Anthropic: Claude Opus 4.5 vs xAI: Grok 3 Beta
Side-by-side comparison of Anthropic: Claude Opus 4.5 and xAI: Grok 3 Beta. Compare pricing, context window, capabilities, and find out which is better for your workflow.
Verdict
strong confidenceAnthropic: Claude Opus 4.5 leads overall
Anthropic: Claude Opus 4.5 leads in context window and capabilities and max output, making it the stronger choice for most workflows. xAI: Grok 3 Beta remains competitive with advantages in price.
Best for with Anthropic: Claude Opus 4.5
Best for with xAI: Grok 3 Beta
Side-by-side
Technical specifications
| Anthropic: Claude Opus 4.5 | xAI: Grok 3 Beta | |
|---|---|---|
| Provider | Anthropic | xAI |
| Input price | $5/M | $3/M |
| Output price | $25/M | $15/M |
| Context window | 200K | 131K |
| Max output | 64K | N/A |
| Capabilities | Tool useVisionReasoning | Tool use |
| Released | Nov 24, 2025 | Apr 9, 2025 |
Scoring breakdown
How each dimension compares
Price
xAI: Grok 3 Beta leadsAnthropic: Claude Opus 4.5
$25/M tokens
xAI: Grok 3 Beta
$15/M tokens
Context Window
Anthropic: Claude Opus 4.5 leadsAnthropic: Claude Opus 4.5
200K tokens
xAI: Grok 3 Beta
131K tokens
Capabilities
Anthropic: Claude Opus 4.5 leadsAnthropic: Claude Opus 4.5
3/4
xAI: Grok 3 Beta
1/4
Max Output
Anthropic: Claude Opus 4.5 leadsAnthropic: Claude Opus 4.5
64K tokens
xAI: Grok 3 Beta
N/A
Recency
Anthropic: Claude Opus 4.5
Nov 2025
xAI: Grok 3 Beta
Apr 2025
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