GPT-5.4 vs Grok 4.20
Pricing, context window, and benchmark comparison · Last updated April 2026
Grok 4.20 is cheaper than GPT-5.4 at $2.00/1M/1M vs $2.50/1M/1M input tokens — a 1.3x cost difference. GPT-5.4 scores higher on quality benchmarks (ELO 1420). Choose Grok 4.20 for cost-sensitive workloads; choose GPT-5.4 for maximum quality.
Which is cheaper: GPT-5.4 or Grok 4.20?
Grok 4.20 is the cheaper option at $2.00/1M per 1M input tokens, compared to $2.50/1M for GPT-5.4. That is a 1.3x cost difference on input tokens. Output pricing follows a similar pattern: GPT-5.4 charges $15.00/1M/1M vs $6.00/1M/1M for Grok 4.20.
Which has better quality: GPT-5.4 or Grok 4.20?
Based on LMSYS Chatbot Arena rankings, GPT-5.4 achieves a higher ELO score (1420 vs 1380), suggesting stronger performance on open-ended tasks. GPT-5.4 excels at openai flagship — top-tier reasoning, coding, and multimodal. Grok 4.20 is known for 2m token context window — tied for largest available.
Which should you choose: GPT-5.4 or Grok 4.20?
- → OpenAI flagship — top-tier reasoning, coding, and multimodal
- → Native computer use and tool search
- → 272K standard context (expandable to 1M)
- → 2M token context window — tied for largest available
- → Real-time X (Twitter) data access
- → Strong reasoning and multi-agent variants
Frequently Asked Questions
Which is cheaper: GPT-5.4 or Grok 4.20?
Grok 4.20 is cheaper at $2.00/1M per 1M input tokens, making it 1.3x more affordable.
Which has better quality: GPT-5.4 or Grok 4.20?
GPT-5.4 scores higher on the LMSYS Chatbot Arena with an ELO of 1420, suggesting better overall quality for most tasks.
Which has a larger context window: GPT-5.4 or Grok 4.20?
Grok 4.20 has a larger context window at 2000K tokens.
Should I choose GPT-5.4 or Grok 4.20?
Choose Grok 4.20 if cost is the priority. Choose GPT-5.4 if benchmark quality is most important. Consider your specific use case: GPT-5.4 is best for coding and reasoning, while Grok 4.20 excels at reasoning and research.
Is GPT-5.4 or Grok 4.20 open source?
GPT-5.4 is proprietary. Grok 4.20 is proprietary.