> ## Documentation Index
> Fetch the complete documentation index at: https://lava.so/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# OpenAI
> The industry-standard LLM provider offering the GPT-5.x family (including GPT-5.5 Instant and GPT-5.5 Pro), the o-series reasoning models, prior GPT-4.x snapshots, embeddings, DALL-E image generation, and Whisper audio transcription.
OpenAI offers 67 models through Lava's AI Gateway, supporting Chat Completions, Embeddings, Text to Speech, Transcription, Image Generation. Authentication uses `Authorization: Bearer`. See the [OpenAI API docs](https://platform.openai.com/docs/api-reference) for provider-specific parameters.
Supports both **managed** (Lava's API keys) and **unmanaged** (bring your own credentials) mode.
## Quick Start
```typescript theme={null}
const response = await fetch('https://api.lava.so/v1/forward?u=https%3A%2F%2Fapi.openai.com%2Fv1%2Fchat%2Fcompletions', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
Authorization: `Bearer ${forwardToken}`,
},
body: JSON.stringify({
model: 'gpt-5.5',
messages: [{ role: "user", content: "Hello!" }],
}),
});
```
## Chat Completions
**Target URL:** `https://api.openai.com/v1/chat/completions`
| | |
| ---------------- | ---------------------------------------- |
| **Content Type** | `application/json` |
| **Streaming** | Yes (set `stream: true` in request body) |
| Model | Input / 1M tokens | Output / 1M tokens |
| ----------------------- | ----------------- | ------------------ |
| o1-pro | \$150.00 | \$600.00 |
| o1-pro-2025-03-19 | \$150.00 | \$600.00 |
| gpt-5.5-pro | \$30.00 | \$180.00 |
| gpt-5.5-pro-2026-04-23 | \$30.00 | \$180.00 |
| gpt-5.4-pro | \$30.00 | \$180.00 |
| gpt-4 | \$30.00 | \$60.00 |
| gpt-4-0613 | \$30.00 | \$60.00 |
| gpt-5.2-pro | \$21.00 | \$168.00 |
| o3-pro | \$20.00 | \$80.00 |
| o3-pro-2025-06-10 | \$20.00 | \$80.00 |
| gpt-5-pro | \$15.00 | \$120.00 |
| o1 | \$15.00 | \$60.00 |
| o1-2024-12-17 | \$15.00 | \$60.00 |
| gpt-4-turbo | \$10.00 | \$30.00 |
| gpt-4-turbo-2024-04-09 | \$10.00 | \$30.00 |
| gpt-5.5 | \$5.00 | \$30.00 |
| gpt-5.5-2026-04-23 | \$5.00 | \$30.00 |
| gpt-5.5-chat-latest | \$5.00 | \$30.00 |
| gpt-4o-2024-05-13 | \$5.00 | \$15.00 |
| gpt-5.4 | \$2.50 | \$15.00 |
| gpt-5.4-codex | \$2.50 | \$15.00 |
| gpt-4o | \$2.50 | \$10.00 |
| gpt-4o-2024-11-20 | \$2.50 | \$10.00 |
| gpt-4o-2024-08-06 | \$2.50 | \$10.00 |
| gpt-4.1 | \$2.00 | \$8.00 |
| gpt-4.1-2025-04-14 | \$2.00 | \$8.00 |
| o3 | \$2.00 | \$8.00 |
| o3-2025-04-16 | \$2.00 | \$8.00 |
| davinci-002 | \$2.00 | \$2.00 |
| gpt-5.3-chat-latest | \$1.75 | \$14.00 |
| gpt-5.3-codex | \$1.75 | \$14.00 |
| gpt-5.2 | \$1.75 | \$14.00 |
| gpt-5.2-chat-latest | \$1.75 | \$14.00 |
| gpt-3.5-turbo-instruct | \$1.50 | \$2.00 |
| gpt-5.1 | \$1.25 | \$10.00 |
| gpt-5 | \$1.25 | \$10.00 |
| gpt-5-2025-08-07 | \$1.25 | \$10.00 |
| gpt-5-search-api | \$1.25 | \$10.00 |
| o4-mini | \$1.10 | \$4.40 |
| o4-mini-2025-04-16 | \$1.10 | \$4.40 |
| o3-mini | \$1.10 | \$4.40 |
| o3-mini-2025-01-31 | \$1.10 | \$4.40 |
| gpt-3.5-turbo-1106 | \$1.00 | \$2.00 |
| gpt-5.4-mini | \$0.75 | \$4.50 |
| gpt-3.5-turbo | \$0.50 | \$1.50 |
| gpt-3.5-turbo-0125 | \$0.50 | \$1.50 |
| gpt-4.1-mini | \$0.40 | \$1.60 |
| gpt-4.1-mini-2025-04-14 | \$0.40 | \$1.60 |
| babbage-002 | \$0.40 | \$0.40 |
| gpt-5-mini | \$0.25 | \$2.00 |
| gpt-5-mini-2025-08-07 | \$0.25 | \$2.00 |
| gpt-5.4-nano | \$0.20 | \$1.25 |
| gpt-4o-mini | \$0.15 | \$0.60 |
| gpt-4o-mini-2024-07-18 | \$0.15 | \$0.60 |
| gpt-4.1-nano | \$0.10 | \$0.40 |
| gpt-4.1-nano-2025-04-14 | \$0.10 | \$0.40 |
| gpt-5-nano | \$0.05 | \$0.40 |
| gpt-5-nano-2025-08-07 | \$0.05 | \$0.40 |
## Embeddings
**Target URL:** `https://api.openai.com/v1/embeddings`
| | |
| ---------------- | ------------------ |
| **Content Type** | `application/json` |
| **Streaming** | No |
| Model | Input / 1M tokens | Output / 1M tokens |
| ---------------------- | ----------------- | ------------------ |
| text-embedding-3-large | \$0.13 | Free |
| text-embedding-ada-002 | \$0.10 | Free |
| text-embedding-3-small | \$0.02 | Free |
## Text to Speech
**Target URL:** `https://api.openai.com/v1/audio/speech`
| | |
| ---------------- | ------------------ |
| **Content Type** | `application/json` |
| **Streaming** | No |
| Model | Input / 1M chars | Output / 1M chars |
| -------- | ---------------- | ----------------- |
| tts-1-hd | \$30.00 | Free |
| tts-1 | \$15.00 | Free |
## Transcription
**Target URL:** `https://api.openai.com/v1/audio/transcriptions`
| | |
| ---------------- | --------------------- |
| **Content Type** | `multipart/form-data` |
| **Streaming** | No |
| Model | Input / minute | Output / minute |
| --------- | -------------- | --------------- |
| whisper-1 | \$0.006 | Free |
## Image Generation
**Target URL:** `https://api.openai.com/v1/images/generations`
| | |
| ---------------- | ------------------ |
| **Content Type** | `application/json` |
| **Streaming** | No |
| Model | Input / 1M tokens | Output / 1M tokens |
| ---------------------- | ----------------- | ------------------ |
| gpt-image-2 | \$5.00 | Free |
| gpt-image-2-2026-04-21 | \$5.00 | Free |
| gpt-image-1 | \$5.00 | Free |
## Next Steps
Browse all supported AI providers
Learn how to construct proxy URLs and authenticate requests