LLM API Speed Test

Supporting OpenAI (compatible API), DeepSeek, Silicon Flow, Tencent Cloud and more

Help developers conduct comprehensive speed tests, analyze API performance, and compare horizontally

LM Speed does not store your API key, only used for one-time testing

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Why Choose Us

Professional API Speed Testing Tool

Help developers conduct comprehensive speed tests, analyze API performance, and compare horizontally

Real-time Speed Testing

Accurately measure API response times through comprehensive testing with multiple prompts

Custom Endpoint Support

Test API performance with custom base URLs and API keys, supporting both official and proxy endpoints

Performance Analytics

Detailed performance metrics including first token latency, tokens per second, and total processing time

Real-time Streaming Results

Monitor test progress in real-time with streaming results for each prompt evaluation

Frequently Asked Questions

Learn more about LM Speed