Unverified50% confidenceSolutionExact time
When measuring LLM time to first token (TTFT), the timer should be stopped when the first token is seen, and then the remaining stream should continue to be consumed, rather than waiting until the entire response ends.
1
Sources
50%
Confidence
Long-term
Relevance
10/19/2026
First Seen
Sources
Related Entities
Related Claims
VerifiedTime to First Token (TTFT) refers to the time interval between a user sending a request and the model outputting the first token, and is primarily constrained by the duration of the prefill stage.76% similarVerifiedTPS measurement is typically divided into two phases: Time to First Token (TTFT) and the generation rate (throughput) of subsequent tokens.72% similarUnverifiedPerformance timing in streaming output scenarios requires measuring three dimensions separately: time to first byte (TTFT), final completion time, and intermediate chunk throughput rate72% similarUnverified缓存命中时prefill阶段可跳过已缓存部分，TTFT可从数秒压缩至毫秒级71% similarUnverifiedThe total time through the first operation remains unchanged, and end-to-end latency has not changed; what has changed is which stage the latency appears in71% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/1067362API
curl https://kongchang.com/api/v1/knowledge/claims/1067362MCP
get_claim(id=1067362)