Grok 4.20 vs GPT-5.4 mini
Pricing, context window, and benchmark comparison · Last updated April 2026
GPT-5.4 mini is cheaper than Grok 4.20 at $0.75/1M/1M vs $2.00/1M/1M input tokens — a 2.7x cost difference. Grok 4.20 scores higher on quality benchmarks (ELO 1380). Choose GPT-5.4 mini for cost-sensitive workloads; choose Grok 4.20 for maximum quality.
Which is cheaper: Grok 4.20 or GPT-5.4 mini?
GPT-5.4 mini is the cheaper option at $0.75/1M per 1M input tokens, compared to $2.00/1M for Grok 4.20. That is a 2.7x cost difference on input tokens. Output pricing follows a similar pattern: Grok 4.20 charges $6.00/1M/1M vs $4.50/1M/1M for GPT-5.4 mini.
Which has better quality: Grok 4.20 or GPT-5.4 mini?
Based on LMSYS Chatbot Arena rankings, Grok 4.20 achieves a higher ELO score (1380 vs 1360), suggesting stronger performance on open-ended tasks. Grok 4.20 excels at 2m token context window — tied for largest available. GPT-5.4 mini is known for strong mid-tier quality close to gpt-5.4 at 1/3 the price.
Which should you choose: Grok 4.20 or GPT-5.4 mini?
- → 2M token context window — tied for largest available
- → Real-time X (Twitter) data access
- → Strong reasoning and multi-agent variants
- → 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
Frequently Asked Questions
Which is cheaper: Grok 4.20 or GPT-5.4 mini?
GPT-5.4 mini is cheaper at $0.75/1M per 1M input tokens, making it 2.7x more affordable.
Which has better quality: Grok 4.20 or GPT-5.4 mini?
Grok 4.20 scores higher on the LMSYS Chatbot Arena with an ELO of 1380, suggesting better overall quality for most tasks.
Which has a larger context window: Grok 4.20 or GPT-5.4 mini?
Grok 4.20 has a larger context window at 2000K tokens.
Should I choose Grok 4.20 or GPT-5.4 mini?
Choose GPT-5.4 mini if cost is the priority. Choose Grok 4.20 if benchmark quality is most important. Consider your specific use case: Grok 4.20 is best for reasoning and research, while GPT-5.4 mini excels at customer-support and data-extraction.
Is Grok 4.20 or GPT-5.4 mini open source?
Grok 4.20 is proprietary. GPT-5.4 mini is proprietary.