---
title: "OpenAI Model Catalog"
aliases: [openai-models, openai-api-models, gpt-models]
tags: [openai, llm, models, api, reference]
sources: [raw/All models  OpenAI API.md]
created: 2026-04-17
updated: 2026-04-17
---

## Overview

Complete reference of all models available via the OpenAI API, organized by capability family. Useful when selecting the right model for a task or comparing cost/speed tradeoffs.

---

## Flagship / Latest GPT-5 Series

| Model | Description |
|-------|-------------|
| GPT-5.3 Chat (`gpt-5.3-chat-latest`) | Instant model used in ChatGPT |
| GPT-5.2 (`gpt-5.2`) | Previous frontier model for professional work, configurable reasoning effort |
| GPT-5.2 Pro (`gpt-5.2-pro`) | Pro variant — smarter, more precise |
| GPT-5.2 Chat (`gpt-5.2-chat-latest`) | GPT-5.2 used in ChatGPT |
| GPT-5.1 (`gpt-5.1`) | Best model for coding and agentic tasks, configurable reasoning effort |
| GPT-5.1 Chat (`gpt-5.1-chat-latest`) | GPT-5.1 used in ChatGPT |
| GPT-5 Chat (`gpt-5-chat-latest`) | GPT-5 used in ChatGPT |

---

## Reasoning (o-series)

| Model | Description | Status |
|-------|-------------|--------|
| o3 | Complex tasks, succeeded by GPT-5 | Current |
| o4-mini | Fast, cost-efficient reasoning, succeeded by GPT-5 mini | Current |
| o3-mini | Small alternative to o3 | Current |
| o1 | Previous full o-series reasoning model | Legacy |
| o1-mini | Small alternative to o1 | Deprecated |
| o1-preview | Preview of first o-series model | Deprecated |

---

## GPT-4 / GPT-4o Family

| Model | Description | Status |
|-------|-------------|--------|
| GPT-4o | Fast, intelligent, flexible | Current |
| gpt-4o-mini | Fast, affordable, focused tasks | Current |
| gpt-4.1-mini | Smaller, faster GPT-4.1 | Current |
| gpt-4.1-nano | Fastest, most cost-efficient GPT-4.1 | Current |
| gpt-4.5-preview | Large model | Deprecated |
| gpt-4-turbo | Older high-intelligence model | Legacy |
| gpt-4-turbo-preview | Older fast model | Deprecated |
| GPT-4 | Older high-intelligence model | Legacy |
| chatgpt-4o-latest | GPT-4o used in ChatGPT | Deprecated |

---

## Realtime & Audio

| Model | Description |
|-------|-------------|
| gpt-realtime-1.5 | Best voice model — audio in, audio out |
| gpt-realtime | Realtime text and audio I/O |
| gpt-realtime-mini | Cost-efficient realtime |
| gpt-audio-1.5 | Best voice model with Chat Completions API |
| gpt-audio | Audio I/O via Chat Completions |
| gpt-audio-mini | Cost-efficient audio |
| gpt-4o-audio-preview | GPT-4o audio I/O |
| gpt-4o-mini-audio-preview | Smaller audio I/O |
| gpt-4o-realtime-preview | GPT-4o realtime text + audio |
| gpt-4o-mini-realtime-preview | Smaller realtime model |

## Transcription & TTS

| Model | Description |
|-------|-------------|
| gpt-4o-transcribe | Speech-to-text (GPT-4o powered) |
| gpt-4o-mini-transcribe | Speech-to-text (GPT-4o mini) |
| gpt-4o-transcribe-diarize | Transcription with speaker identification |
| gpt-4o-mini-tts | Text-to-speech (GPT-4o mini) |
| TTS-1 | Text-to-speech, optimized for speed |
| TTS-1 HD | Text-to-speech, optimized for quality |
| Whisper | General-purpose speech recognition |

---

## Search Models

| Model | Description |
|-------|-------------|
| gpt-4o-search-preview | GPT-4o with web search (Chat Completions) |
| gpt-4o-mini-search-preview | Fast, affordable web search |

---

## Specialized

| Model | Description |
|-------|-------------|
| computer-use-preview | Specialized for computer-use tool |

---

## Embedding Models

| Model | Description | Status |
|-------|-------------|--------|
| text-embedding-3-large | Most capable embedding model | Current |
| text-embedding-3-small | Smaller, fast embedding model | Current |
| text-embedding-ada-002 | Older embedding model | Legacy |

---

## Moderation Models

| Model | Description | Status |
|-------|-------------|--------|
| omni-moderation-latest | Text + image harmful content detection | Current |
| text-moderation-latest | Text-only moderation | Deprecated |
| text-moderation-stable | Text-only moderation stable | Deprecated |

---

## Legacy / Deprecated Base Models

| Model | Notes |
|-------|-------|
| gpt-3.5-turbo | Legacy chat + non-chat |
| babbage-002 | Replacement for GPT-3 ada/babbage base |
| davinci-002 | Replacement for GPT-3 curie/davinci base |

---

## Key Takeaways

- **GPT-5.x** is the current frontier series; GPT-5.1 is best for coding/agentic work
- **o-series** (o3, o4-mini) are reasoning models for complex tasks — succeeded by GPT-5
- **Realtime/Audio** has its own dedicated model family separate from Chat Completions
- **Diarization** (speaker identification) is a distinct model: `gpt-4o-transcribe-diarize`
- **Embedding**: prefer `text-embedding-3-large` for accuracy, `text-embedding-3-small` for cost
- **Moderation**: use `omni-moderation-latest` — handles both text and images
- **computer-use-preview** is the specialized model for agentic computer control
- Many older models (o1-mini, gpt-4.5-preview, chatgpt-4o-latest) are now deprecated — avoid in new projects

---

## Related

- [[wiki/tech-patterns/_index|Tech Patterns — AI stack]]
- [[wiki/agent-sdk/_index|Claude Agent SDK]]
- [[wiki/architecture/_index|Multi-agent AI architecture]]

---

## Sources

- OpenAI API Docs: All Models page (clipped 2026-04-17)
- Raw source: `raw/All models  OpenAI API.md`
