GPT-5.4 mini vs Grok 4.1 Fast
Pricing, context window, and benchmark comparison · Last updated April 2026
Grok 4.1 Fast is cheaper than GPT-5.4 mini at $0.20/1M/1M vs $0.75/1M/1M input tokens — a 3.8x cost difference. GPT-5.4 mini scores higher on quality benchmarks (ELO 1360). Choose Grok 4.1 Fast for cost-sensitive workloads; choose GPT-5.4 mini for maximum quality.
Which is cheaper: GPT-5.4 mini or Grok 4.1 Fast?
Grok 4.1 Fast is the cheaper option at $0.20/1M per 1M input tokens, compared to $0.75/1M for GPT-5.4 mini. That is a 3.8x cost difference on input tokens. Output pricing follows a similar pattern: GPT-5.4 mini charges $4.50/1M/1M vs $0.50/1M/1M for Grok 4.1 Fast.
Which has better quality: GPT-5.4 mini or Grok 4.1 Fast?
Based on LMSYS Chatbot Arena rankings, GPT-5.4 mini achieves a higher ELO score (1360 vs 1305), suggesting stronger performance on open-ended tasks. GPT-5.4 mini excels at strong mid-tier quality close to gpt-5.4 at 1/3 the price. 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: GPT-5.4 mini or Grok 4.1 Fast?
- → Strong mid-tier quality close to GPT-5.4 at 1/3 the price
- → Fast inference and low latency
- → Same 272K context window as flagship
- → 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: GPT-5.4 mini or Grok 4.1 Fast?
Grok 4.1 Fast is cheaper at $0.20/1M per 1M input tokens, making it 3.8x more affordable.
Which has better quality: GPT-5.4 mini or Grok 4.1 Fast?
GPT-5.4 mini scores higher on the LMSYS Chatbot Arena with an ELO of 1360, suggesting better overall quality for most tasks.
Which has a larger context window: GPT-5.4 mini or Grok 4.1 Fast?
Grok 4.1 Fast has a larger context window at 2000K tokens.
Should I choose GPT-5.4 mini or Grok 4.1 Fast?
Choose Grok 4.1 Fast if cost is the priority. Choose GPT-5.4 mini if benchmark quality is most important. Consider your specific use case: GPT-5.4 mini is best for customer-support and data-extraction, while Grok 4.1 Fast excels at long-context and low-cost.
Is GPT-5.4 mini or Grok 4.1 Fast open source?
GPT-5.4 mini is proprietary. Grok 4.1 Fast is proprietary.