---
title: OpenAI
description: Use OpenAI models (GPT-4o, o1, embeddings) with Nexus.
---

The OpenAI provider connects to the OpenAI API for chat completions, streaming, embeddings, vision, and tool calling.

## Installation

```go
import "github.com/xraph/nexus/providers/openai"
```

## Quick Start

```go
provider := openai.New(os.Getenv("OPENAI_API_KEY"))

gw := nexus.New(
    nexus.WithProvider(provider),
)
```

## Options

| Option | Description |
|--------|-------------|
| `openai.WithBaseURL(url)` | Override the API base URL (default: `https://api.openai.com/v1`) |
| `openai.WithOrgID(id)` | Set the `OpenAI-Organization` header |

## Capabilities

| Capability | Supported |
|-----------|-----------|
| Chat | Yes |
| Streaming | Yes |
| Embeddings | Yes |
| Vision | Yes |
| Tools | Yes |
| Thinking | Yes (o-series models) |

## Models

| Model | Context | Max Output | Input Price | Output Price |
|-------|---------|-----------|-------------|-------------|
| `gpt-4o` | 128K | 16,384 | $2.50/M | $10.00/M |
| `gpt-4o-mini` | 128K | 16,384 | $0.15/M | $0.60/M |
| `gpt-4-turbo` | 128K | 4,096 | $10.00/M | $30.00/M |
| `o1` | 200K | 100K | $15.00/M | $60.00/M |
| `o1-mini` | 128K | 65,536 | $3.00/M | $12.00/M |
| `text-embedding-3-small` | 8,191 | — | $0.02/M | — |
| `text-embedding-3-large` | 8,191 | — | $0.13/M | — |