Codex API

Codex API provides AI model access through OpenAI-compatible endpoints with support for Claude, GPT, and Gemini models.

Codex API offers 10 LLM API models.

API pricing per token ranges from $0.750 to $3.00/M (input).

Speed benchmark average: 53 tok/s.

Avg Speed52.55 tok/s

Latency3.21 s

Total Tests5

Models1

Updated4/17/2026

Created At4/8/2026

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Launch speed test directly via URL parameters, automatically fill the form and start 5-round conversation speed test

baseUrl · The base URL of the OpenAI-compatible API endpoint to testapiKey · The API key for the endpointmodelId · The model ID to test

https://lmspeed.net/en?baseUrl=https%3A%2F%2Fapi.groq.com%2Fopenai%2Fv1&apiKey=gsk_xxx&modelId=llama-3.1-70b-versatile

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