Key Takeaways
Kimi K2 0905 (exacto) wins:
- Cheaper input tokens
- Cheaper output tokens
- Larger context window
- Faster response time
Grok 4 wins:
- Higher intelligence benchmark
- Better at coding
- Better at math
- Supports vision
Price Advantage
Kimi K2 0905 (exacto)
Benchmark Advantage
Grok 4
Context Window
Kimi K2 0905 (exacto)
Speed
Kimi K2 0905 (exacto)
Pricing Comparison
Price Comparison
| Metric | Kimi K2 0905 (exacto) | Grok 4 | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $0.39 | $3.00 | Kimi K2 0905 (exacto) |
| Output (per 1M tokens) | $1.90 | $15.00 | Kimi K2 0905 (exacto) |
| Cache Read (per 1M) | N/A | $750000.00 | Grok 4 |
Using a 3:1 input/output ratio, Kimi K2 0905 (exacto) is 87% cheaper overall.
Kimi K2 0905 (exacto) Providers
Chutes $0.39 (Cheapest)
SiliconFlow $0.40
DeepInfra $0.40
Parasail $0.59
AtlasCloud $0.60
Grok 4 Providers
Vercel $3.00 (Cheapest)
xAI $3.00 (Cheapest)
Benchmark Comparison
8
Benchmarks Compared
0
Kimi K2 0905 (exacto) Wins
6
Grok 4 Wins
Benchmark Scores
| Benchmark | Kimi K2 0905 (exacto) | Grok 4 | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 30.8 | 41.4 | |
Coding Index Code generation & understanding | 25.9 | 40.5 | |
Math Index Mathematical reasoning | 57.3 | 92.7 | |
MMLU Pro Academic knowledge | 81.9 | 86.6 | |
GPQA Graduate-level science | 76.7 | 87.7 | |
LiveCodeBench Competitive programming | 61.0 | 81.9 | |
Aider Real-world code editing | - | 79.6 | - |
AIME Competition math | - | 94.3 | - |
Grok 4 significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
Y-axis:
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Kimi K2 0905 (exacto)
Other models
Context & Performance
Context Window
Kimi K2 0905 (exacto)
262,144
tokens
Max output: 262,144 tokens
Grok 4
256,000
tokens
Kimi K2 0905 (exacto) has a 2% larger context window.
Speed Performance
| Metric | Kimi K2 0905 (exacto) | Grok 4 | Winner |
|---|---|---|---|
| Tokens/second | 51.7 tok/s | 33.9 tok/s | |
| Time to First Token | 0.54s | 8.24s |
Kimi K2 0905 (exacto) responds 52% faster on average.
Capabilities
Feature Comparison
| Feature | Kimi K2 0905 (exacto) | Grok 4 |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Kimi K2 0905 (exacto) | Grok 4 |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Moonshotai | Xai |
| Released | Sep 2025 | Jul 2025 |
Kimi K2 0905 (exacto) Modalities
Input
text
Output
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Grok 4 Modalities
Input
imagetext
Output
text