grok-4-fast vs glm-4-long
Input price
$0.20
$0.00
Output price
$0.50
$0.00
Context window
2000K
1049K
Throughput
132 tok/s
147 tok/s
Availability
99.3%
97.3%
Cost / task
$0.001
$0.000
Efficiency score
96
96
Estimated monthly cost by workload
Metric
GROK-4-FAST
GLM-4-LONG
Chat assistant
$120.00
$0.00
RAG / long context
$285.00
$0.00
Agent / tool use
$324.00
$0.00
Efficiency score: glm-4-long
Across price, speed and reliability, glm-4-long 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-fast or glm-4-long cheaper?+
glm-4-long has the lower input price — $0.00 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-fast or glm-4-long?+
Across price, speed and reliability, glm-4-long offers the stronger overall balance for most workloads — but the right pick depends on your exact mix of input, output and latency needs.