Claude 3 Opus vs Grok 3
Compare Anthropic and xAI AI models
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Claude 3 Opus
Grok 3
Cost Differences
Grok 3 costs less than Claude 3 Opus
Feature Comparison
| Feature | Claude 3 Opus | Grok 3 |
|---|---|---|
| Provider | Anthropic | xAI |
| Input Price | $15.00/1M tokens | $3.00/1M tokens |
| Output Price | $75.00/1M tokens | $15.00/1M tokens |
| Context Window | 200,000 tokens | 131,072 tokens |
| Max Output | 4,096 tokens | 131,072 tokens |
| Category | flagship | flagship |
| Capabilities | textvisionreasoning | textvisionreasoningcode |
| Release Date | 3/4/2024 | 2/17/2025 |
Claude 3 Opus vs Grok 3: Which Should You Choose?
Choosing between Claude 3 Opus and Grok 3 depends on your priorities: cost efficiency, context length, or raw capability. Grok 3 is the more affordable option at $3.00/1M input tokens — 80% cheaper than Claude 3 Opus. Meanwhile, Claude 3 Opus offers a significantly larger context window at 200,000 tokens vs 131,072 for Grok 3.
These models come from different providers — Anthropic and xAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Anthropic, switching to xAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
Both models are in the flagship category, making this a direct head-to-head comparison. At scale — say 10,000 requests per day — the cost difference adds up: Grok 3 would save you roughly $12,600.00/month compared to Claude 3 Opus. For startups and indie developers, that difference can be significant.
Output costs matter too. Claude 3 Opus charges $75.00/1M output tokens vs $15.00 for Grok 3. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Grok 3 has the edge here at $15.00/1M output tokens.
Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose Claude 3 Opus when:
- • You need a larger context window (200,000 tokens)
- • You're already using Anthropic's API ecosystem
Choose Grok 3 when:
- • Budget is a primary concern
- • You need more capabilities (code)
- • You need longer outputs (up to 131,072 tokens)
- • You're already using xAI's API ecosystem
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Claude 3 Opus (Anthropic)
Grok 3 (xAI)
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