Claude Sonnet 4.6 vs Grok 4.1 Fast
Pricing, context window, and benchmark comparison · Last updated April 2026
Grok 4.1 Fast is cheaper than Claude Sonnet 4.6 at $0.20/1M/1M vs $3.00/1M/1M input tokens — a 15.0x cost difference. Claude Sonnet 4.6 scores higher on quality benchmarks (ELO 1390). Choose Grok 4.1 Fast for cost-sensitive workloads; choose Claude Sonnet 4.6 for maximum quality.
Which is cheaper: Claude Sonnet 4.6 or Grok 4.1 Fast?
Grok 4.1 Fast is the cheaper option at $0.20/1M per 1M input tokens, compared to $3.00/1M for Claude Sonnet 4.6. That is a 15.0x cost difference on input tokens. Output pricing follows a similar pattern: Claude Sonnet 4.6 charges $15.00/1M/1M vs $0.50/1M/1M for Grok 4.1 Fast.
Which has better quality: Claude Sonnet 4.6 or Grok 4.1 Fast?
Based on LMSYS Chatbot Arena rankings, Claude Sonnet 4.6 achieves a higher ELO score (1390 vs 1305), suggesting stronger performance on open-ended tasks. Claude Sonnet 4.6 excels at best combination of speed and intelligence in the claude family. Grok 4.1 Fast is known for 2m token context at $0.20/$0.50 per 1m — unbeatable for long context.
Which should you choose: Claude Sonnet 4.6 or Grok 4.1 Fast?
- → Best combination of speed and intelligence in the Claude family
- → 1M token context window at standard pricing
- → Extended thinking and adaptive thinking supported
- → 2M token context at $0.20/$0.50 per 1M — unbeatable for long context
- → Very fast inference
- → Real-time X data access
Frequently Asked Questions
Which is cheaper: Claude Sonnet 4.6 or Grok 4.1 Fast?
Grok 4.1 Fast is cheaper at $0.20/1M per 1M input tokens, making it 15.0x more affordable.
Which has better quality: Claude Sonnet 4.6 or Grok 4.1 Fast?
Claude Sonnet 4.6 scores higher on the LMSYS Chatbot Arena with an ELO of 1390, suggesting better overall quality for most tasks.
Which has a larger context window: Claude Sonnet 4.6 or Grok 4.1 Fast?
Grok 4.1 Fast has a larger context window at 2000K tokens.
Should I choose Claude Sonnet 4.6 or Grok 4.1 Fast?
Choose Grok 4.1 Fast if cost is the priority. Choose Claude Sonnet 4.6 if benchmark quality is most important. Consider your specific use case: Claude Sonnet 4.6 is best for coding and function-calling, while Grok 4.1 Fast excels at long-context and low-cost.
Is Claude Sonnet 4.6 or Grok 4.1 Fast open source?
Claude Sonnet 4.6 is proprietary. Grok 4.1 Fast is proprietary.