Key Takeaways
GPT-5.1-Codex wins:
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
- Supports vision
Qwen3 Max wins:
- Cheaper input tokens
- Cheaper output tokens
Price Advantage
Qwen3 Max
Benchmark Advantage
GPT-5.1-Codex
Context Window
GPT-5.1-Codex
Speed
GPT-5.1-Codex
Pricing Comparison
Price Comparison
| Metric | GPT-5.1-Codex | Qwen3 Max | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $1.25 | $1.20 | Qwen3 Max |
| Output (per 1M tokens) | $10.00 | $6.00 | Qwen3 Max |
| Cache Read (per 1M) | $125000.00 | $240000.00 | GPT-5.1-Codex |
Using a 3:1 input/output ratio, Qwen3 Max is 30% cheaper overall.
GPT-5.1-Codex Providers
OpenAI $1.25 (Cheapest)
Azure $1.25 (Cheapest)
Qwen3 Max Providers
Alibaba $1.20 (Cheapest)
Benchmark Comparison
6
Benchmarks Compared
6
GPT-5.1-Codex Wins
0
Qwen3 Max Wins
Benchmark Scores
| Benchmark | GPT-5.1-Codex | Qwen3 Max | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 42.2 | 31.3 | |
Coding Index Code generation & understanding | 36.6 | 26.4 | |
Math Index Mathematical reasoning | 95.7 | 80.7 | |
MMLU Pro Academic knowledge | 86.0 | 84.1 | |
GPQA Graduate-level science | 86.0 | 76.4 | |
LiveCodeBench Competitive programming | 84.9 | 76.7 |
GPT-5.1-Codex significantly outperforms in coding benchmarks.
Cost vs Quality
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GPT-5.1-Codex
Other models
Context & Performance
Context Window
GPT-5.1-Codex
400,000
tokens
Max output: 128,000 tokens
Qwen3 Max
256,000
tokens
Max output: 32,768 tokens
GPT-5.1-Codex has a 36% larger context window.
Speed Performance
| Metric | GPT-5.1-Codex | Qwen3 Max | Winner |
|---|---|---|---|
| Tokens/second | 205.8 tok/s | 30.9 tok/s | |
| Time to First Token | 10.36s | 1.98s |
GPT-5.1-Codex responds 565% faster on average.
Capabilities
Feature Comparison
| Feature | GPT-5.1-Codex | Qwen3 Max |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | GPT-5.1-Codex | Qwen3 Max |
|---|---|---|
| License | Proprietary | Open Source |
| Author | OpenAI | Qwen |
| Released | Nov 2025 | Sep 2025 |
GPT-5.1-Codex Modalities
Input
textimage
Output
text
Qwen3 Max Modalities
Input
text
Output
text