# Models

> For the complete documentation index, see [llms.txt](/llms.txt). Markdown versions of documentation pages are available by appending `.md` to the page URL.

> Explore models available on the OpenAI API.

If you're not sure where to start, use [GPT-5.6 Sol](/api/docs/models/gpt-5.6-sol), our flagship model for complex reasoning and coding. Choose [GPT-5.6 Terra](/api/docs/models/gpt-5.6-terra) to balance intelligence and cost, or [GPT-5.6 Luna](/api/docs/models/gpt-5.6-luna) for cost-sensitive, high-volume workloads.

All latest OpenAI models support text and image input, text output, multilingual capabilities, and vision. Models are available via the [Responses API](/api/reference/resources/responses/methods/create) and our [Client SDKs](/api/docs/libraries).

## Recommended models

- [GPT-5.6 Sol](/api/docs/models/gpt-5.6-sol.md): Start here for complex reasoning and coding.
- [GPT-5.6 Terra](/api/docs/models/gpt-5.6-terra.md): Balance intelligence and cost.
- [GPT-5.6 Luna](/api/docs/models/gpt-5.6-luna.md): Optimize cost-sensitive, high-volume workloads.

## Browse our full catalog of models

Diverse models for a variety of tasks

See [how OpenAI uses your data](/api/docs/guides/your-data.md) and review [deprecated models](/api/docs/deprecations.md).

- [babbage-002](/api/docs/models/babbage-002.md): Replacement for the GPT-3 ada and babbage base models
- [Chat Latest](/api/docs/models/chat-latest.md): Latest Instant model used in ChatGPT
- [ChatGPT-4o](/api/docs/models/chatgpt-4o-latest.md): GPT-4o model used in ChatGPT
- [chatgpt-image-latest](/api/docs/models/chatgpt-image-latest.md): Previous image model used in ChatGPT.
- [codex-mini-latest](/api/docs/models/codex-mini-latest.md): Fast reasoning model optimized for the Codex CLI
- [computer-use-preview](/api/docs/models/computer-use-preview.md): Specialized model for computer use tool
- [davinci-002](/api/docs/models/davinci-002.md): Replacement for the GPT-3 curie and davinci base models
- [Daybreak Blue](/api/docs/models/daybreak-blue-latest.md): An alias for frontier general-purpose models with safeguards for defensive cybersecurity work.
- [Daybreak Red](/api/docs/models/daybreak-red-latest.md): An alias for advanced cybersecurity models for authorized vulnerability research and security testing.
- [GPT-3.5 Turbo](/api/docs/models/gpt-3.5-turbo.md): Legacy GPT model for cheaper chat and non-chat tasks
- [GPT-4](/api/docs/models/gpt-4.md): An older high-intelligence GPT model
- [GPT-4 Turbo](/api/docs/models/gpt-4-turbo.md): An older high-intelligence GPT model
- [GPT-4 Turbo Preview](/api/docs/models/gpt-4-turbo-preview.md): An older fast GPT model
- [GPT-4.1](/api/docs/models/gpt-4.1.md): Smartest non-reasoning model
- [GPT-4.1 mini](/api/docs/models/gpt-4.1-mini.md): Smaller, faster version of GPT-4.1
- [GPT-4.1 nano](/api/docs/models/gpt-4.1-nano.md): Fastest, most cost-efficient version of GPT-4.1
- [GPT-4.5 Preview](/api/docs/models/gpt-4.5-preview.md): Deprecated large model.
- [GPT-4o](/api/docs/models/gpt-4o.md): Fast, intelligent, flexible GPT model
- [GPT-4o Audio](/api/docs/models/gpt-4o-audio-preview.md): GPT-4o models capable of audio inputs and outputs
- [GPT-4o mini](/api/docs/models/gpt-4o-mini.md): Fast, affordable small model for focused tasks
- [GPT-4o mini Audio](/api/docs/models/gpt-4o-mini-audio-preview.md): Smaller model capable of audio inputs and outputs
- [GPT-4o mini Realtime](/api/docs/models/gpt-4o-mini-realtime-preview.md): Smaller realtime model for text and audio inputs and outputs
- [GPT-4o mini Search Preview](/api/docs/models/gpt-4o-mini-search-preview.md): Fast, affordable small model for web search
- [GPT-4o mini Transcribe](/api/docs/models/gpt-4o-mini-transcribe.md): Speech-to-text model powered by GPT-4o mini
- [GPT-4o mini TTS](/api/docs/models/gpt-4o-mini-tts.md): Text-to-speech model powered by GPT-4o mini
- [GPT-4o Realtime](/api/docs/models/gpt-4o-realtime-preview.md): Model capable of realtime text and audio inputs and outputs
- [GPT-4o Search Preview](/api/docs/models/gpt-4o-search-preview.md): GPT model for web search in Chat Completions
- [GPT-4o Transcribe](/api/docs/models/gpt-4o-transcribe.md): Speech-to-text model powered by GPT-4o
- [GPT-4o Transcribe Diarize](/api/docs/models/gpt-4o-transcribe-diarize.md): Transcription model that identifies who's speaking when
- [GPT-5](/api/docs/models/gpt-5.md): Previous intelligent reasoning model for coding and agentic tasks with configurable reasoning effort
- [GPT-5 Chat](/api/docs/models/gpt-5-chat-latest.md): GPT-5 model used in ChatGPT
- [GPT-5 mini](/api/docs/models/gpt-5-mini.md): Near-frontier intelligence for cost sensitive, low latency, high volume workloads
- [GPT-5 nano](/api/docs/models/gpt-5-nano.md): Fastest, most cost-efficient version of GPT-5
- [GPT-5 Pro](/api/docs/models/gpt-5-pro.md): Version of GPT-5 that produces smarter and more precise responses
- [GPT-5-Codex](/api/docs/models/gpt-5-codex.md): A version of GPT-5 optimized for agentic coding in Codex
- [GPT-5.1](/api/docs/models/gpt-5.1.md): The best model for coding and agentic tasks with configurable reasoning effort
- [GPT-5.1 Chat](/api/docs/models/gpt-5.1-chat-latest.md): GPT-5.1 model used in ChatGPT
- [GPT-5.1-Codex](/api/docs/models/gpt-5.1-codex.md): A version of GPT-5.1 optimized for agentic coding in Codex.
- [GPT-5.1-Codex mini](/api/docs/models/gpt-5.1-codex-mini.md): Smaller, more cost-effective, less-capable version of GPT-5.1-Codex
- [GPT-5.1-Codex-Max](/api/docs/models/gpt-5.1-codex-max.md): A version of GPT-5.1-codex optimized for long running tasks.
- [GPT-5.2](/api/docs/models/gpt-5.2.md): Previous frontier model for professional work with configurable reasoning effort
- [GPT-5.2 Chat](/api/docs/models/gpt-5.2-chat-latest.md): GPT-5.2 model used in ChatGPT
- [GPT-5.2 Pro](/api/docs/models/gpt-5.2-pro.md): Previous pro model for professional work that produces smarter and more precise responses.
- [GPT-5.2-Codex](/api/docs/models/gpt-5.2-codex.md): Our most intelligent coding model optimized for long-horizon, agentic coding tasks.
- [GPT-5.3 Chat](/api/docs/models/gpt-5.3-chat-latest.md): GPT-5.3 Instant model used in ChatGPT
- [GPT-5.3-Codex](/api/docs/models/gpt-5.3-codex.md): The most capable agentic coding model to date.
- [GPT-5.4](/api/docs/models/gpt-5.4.md): A more affordable model for coding and professional work.
- [GPT-5.4 mini](/api/docs/models/gpt-5.4-mini.md): Our strongest mini model yet for coding, computer use, and subagents
- [GPT-5.4 nano](/api/docs/models/gpt-5.4-nano.md): Our cheapest GPT-5.4-class model for simple high-volume tasks
- [GPT-5.4 Pro](/api/docs/models/gpt-5.4-pro.md): Version of GPT-5.4 that produces smarter and more precise responses.
- [GPT-5.5](/api/docs/models/gpt-5.5.md): A new class of intelligence for coding and professional work.
- [GPT-5.5 Pro](/api/docs/models/gpt-5.5-pro.md): Version of GPT-5.5 that produces smarter and more precise responses.
- [GPT-5.6 Cyber](/api/docs/models/gpt-5.6-cyber.md): Our most advanced cybersecurity model for authorized vulnerability research and security testing.
- [GPT-5.6 Luna](/api/docs/models/gpt-5.6-luna.md): GPT-5.6 model optimized for cost-sensitive workloads
- [GPT-5.6 Sol](/api/docs/models/gpt-5.6-sol.md): Frontier model for complex professional work
- [GPT-5.6 Terra](/api/docs/models/gpt-5.6-terra.md): GPT-5.6 model that balances intelligence and cost
- [GPT-Audio](/api/docs/models/gpt-audio.md): For audio inputs and outputs with Chat Completions API
- [GPT-Audio mini](/api/docs/models/gpt-audio-mini.md): A cost-efficient version of GPT Audio
- [GPT-Audio-1.5](/api/docs/models/gpt-audio-1.5.md): The best voice model for audio in, audio out with Chat Completions.
- [GPT-Image-1](/api/docs/models/gpt-image-1.md): Our previous image generation model
- [GPT-Image-1 mini](/api/docs/models/gpt-image-1-mini.md): A cost-efficient version of GPT Image 1
- [GPT-Image-1.5](/api/docs/models/gpt-image-1.5.md): Our previous image generation model
- [GPT-Image-2](/api/docs/models/gpt-image-2.md): State-of-the-art image generation model
- [GPT-Live-Transcribe](/api/docs/models/gpt-live-transcribe.md): Low-latency speech-to-text model for realtime transcription
- [gpt-oss-120b](/api/docs/models/gpt-oss-120b.md): Most powerful open-weight model, fits into an H100 GPU
- [gpt-oss-20b](/api/docs/models/gpt-oss-20b.md): Medium-sized open-weight model for low latency
- [GPT-Realtime](/api/docs/models/gpt-realtime.md): Model capable of realtime text and audio inputs and outputs
- [GPT-Realtime mini](/api/docs/models/gpt-realtime-mini.md): A cost-efficient version of GPT-Realtime
- [GPT-Realtime-1.5](/api/docs/models/gpt-realtime-1.5.md): The best voice model for audio in, audio out
- [GPT-Realtime-2](/api/docs/models/gpt-realtime-2.md): Reasoning model with tool use
- [GPT-Realtime-2.1](/api/docs/models/gpt-realtime-2.1.md): Reasoning model with tool use
- [GPT-Realtime-2.1 mini](/api/docs/models/gpt-realtime-2.1-mini.md): Reasoning model with tool use
- [GPT-Realtime-Translate](/api/docs/models/gpt-realtime-translate.md): Streaming speech-to-speech translation model
- [GPT-Realtime-Whisper](/api/docs/models/gpt-realtime-whisper.md): Streaming speech-to-text model for realtime transcription
- [GPT-Transcribe](/api/docs/models/gpt-transcribe.md): High-accuracy speech-to-text model for file and Realtime input transcription
- [o1](/api/docs/models/o1.md): Previous full o-series reasoning model
- [o1 Preview](/api/docs/models/o1-preview.md): Preview of our first o-series reasoning model
- [o1-mini](/api/docs/models/o1-mini.md): A small model alternative to o1
- [o1-pro](/api/docs/models/o1-pro.md): Version of o1 with more compute for better responses
- [o3](/api/docs/models/o3.md): Reasoning model for complex tasks, succeeded by GPT-5
- [o3-deep-research](/api/docs/models/o3-deep-research.md): Our most powerful deep research model
- [o3-mini](/api/docs/models/o3-mini.md): A small model alternative to o3
- [o3-pro](/api/docs/models/o3-pro.md): Version of o3 with more compute for better responses
- [o4-mini](/api/docs/models/o4-mini.md): Fast, cost-efficient reasoning model, succeeded by GPT-5 mini
- [o4-mini-deep-research](/api/docs/models/o4-mini-deep-research.md): Faster, more affordable deep research model
- [omni-moderation](/api/docs/models/omni-moderation-latest.md): Identify potentially harmful content in text and images
- [Sora 2](/api/docs/models/sora-2.md): Flagship video generation with synced audio
- [Sora 2 Pro](/api/docs/models/sora-2-pro.md): Most advanced synced-audio video generation
- [text-embedding-3-large](/api/docs/models/text-embedding-3-large.md): Most capable embedding model
- [text-embedding-3-small](/api/docs/models/text-embedding-3-small.md): Small embedding model
- [text-embedding-ada-002](/api/docs/models/text-embedding-ada-002.md): Older embedding model
- [text-moderation](/api/docs/models/text-moderation-latest.md): Previous generation text-only moderation model
- [text-moderation-stable](/api/docs/models/text-moderation-stable.md): Previous generation text-only moderation model
- [TTS-1](/api/docs/models/tts-1.md): Text-to-speech model optimized for speed
- [TTS-1 HD](/api/docs/models/tts-1-hd.md): Text-to-speech model optimized for quality
- [Whisper](/api/docs/models/whisper-1.md): General-purpose speech recognition model