Grok-4 Heavy vs Qwen3.8 Max
Qwen3.8 Max leads the LLM Stats Score 51.9 to 40.7.
xAI · Alibaba Cloud / Qwen Team · Updated for 2026
Which is better?
Qwen3.8 Max leads the overall LLM Stats Score 51.9 to 40.7, ranking #11 overall.
The models split the 2 individual benchmarks reported for both models evenly.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Grok-4 Heavy
- you are already invested in the xAI ecosystem
Choose Qwen3.8 Max
- overall performance matters — it scores 51.9 and ranks #11 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
6 reported for Grok-4 Heavy · 42 for Qwen3.8 Max
Grok-4 Heavy outperforms in 1 benchmarks (Humanity's Last Exam), while Qwen3.8 Max is better at 1 benchmark (GPQA).
Both models are evenly matched across the benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only Qwen3.8 Max specifies input context (256,000 tokens). Only Qwen3.8 Max specifies output context (256,000 tokens).
Input capabilities
Documented input modalities across available providers
Both Grok-4 Heavy and Qwen3.8 Max support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Grok-4 Heavy
Qwen3.8 Max
License
Usage and distribution terms
Grok-4 Heavy 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
Qwen3.8 Max was released on 2026-08-02, while Grok-4 Heavy's release date is not specified.
We can confirm Qwen3.8 Max's release timeline, but cannot make a direct age comparison without Grok-4 Heavy's release date.
—
Aug 2, 2026
1 months ago
Knowledge Cutoff
When training data ends
Grok-4 Heavy has a documented knowledge cutoff of 2024-12-31, while Qwen3.8 Max's cutoff date is not specified.
We can confirm Grok-4 Heavy's training data extends to 2024-12-31, but cannot make a direct comparison without Qwen3.8 Max's cutoff date.
Dec 2024
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Outputs Comparison
Judge for yourself.
Run your own prompts against Grok-4 Heavy and Qwen3.8 Max side-by-side, then vote on the output you prefer.
FAQ
Common questions about Grok-4 Heavy vs Qwen3.8 Max.