Key Takeaways
Claude Opus 4.6 wins:
- Larger context window
- Higher intelligence benchmark
- Better at coding
Grok 4 wins:
- Cheaper input tokens
- Cheaper output tokens
- Faster response time
- Better at math
- Supports tool calls
Price Advantage
Grok 4
Benchmark Advantage
Claude Opus 4.6
Context Window
Claude Opus 4.6
Speed
Grok 4
Pricing Comparison
Price Comparison
| Metric | Claude Opus 4.6 | Grok 4 | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $5.00 | $3.00 | Grok 4 |
| Output (per 1M tokens) | $25.00 | $15.00 | Grok 4 |
| Cache Read (per 1M) | $500000.00 | $750000.00 | Claude Opus 4.6 |
| Cache Write (per 1M) | $6250000.00 | N/A | Claude Opus 4.6 |
Using a 3:1 input/output ratio, Grok 4 is 40% cheaper overall.
Claude Opus 4.6 Providers
Amazon Bedrock $5.00 (Cheapest)
Anthropic $5.00 (Cheapest)
Grok 4 Providers
Vercel $3.00 (Cheapest)
xAI $3.00 (Cheapest)
Benchmark Comparison
8
Benchmarks Compared
2
Claude Opus 4.6 Wins
1
Grok 4 Wins
Benchmark Scores
| Benchmark | Claude Opus 4.6 | Grok 4 | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 46.4 | 41.4 | |
Coding Index Code generation & understanding | 47.6 | 40.5 | |
Math Index Mathematical reasoning | - | 92.7 | - |
MMLU Pro Academic knowledge | - | 86.6 | - |
GPQA Graduate-level science | 84.0 | 87.7 | |
LiveCodeBench Competitive programming | - | 81.9 | - |
Aider Real-world code editing | - | 79.6 | - |
AIME Competition math | - | 94.3 | - |
Claude Opus 4.6 significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
Y-axis:
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Other models
Context & Performance
Context Window
Claude Opus 4.6
1,000,000
tokens
Max output: 128,000 tokens
Grok 4
256,000
tokens
Claude Opus 4.6 has a 74% larger context window.
Speed Performance
| Metric | Claude Opus 4.6 | Grok 4 | Winner |
|---|---|---|---|
| Tokens/second | 0.0 tok/s | 40.4 tok/s | |
| Time to First Token | 0.00s | 9.54s |
Grok 4 responds Infinity% faster on average.
Capabilities
Feature Comparison
| Feature | Claude Opus 4.6 | Grok 4 |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Claude Opus 4.6 | Grok 4 |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Anthropic | Xai |
| Released | Feb 2026 | Jul 2025 |
Claude Opus 4.6 Modalities
Input
textimage
Output
text
Grok 4 Modalities
Input
imagetext
Output
text