Key Takeaways
Kimi K2.5 wins:
- Faster response time
GPT-5 Mini wins:
- Cheaper input tokens
- Cheaper output tokens
- Larger context window
- Higher intelligence benchmark
- Better at coding
- Better at math
- Supports tool calls
Price Advantage
GPT-5 Mini
Benchmark Advantage
GPT-5 Mini
Context Window
GPT-5 Mini
Speed
Kimi K2.5
Pricing Comparison
Price Comparison
| Metric | Kimi K2.5 | GPT-5 Mini | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $0.50 | $0.25 | GPT-5 Mini |
| Output (per 1M tokens) | $2.80 | $2.00 | GPT-5 Mini |
| Cache Read (per 1M) | N/A | $25000.00 | GPT-5 Mini |
Using a 3:1 input/output ratio, GPT-5 Mini is 36% cheaper overall.
Kimi K2.5 Providers
Together $0.50 (Cheapest)
AtlasCloud $0.56
GMICloud $0.57
Novita $0.57
Parasail $0.60
GPT-5 Mini Providers
OpenAI $0.25 (Cheapest)
Azure $0.25 (Cheapest)
Benchmark Comparison
6
Benchmarks Compared
0
Kimi K2.5 Wins
3
GPT-5 Mini Wins
Benchmark Scores
| Benchmark | Kimi K2.5 | GPT-5 Mini | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 37.2 | 41.0 | |
Coding Index Code generation & understanding | 25.8 | 35.3 | |
Math Index Mathematical reasoning | - | 90.7 | - |
MMLU Pro Academic knowledge | - | 83.7 | - |
GPQA Graduate-level science | 78.9 | 82.8 | |
LiveCodeBench Competitive programming | - | 83.8 | - |
GPT-5 Mini significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
Y-axis:
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Other models
Context & Performance
Context Window
Kimi K2.5
262,144
tokens
GPT-5 Mini
400,000
tokens
Max output: 128,000 tokens
GPT-5 Mini has a 34% larger context window.
Speed Performance
| Metric | Kimi K2.5 | GPT-5 Mini | Winner |
|---|---|---|---|
| Tokens/second | 106.7 tok/s | 78.9 tok/s | |
| Time to First Token | 0.87s | 107.34s |
Kimi K2.5 responds 35% faster on average.
Capabilities
Feature Comparison
| Feature | Kimi K2.5 | GPT-5 Mini |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Kimi K2.5 | GPT-5 Mini |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Moonshotai | OpenAI |
| Released | Jan 2026 | Aug 2025 |
Kimi K2.5 Modalities
Input
textimage
Output
text
GPT-5 Mini Modalities
Input
textimagefile
Output
text