Key Takeaways
MiniMax M2.5 wins:
- Cheaper output tokens
- Higher intelligence benchmark
- Better at coding
GPT-5.1-Codex-Mini wins:
- Cheaper input tokens
- Larger context window
- Faster response time
- Better at math
- Supports vision
- Supports tool calls
Price Advantage
MiniMax M2.5
Benchmark Advantage
MiniMax M2.5
Context Window
GPT-5.1-Codex-Mini
Speed
GPT-5.1-Codex-Mini
Pricing Comparison
Price Comparison
| Metric | MiniMax M2.5 | GPT-5.1-Codex-Mini | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $0.30 | $0.25 | GPT-5.1-Codex-Mini |
| Output (per 1M tokens) | $1.20 | $2.00 | MiniMax M2.5 |
| Cache Read (per 1M) | $30000.00 | $25000.00 | GPT-5.1-Codex-Mini |
Using a 3:1 input/output ratio, MiniMax M2.5 is 24% cheaper overall.
MiniMax M2.5 Providers
Minimax $0.30 (Cheapest)
Novita $0.30 (Cheapest)
GPT-5.1-Codex-Mini Providers
OpenAI $0.25 (Cheapest)
Azure $0.25 (Cheapest)
Benchmark Comparison
6
Benchmarks Compared
3
MiniMax M2.5 Wins
0
GPT-5.1-Codex-Mini Wins
Benchmark Scores
| Benchmark | MiniMax M2.5 | GPT-5.1-Codex-Mini | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 42.0 | 38.5 | |
Coding Index Code generation & understanding | 37.4 | 36.4 | |
Math Index Mathematical reasoning | - | 91.7 | - |
MMLU Pro Academic knowledge | - | 82.0 | - |
GPQA Graduate-level science | 84.8 | 81.3 | |
LiveCodeBench Competitive programming | - | 83.6 | - |
GPT-5.1-Codex-Mini shows stronger mathematical reasoning abilities.
Cost vs Quality
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Other models
Context & Performance
Context Window
MiniMax M2.5
204,800
tokens
Max output: 131,072 tokens
GPT-5.1-Codex-Mini
400,000
tokens
Max output: 100,000 tokens
GPT-5.1-Codex-Mini has a 49% larger context window.
Speed Performance
| Metric | MiniMax M2.5 | GPT-5.1-Codex-Mini | Winner |
|---|---|---|---|
| Tokens/second | 71.0 tok/s | 114.2 tok/s | |
| Time to First Token | 1.67s | 12.88s |
GPT-5.1-Codex-Mini responds 61% faster on average.
Capabilities
Feature Comparison
| Feature | MiniMax M2.5 | GPT-5.1-Codex-Mini |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | MiniMax M2.5 | GPT-5.1-Codex-Mini |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Minimax | OpenAI |
| Released | Feb 2026 | Nov 2025 |
MiniMax M2.5 Modalities
Input
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Output
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GPT-5.1-Codex-Mini Modalities
Input
imagetext
Output
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