchmark wins
—
—
Input price
$1.25 / M
— / M
Output price
$10.00 / M
— / M
Context window
400,000
—
Released
Nov 2025
Aug 2026
License
Proprietary
Qwen3.8-Max License

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GPT-5.1 Codex High and Qwen3.8 Maxdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Playground indexes and blind preference scores

Context Window

Maximum input and output token capacity

Only GPT-5.1 Codex High specifies input context (400,000 tokens). Only GPT-5.1 Codex High specifies output context (128,000 tokens).

OpenAI
GPT-5.1 Codex High
Input400,000 tokens
Output128,000 tokens
Alibaba Cloud / Qwen Team
Qwen3.8 Max
Input- tokens
Output- tokens
Tue Aug 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.1 Codex High and Qwen3.8 Max support multimodal inputs.

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

GPT-5.1 Codex High

Text
Images
Audio
Video

Qwen3.8 Max

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.1 Codex High is licensed under a proprietary license, while Qwen3.8 Max uses Qwen3.8-Max License.

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

GPT-5.1 Codex High

Proprietary

Closed source

Qwen3.8 Max

Qwen3.8-Max License

Open weights

Release Timeline

When each model was launched

GPT-5.1 Codex High was released on 2025-11-12, while Qwen3.8 Max was released on 2026-08-02.

Qwen3.8 Max is 9 months newer than GPT-5.1 Codex High.

GPT-5.1 Codex High

Nov 12, 2025

9 months ago

Qwen3.8 Max

Aug 2, 2026

3 weeks ago

8mo 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 GPT-5.1 Codex High and Qwen3.8 Max side-by-side, then vote on the output you prefer.

GPT-5.1 Codex High
✓ Preferred
Qwen3.8 Max
Open in Playground

FAQ

Common questions about GPT-5.1 Codex High vs Qwen3.8 Max.

Which is better, GPT-5.1 Codex High or Qwen3.8 Max?

GPT-5.1 Codex High (OpenAI) and Qwen3.8 Max (Alibaba Cloud / Qwen Team) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GPT-5.1 Codex High compare to Qwen3.8 Max in benchmarks?

GPT-5.1 Codex High scores AIME 2025: 96.7%. Qwen3.8 Max scores PaperBench: 93.0%, MRCR v2 (8-needle): 92.9%, GPQA: 92.6%, VideoMME w sub.: 90.4%, RealWorldQA: 88.0%.

What are the context window sizes for GPT-5.1 Codex High and Qwen3.8 Max?

GPT-5.1 Codex High supports 400K 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-5.1 Codex High and Qwen3.8 Max?

Key differences include licensing (Proprietary vs Qwen3.8-Max License). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.1 Codex High and Qwen3.8 Max?

GPT-5.1 Codex High is developed by OpenAI and Qwen3.8 Max is developed by Alibaba Cloud / Qwen Team.

Related comparisons