Claude 3.5 Sonnet vs Grok 2
Pricing, context window, and benchmark comparison · Last updated April 2026
Grok 2 is cheaper than Claude 3.5 Sonnet at $2.00/1M/1M vs $3.00/1M/1M input tokens — a 1.5x cost difference. Claude 3.5 Sonnet scores higher on quality benchmarks (ELO 1295). Choose Grok 2 for cost-sensitive workloads; choose Claude 3.5 Sonnet for maximum quality.
Which is cheaper: Claude 3.5 Sonnet or Grok 2?
Grok 2 is the cheaper option at $2.00/1M per 1M input tokens, compared to $3.00/1M for Claude 3.5 Sonnet. That is a 1.5x cost difference on input tokens. Output pricing follows a similar pattern: Claude 3.5 Sonnet charges $15.00/1M/1M vs $10.00/1M/1M for Grok 2.
Which has better quality: Claude 3.5 Sonnet or Grok 2?
Based on LMSYS Chatbot Arena rankings, Claude 3.5 Sonnet achieves a higher ELO score (1295 vs 1290), suggesting stronger performance on open-ended tasks. Claude 3.5 Sonnet excels at 200k context window — best for long documents. Grok 2 is known for real-time x (twitter) data access.
Which should you choose: Claude 3.5 Sonnet or Grok 2?
- → 200K context window — best for long documents
- → Industry-leading coding performance
- → Nuanced instruction following
- → Real-time X (Twitter) data access
- → Strong at current events and trending topics
- → Good humor and conversational ability
Frequently Asked Questions
Which is cheaper: Claude 3.5 Sonnet or Grok 2?
Grok 2 is cheaper at $2.00/1M per 1M input tokens, making it 1.5x more affordable.
Which has better quality: Claude 3.5 Sonnet or Grok 2?
Claude 3.5 Sonnet scores higher on the LMSYS Chatbot Arena with an ELO of 1295, suggesting better overall quality for most tasks.
Which has a larger context window: Claude 3.5 Sonnet or Grok 2?
Claude 3.5 Sonnet has a larger context window at 200K tokens.
Should I choose Claude 3.5 Sonnet or Grok 2?
Choose Grok 2 if cost is the priority. Choose Claude 3.5 Sonnet if benchmark quality is most important. Consider your specific use case: Claude 3.5 Sonnet is best for coding and document-analysis, while Grok 2 excels at research and creative-writing.
Is Claude 3.5 Sonnet or Grok 2 open source?
Claude 3.5 Sonnet is proprietary. Grok 2 is proprietary.