OpenAI (GPT) Detection
The world's most widely used LLM API — the GPT benchmark.
Overview
OpenAI's GPT series is the most mature and widely integrated LLM API. CheckToken checks your OpenAI API Key validity, balance, model list and response speed in one place.
Protocol: OpenAI 兼容（/v1/chat/completions）
Pricing & Context (reference)
| Model | Context | Input /1M | Output /1M | Note |
|---|---|---|---|---|
| GPT-4o | 128K | $2.5 | $10 | Flagship multimodal |
| GPT-4o mini | 128K | $0.15 | $0.6 | Best value |
| o1 / o3-mini | 128K | — | — | Reasoning |
* Reference price per 1M tokens (USD). For reference only; see each platform's official pricing.
Capabilities
- · Function / tool calling
- · JSON mode
- · Multimodal (Vision)
- · Streaming
How to check
Enter your OpenAI endpoint and API Key in CheckToken, pick a GPT model and start the check to verify validity, available models and speed.
Checks: API Key validity, available models, response speed. Your API Key is never stored.
Check your OpenAI API Key for free
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