Claude Haiku 4.5 vs Grok 4.1 Fast
Pricing, context window, and benchmark comparison · Last updated April 2026
Grok 4.1 Fast is cheaper than Claude Haiku 4.5 at $0.20/1M/1M vs $1.00/1M/1M input tokens — a 5.0x cost difference. Claude Haiku 4.5 scores higher on quality benchmarks (ELO 1320). Choose Grok 4.1 Fast for cost-sensitive workloads; choose Claude Haiku 4.5 for maximum quality.
Which is cheaper: Claude Haiku 4.5 or Grok 4.1 Fast?
Grok 4.1 Fast is the cheaper option at $0.20/1M per 1M input tokens, compared to $1.00/1M for Claude Haiku 4.5. That is a 5.0x cost difference on input tokens. Output pricing follows a similar pattern: Claude Haiku 4.5 charges $5.00/1M/1M vs $0.50/1M/1M for Grok 4.1 Fast.
Which has better quality: Claude Haiku 4.5 or Grok 4.1 Fast?
Based on LMSYS Chatbot Arena rankings, Claude Haiku 4.5 achieves a higher ELO score (1320 vs 1305), suggesting stronger performance on open-ended tasks. Claude Haiku 4.5 excels at near-frontier intelligence at the lowest claude price tier. 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 Haiku 4.5 or Grok 4.1 Fast?
- → Near-frontier intelligence at the lowest Claude price tier
- → Fastest Claude model
- → 200K context window
- → 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 Haiku 4.5 or Grok 4.1 Fast?
Grok 4.1 Fast is cheaper at $0.20/1M per 1M input tokens, making it 5.0x more affordable.
Which has better quality: Claude Haiku 4.5 or Grok 4.1 Fast?
Claude Haiku 4.5 scores higher on the LMSYS Chatbot Arena with an ELO of 1320, suggesting better overall quality for most tasks.
Which has a larger context window: Claude Haiku 4.5 or Grok 4.1 Fast?
Grok 4.1 Fast has a larger context window at 2000K tokens.
Should I choose Claude Haiku 4.5 or Grok 4.1 Fast?
Choose Grok 4.1 Fast if cost is the priority. Choose Claude Haiku 4.5 if benchmark quality is most important. Consider your specific use case: Claude Haiku 4.5 is best for fast-response and customer-support, while Grok 4.1 Fast excels at long-context and low-cost.
Is Claude Haiku 4.5 or Grok 4.1 Fast open source?
Claude Haiku 4.5 is proprietary. Grok 4.1 Fast is proprietary.