Grok 4 Fast (Reasoning): Intelligence, Performance & Price Analysis
Analysis of xAI's Grok 4 Fast (Reasoning) and comparison to other AI models across key metrics including quality, price, performance (tokens per second & time to first token), context window & more. Click on any model to compare API providers for that model. For more details including relating to our methodology, see our FAQs.
Comparison Summary
Intelligence:
Grok 4 Fast is of higher intelligence compared to average, with Artificial Analysis Intelligence Index of 60.
Price:Grok 4 Fast is cheaper compared to average with a price of $0.28 per 1M Tokens (blended 3:1).
Grok 4 Fast Input token price: $0.20, Output token price: $0.50 per 1M Tokens.
Speed:Grok 4 Fast Input token price: $0.20, Output token price: $0.50 per 1M Tokens.
Grok 4 Fast is faster compared to average, with a output speed of 296.8 tokens per second.
Latency:Grok 4 Fast has a lower latency compared to average, taking 2.57s to receive the first token (TTFT).
Context Window:Grok 4 Fast has a larger context windows than average, with a context window of 2.0M tokens.
Highlights
Intelligence
Artificial Analysis Intelligence Index; Higher is better
Speed
Output Tokens per Second; Higher is better
Price
USD per 1M Tokens; Lower is better
Parallel Queries:
Prompt Length:
Grok 4 Fast (Reasoning) Model Details
Comparisons to Grok 4 Fast
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