GPT-5.1 Codex High vs Qwen3.8 Max
Qwen3.8 Max leads the LLM Stats Score 51.9 to 29.4. Qwen3.8 Max is 1.4x cheaper per token.
OpenAI · Alibaba Cloud / Qwen Team · Updated for 2026
Which is better?
Qwen3.8 Max leads the overall LLM Stats Score 51.9 to 29.4, ranking #11 overall.
On price, Qwen3.8 Max is roughly 1.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.1 Codex High also accepts a larger context window (400,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-5.1 Codex High
- you process long inputs — it offers a 400,000 token context window
Choose Qwen3.8 Max
- overall performance matters — it scores 51.9 and ranks #11 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- cost matters — it's about 1.4x cheaper per token
- 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.
Individual benchmarks
1 reported for GPT-5.1 Codex High · 42 for Qwen3.8 Max
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.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.1 Codex High ($1.25/1M tokens) is 1.3x cheaper than Qwen3.8 Max ($1.65/1M tokens).
For output processing, GPT-5.1 Codex High ($10.00/1M tokens) is 2.0x more expensive than Qwen3.8 Max ($4.95/1M tokens).
In conclusion, GPT-5.1 Codex High is more expensive than Qwen3.8 Max.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.1 Codex High accepts 400,000 input tokens compared to Qwen3.8 Max's 256,000 tokens. Qwen3.8 Max can generate longer responses up to 256,000 tokens, while GPT-5.1 Codex High is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
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
Qwen3.8 Max
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.
Proprietary
Closed source
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.
Nov 12, 2025
10 months ago
Aug 2, 2026
1 months ago
8mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
GPT-5.1 Codex High is available from OpenAI. Qwen3.8 Max is available from DeepInfra, Fireworks, Novita, Together.
GPT-5.1 Codex High
Qwen3.8 Max
Outputs Comparison
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.
FAQ
Common questions about GPT-5.1 Codex High vs Qwen3.8 Max.