Grok 4.1 Fast vs GPT-5.4 nano
Pricing, context window, and benchmark comparison · Last updated April 2026
GPT-5.4 nano is cheaper than Grok 4.1 Fast at $0.20/1M/1M vs $0.20/1M/1M input tokens. Grok 4.1 Fast scores higher on quality benchmarks (ELO 1305). Choose GPT-5.4 nano for cost-sensitive workloads; choose Grok 4.1 Fast for maximum quality.
Which is cheaper: Grok 4.1 Fast or GPT-5.4 nano?
Grok 4.1 Fast and GPT-5.4 nano are identically priced at $0.20/1M per 1M input tokens. Output pricing follows a similar pattern: Grok 4.1 Fast charges $0.50/1M/1M vs $1.25/1M/1M for GPT-5.4 nano.
Which has better quality: Grok 4.1 Fast or GPT-5.4 nano?
Based on LMSYS Chatbot Arena rankings, Grok 4.1 Fast achieves a higher ELO score (1305 vs 1280), suggesting stronger performance on open-ended tasks. Grok 4.1 Fast excels at 2m token context at $0.20/$0.50 per 1m — unbeatable for long context. GPT-5.4 nano is known for cheapest openai model — $0.20/1m input.
Which should you choose: Grok 4.1 Fast or GPT-5.4 nano?
- → 2M token context at $0.20/$0.50 per 1M — unbeatable for long context
- → Very fast inference
- → Real-time X data access
- → Cheapest OpenAI model — $0.20/1M input
- → Good at classification, routing, and extraction
- → 272K context window even at low price
Frequently Asked Questions
Which is cheaper: Grok 4.1 Fast or GPT-5.4 nano?
Grok 4.1 Fast and GPT-5.4 nano have the same input price of $0.20/1M per 1M tokens.
Which has better quality: Grok 4.1 Fast or GPT-5.4 nano?
Grok 4.1 Fast scores higher on the LMSYS Chatbot Arena with an ELO of 1305, suggesting better overall quality for most tasks.
Which has a larger context window: Grok 4.1 Fast or GPT-5.4 nano?
Grok 4.1 Fast has a larger context window at 2000K tokens.
Should I choose Grok 4.1 Fast or GPT-5.4 nano?
Choose GPT-5.4 nano if cost is the priority. Choose Grok 4.1 Fast if benchmark quality is most important. Consider your specific use case: Grok 4.1 Fast is best for long-context and low-cost, while GPT-5.4 nano excels at low-cost and fast-response.
Is Grok 4.1 Fast or GPT-5.4 nano open source?
Grok 4.1 Fast is proprietary. GPT-5.4 nano is proprietary.