grok-4.1-fast vs grok-4-1-fast-reasoning
Input price
$0.20
$0.20
Output price
$0.50
$0.50
Context window
2000K
2000K
Throughput
150 tok/s
131 tok/s
Availability
97.5%
97.3%
Cost / task
$0.001
$0.001
Efficiency score
96
96
Estimated monthly cost by workload
Metric
GROK-4.1-FAST
GROK-4-1-FAST-
Chat assistant
$120.00
$120.00
RAG / long context
$285.00
$285.00
Agent / tool use
$324.00
$324.00
Efficiency score: grok-4.1-fast
Across price, speed and reliability, grok-4.1-fast offers the stronger overall balance for most workloads — but the right pick depends on your exact mix of input, output and latency needs.
Figures are illustrative demo data, not financial advice.
Frequently asked questions
Is grok-4.1-fast or grok-4-1-fast-reasoning cheaper?+
grok-4.1-fast has the lower input price — $0.20 vs $0.20 per 1M tokens — so for most blended workloads it is the more cost-effective of the two. Figures are illustrative demo data.
Which should I choose, grok-4.1-fast or grok-4-1-fast-reasoning?+
Across price, speed and reliability, grok-4.1-fast offers the stronger overall balance for most workloads — but the right pick depends on your exact mix of input, output and latency needs.