Key Takeaways
Claude Opus 4.6 wins:
- Larger context window
- Higher intelligence benchmark
- Better at coding
- Supports vision
Grok Code Fast 1 wins:
- Cheaper input tokens
- Cheaper output tokens
- Faster response time
- Better at math
Price Advantage
Grok Code Fast 1
Benchmark Advantage
Claude Opus 4.6
Context Window
Claude Opus 4.6
Speed
Grok Code Fast 1
Pricing Comparison
Price Comparison
| Metric | Claude Opus 4.6 | Grok Code Fast 1 | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $5.00 | $0.20 | Grok Code Fast 1 |
| Output (per 1M tokens) | $25.00 | $1.50 | Grok Code Fast 1 |
| Cache Read (per 1M) | $0.50 | $0.02 | Grok Code Fast 1 |
| Cache Write (per 1M) | $6.25 | N/A | Claude Opus 4.6 |
Using a 3:1 input/output ratio, Grok Code Fast 1 is 95% cheaper overall.
Claude Opus 4.6 Providers
No provider data available
Grok Code Fast 1 Providers
No provider data available
Benchmark Comparison
6
Benchmarks Compared
3
Claude Opus 4.6 Wins
0
Grok Code Fast 1 Wins
Benchmark Scores
| Benchmark | Claude Opus 4.6 | Grok Code Fast 1 | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 46.5 | 28.7 | |
Coding Index Code generation & understanding | 47.6 | 23.7 | |
Math Index Mathematical reasoning | - | 43.3 | - |
MMLU Pro Academic knowledge | - | 79.3 | - |
GPQA Graduate-level science | 84.0 | 72.7 | |
LiveCodeBench Competitive programming | - | 65.7 | - |
Claude Opus 4.6 significantly outperforms in coding benchmarks.
Cost vs Quality
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Other models
Context & Performance
Context Window
Claude Opus 4.6
1,000,000
tokens
Grok Code Fast 1
256,000
tokens
Claude Opus 4.6 has a 74% larger context window.
Speed Performance
| Metric | Claude Opus 4.6 | Grok Code Fast 1 | Winner |
|---|---|---|---|
| Tokens/second | 48.1 tok/s | 171.7 tok/s | |
| Time to First Token | 1.68s | 3.27s |
Grok Code Fast 1 responds 257% faster on average.
Capabilities
Feature Comparison
| Feature | Claude Opus 4.6 | Grok Code Fast 1 |
|---|---|---|
| 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 Code Fast 1 |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Anthropic | Xai |
| Released | Feb 2026 | Aug 2025 |
Claude Opus 4.6 Modalities
Input
textimage
Output
text
Grok Code Fast 1 Modalities
Input
text
Output
text