xAI
Grok 4 1 Fast Reasoning
Grok 4 1 Fast Reasoning AI model by xAI.
Intelligence
72.0 #83
Top 11% tier
Output Speed
50 t/s
ITL 20.0 ms/tok
Blended price (3:1)
$6 /1M
In $3/M · Out $15/M
Context
128K
≈ 320 A4 pages · max out 16,384
Quality Domain Radar
6-Axis Frontier Evaluation vs Category Average & Flagship
Grok 4 1 Fast Reasoning
Claude Mythos Preview (#1)
Average (68)
Radar axes are approximated from category scores where direct benchmark measurements are missing — see Methodology.
API deployment
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Throughput, TTFT and cache pricing across Groq, Cerebras, Together, DeepInfra, Fireworks, Bedrock and Azure.
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Category Scores
Benchmark Results
Model Details
Release date
Jan 1, 2024
Parameters
Unknown
License
Unknown
Context Window
128,000 tokens
Input Price
$3/M
Output Price
$15/M
Output Speed
50 t/s
Time to First Token
—
Estimated monthly bill
Estimated monthly spend
$0.00
Calculating savings vs GPT-4o...
Cite & embed
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@misc{llmpodium2026grok41fastreasoning,
title = {Benchmark Analysis and Intelligence Evaluation of Grok 4 1 Fast Reasoning},
author = {LLMPodium Research},
year = {2026},
url = {https://llmpodium.com/models/grok-4-1-fast-reasoning}
}Embed Score Badge
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