Key Takeaways
GPT-5.1-Codex wins:
- Larger context window
- Faster response time
- Better at math
- Supports vision
- Has reasoning mode
- Supports tool calls
MiMo v2 Pro wins:
- Cheaper input tokens
- Cheaper output tokens
- Higher intelligence benchmark
- Better at coding
Price Advantage
MiMo v2 Pro
Benchmark Advantage
MiMo v2 Pro
Context Window
GPT-5.1-Codex
Speed
GPT-5.1-Codex
Pricing Comparison
Price Comparison
| Metric | GPT-5.1-Codex | MiMo v2 Pro | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $1.25 | $1.00 | MiMo v2 Pro |
| Output (per 1M tokens) | $10.00 | $3.00 | MiMo v2 Pro |
| Cache Read (per 1M) | $0.13 | $0.20 | GPT-5.1-Codex |
Using a 3:1 input/output ratio, MiMo v2 Pro is 56% cheaper overall.
GPT-5.1-Codex Providers
No provider data available
MiMo v2 Pro Providers
No provider data available
Benchmark Comparison
6
Benchmarks Compared
0
GPT-5.1-Codex Wins
3
MiMo v2 Pro Wins
Benchmark Scores
| Benchmark | GPT-5.1-Codex | MiMo v2 Pro | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 43.1 | 49.2 | |
Coding Index Code generation & understanding | 36.6 | 41.4 | |
Math Index Mathematical reasoning | 95.7 | - | - |
MMLU Pro Academic knowledge | 86.0 | - | - |
GPQA Graduate-level science | 86.0 | 87.0 | |
LiveCodeBench Competitive programming | 84.9 | - | - |
GPT-5.1-Codex shows stronger mathematical reasoning abilities.
Cost vs Quality
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Y-axis:
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GPT-5.1-Codex
Other models
Context & Performance
Context Window
GPT-5.1-Codex
400,000
tokens
MiMo v2 Pro
N/A
tokens
Speed Performance
| Metric | GPT-5.1-Codex | MiMo v2 Pro | Winner |
|---|---|---|---|
| Tokens/second | 101.6 tok/s | 0.0 tok/s | |
| Time to First Token | 6.68s | 0.00s |
GPT-5.1-Codex responds Infinity% faster on average.
Capabilities
Feature Comparison
| Feature | GPT-5.1-Codex | MiMo v2 Pro |
|---|---|---|
| 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 | MiMo v2 Pro |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | OpenAI | Xiaomi |
| Released | Nov 2025 | Unknown |
GPT-5.1-Codex Modalities
Input
textimage
Output
text
MiMo v2 Pro Modalities
Input
Output