Grok-2 MinivsGrok 3
xAI vs xAI — Side-by-side model comparison
Head-to-Head Comparison
| Metric | Grok-2 Mini | Grok 3 |
|---|---|---|
| Provider | ||
| Arena Rank | #16 | #5 |
| Context Window | 128K | 128K |
| Input Pricing | $0.30/1M tokens | $3.00/1M tokens |
| Output Pricing | $1.50/1M tokens | $15.00/1M tokens |
| Parameters | Undisclosed | Undisclosed |
| Open Source | No | No |
| Best For | Fast responses, chat, lightweight tasks | Real-time info, reasoning, math |
| Release Date | Aug 13, 2024 | — |
Grok-2 Mini
Grok-2 Mini is xAI's smaller, faster model designed for applications that need quick responses at lower cost. It retains the real-time information capabilities of the larger Grok-2 while offering significantly faster inference times. With a 128K context window, it handles most conversational and analytical tasks efficiently, making it suitable for high-volume production deployments.
View xAI profile →Grok 3
Grok 3 is xAI's frontier AI model, trained on one of the world's largest GPU clusters (100,000 Nvidia H100s). It features real-time access to X (Twitter) data, giving it uniquely current information about world events, public sentiment, and trending topics. The model excels at coding, reasoning, and factual tasks while offering a distinctive personality that includes humor and directness. With strong performance on arena benchmarks, Grok 3 competes directly with GPT-4o and Claude Sonnet. Its differentiator is the real-time information access and willingness to engage with topics that other models may decline. Available through the xAI API and the Grok chatbot on X, it has quickly become one of the most capable models in the market.
View xAI profile →Key Differences: Grok-2 Mini vs Grok 3
Grok 3 ranks higher in arena benchmarks (#5) indicating stronger overall performance.
Grok-2 Mini is 10.0x cheaper on average, making it the better choice for high-volume applications.
When to use Grok-2 Mini
- +Budget is a concern and you need cost efficiency
- +Your use case involves fast responses, chat, lightweight tasks
When to use Grok 3
- +You need the highest quality output based on arena rankings
- +Quality matters more than cost
- +Your use case involves real-time info, reasoning, math
Cost Analysis
At current pricing, Grok-2 Mini is 10.0x more affordable than Grok 3. For a typical enterprise workload processing 100M tokens per month:
Grok-2 Mini monthly cost
$90
100M tokens/mo (50/50 in/out)
Grok 3 monthly cost
$900
100M tokens/mo (50/50 in/out)
The Verdict
Grok-2 Mini wins our head-to-head comparison with 2 out of 5 category wins. It's the stronger choice for fast responses, chat, lightweight tasks, though Grok 3 holds an edge in real-time info, reasoning, math.
Last compared: March 2026 · Data sourced from public benchmarks and official pricing pages