Model scorecard
xAI grok-4-fast
Composite 73.2/100 across quality, throughput, latency, price efficiency and usable context — measured through the gateway, not vendor-reported.
A73.2/100xai/grok-4-fasttext · 128k context
Capability
eval compositeQuality (blended eval)78
Category: cheap
Usable context6
128k advertised window
Serving
gateway measuredThroughput86
300 output tokens/s median
Time to first token88
75ms p50
Economics
at provider costPrice efficiency82
$0.40 per 1M output tokens
Quality per dollar100
llmcloud adds $0 to these token prices.
Suggested usage
Not a default pick today. It is a reasonable explicit choice when you need this vendor specifically, or as a failover target inside auto:cheap.
→ Full workload matrix