Model Speed Lab

TTFT comparisons in one view

Swap models in and out to see time-to-first-token distributions side by side. Focus on responsiveness before you commit to a provider.

Model picker
Select up to 6 models
OpenAIOpenAI
GoogleGoogle Gemini
AnthropicAnthropic
GrokxAI Grok
MistralMistral
PerplexityPerplexity

TTFT Comparison

Compare time-to-first-token across multiple models

Pick
OpenAIGPT-5-Chat
OpenAI
861ms
Fastest: 265ms
Slowest: 10 mins 1s
Pick
OpenAIGPT-4.1
OpenAI
2.31s
Fastest: 269ms
Slowest: 1 hrs
Pick
OpenAIGPT-5
OpenAI
2.31s
Fastest: 377ms
Slowest: 1 hrs
Pick
OpenAIGPT-4o
OpenAI
1.22s
Fastest: 303ms
Slowest: 1 hrs