Key Takeaways
Claude 3.5 Sonnet wins:
- No clear advantages in compared metrics
Grok 4 wins:
- Cheaper input tokens
- Cheaper output tokens
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
Price Advantage
Grok 4
Benchmark Advantage
Grok 4
Context Window
Grok 4
Speed
Grok 4
Pricing Comparison
Price Comparison
| Metric | Claude 3.5 Sonnet | Grok 4 | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $6.00 | $3.00 | Grok 4 |
| Output (per 1M tokens) | $30.00 | $15.00 | Grok 4 |
| Cache Read (per 1M) | N/A | $750000.00 | Grok 4 |
Using a 3:1 input/output ratio, Grok 4 is 50% cheaper overall.
Claude 3.5 Sonnet Providers
Vercel $3.00 (Cheapest)
Amazon Bedrock $6.00
Grok 4 Providers
Vercel $3.00 (Cheapest)
xAI $3.00 (Cheapest)
Benchmark Comparison
8
Benchmarks Compared
1
Claude 3.5 Sonnet Wins
6
Grok 4 Wins
Benchmark Scores
| Benchmark | Claude 3.5 Sonnet | Grok 4 | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 15.9 | 41.4 | |
Coding Index Code generation & understanding | 30.2 | 40.5 | |
Math Index Mathematical reasoning | - | 92.7 | - |
MMLU Pro Academic knowledge | 77.2 | 86.6 | |
GPQA Graduate-level science | 59.9 | 87.7 | |
LiveCodeBench Competitive programming | 38.1 | 81.9 | |
Aider Real-world code editing | 84.2 | 79.6 | |
AIME Competition math | 15.7 | 94.3 |
Grok 4 significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
Y-axis:
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Claude 3.5 Sonnet
Other models
Context & Performance
Context Window
Claude 3.5 Sonnet
200,000
tokens
Max output: 8,192 tokens
Grok 4
256,000
tokens
Grok 4 has a 22% larger context window.
Speed Performance
| Metric | Claude 3.5 Sonnet | Grok 4 | Winner |
|---|---|---|---|
| Tokens/second | 0.0 tok/s | 38.5 tok/s | |
| Time to First Token | 0.00s | 15.96s |
Grok 4 responds Infinity% faster on average.
Capabilities
Feature Comparison
| Feature | Claude 3.5 Sonnet | Grok 4 |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Claude 3.5 Sonnet | Grok 4 |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Anthropic | Xai |
| Released | Oct 2024 | Jul 2025 |
Claude 3.5 Sonnet Modalities
Input
textimagefile
Output
text
Grok 4 Modalities
Input
imagetext
Output
text