For the complete documentation index, see llms.txt. Markdown versions of documentation pages are available by appending .md to the page URL.
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Models

All models

Browse all available models and compare their capabilities.

Realtime & audio
Models for realtime, speech, and audio workflows.
gpt-realtime-2.1
GPT-Realtime-2.1
Reasoning model with tool use
gpt-realtime-2.1-mini
GPT-Realtime-2.1 mini
Reasoning model with tool use
gpt-realtime-2
GPT-Realtime-2
Reasoning model with tool use
gpt-realtime-translate
GPT-Realtime-Translate
Streaming speech-to-speech translation model
gpt-live-transcribe
GPT Live Transcribe
Low-latency speech-to-text model for realtime transcription
gpt-realtime-whisper
GPT-Realtime-Whisper
Streaming speech-to-text model for realtime transcription
gpt-realtime-1.5
GPT-Realtime-1.5
The best voice model for audio in, audio out
gpt-realtime
GPT-Realtime
Deprecated
Model capable of realtime text and audio inputs and outputs
gpt-audio-1.5
gpt-audio-1.5
The best voice model for audio in, audio out with Chat Completions.
gpt-audio
gpt-audio
Deprecated
For audio inputs and outputs with Chat Completions API
gpt-transcribe
GPT Transcribe
High-accuracy speech-to-text model for file and Realtime input transcription
gpt-4o-transcribe
GPT-4o Transcribe
Speech-to-text model powered by GPT-4o
gpt-4o-mini-transcribe
GPT-4o mini Transcribe
Speech-to-text model powered by GPT-4o mini
gpt-4o-transcribe-diarize
GPT-4o Transcribe Diarize
Transcription model that identifies who's speaking when
tts-1
TTS-1
Text-to-speech model optimized for speed
tts-1-hd
TTS-1 HD
Text-to-speech model optimized for quality
whisper-1
Whisper
General-purpose speech recognition model
gpt-realtime-mini
GPT-Realtime mini
Deprecated
A cost-efficient version of GPT-Realtime
gpt-audio-mini
gpt-audio-mini
Deprecated
A cost-efficient version of GPT Audio
gpt-4o-audio-preview
GPT-4o Audio
Deprecated
GPT-4o models capable of audio inputs and outputs
gpt-4o-mini-audio-preview
GPT-4o mini Audio
Deprecated
Smaller model capable of audio inputs and outputs
gpt-4o-realtime-preview
GPT-4o Realtime
Deprecated
Model capable of realtime text and audio inputs and outputs
gpt-4o-mini-realtime-preview
GPT-4o mini Realtime
Deprecated
Smaller realtime model for text and audio inputs and outputs
gpt-4o-mini-tts
GPT-4o mini TTS
Deprecated
Text-to-speech model powered by GPT-4o mini
More models
Diverse models for a variety of tasks.
gpt-5.3-codex
GPT-5.3-Codex
The most capable agentic coding model to date.
gpt-5.2
GPT-5.2
Previous frontier model for professional work with configurable reasoning effort
gpt-5.2-pro
GPT-5.2 Pro
Previous pro model for professional work that produces smarter and more precise responses.
gpt-5.1
GPT-5.1
The best model for coding and agentic tasks with configurable reasoning effort
gpt-5
GPT-5
Previous intelligent reasoning model for coding and agentic tasks with configurable reasoning effort
gpt-5-mini
GPT-5 mini
Near-frontier intelligence for cost sensitive, low latency, high volume workloads
gpt-5-nano
GPT-5 nano
Fastest, most cost-efficient version of GPT-5
gpt-5-pro
GPT-5 Pro
Version of GPT-5 that produces smarter and more precise responses
o3-pro
o3-pro
Version of o3 with more compute for better responses
o3
o3
Reasoning model for complex tasks, succeeded by GPT-5
gpt-4.1
GPT-4.1
Smartest non-reasoning model
gpt-4.1-mini
GPT-4.1 mini
Smaller, faster version of GPT-4.1
omni-moderation-latest
omni-moderation
Identify potentially harmful content in text and images
gpt-4o-mini
GPT-4o mini
Fast, affordable small model for focused tasks
gpt-5.3-chat-latest
GPT-5.3 Chat
Deprecated
GPT-5.3 Instant model used in ChatGPT
gpt-5.2-chat-latest
GPT-5.2 Chat
Deprecated
GPT-5.2 model used in ChatGPT
gpt-5.2-codex
GPT-5.2-Codex
Deprecated
Our most intelligent coding model optimized for long-horizon, agentic coding tasks.
sora-2
Sora 2
Deprecated
Flagship video generation with synced audio
sora-2-pro
Sora 2 Pro
Deprecated
Most advanced synced-audio video generation
o3-deep-research
o3-deep-research
Deprecated
Our most powerful deep research model
o4-mini-deep-research
o4-mini-deep-research
Deprecated
Faster, more affordable deep research model
gpt-4.1-nano
GPT-4.1 nano
Deprecated
Fastest, most cost-efficient version of GPT-4.1
o4-mini
o4-mini
Deprecated
Fast, cost-efficient reasoning model, succeeded by GPT-5 mini
o1-pro
o1-pro
Deprecated
Version of o1 with more compute for better responses
computer-use-preview
computer-use-preview
Deprecated
Specialized model for computer use tool
gpt-4o-mini-search-preview
GPT-4o mini Search Preview
Deprecated
Fast, affordable small model for web search
gpt-4o-search-preview
GPT-4o Search Preview
Deprecated
GPT model for web search in Chat Completions
gpt-4.5-preview
GPT-4.5 Preview
Deprecated
Deprecated large model.
o3-mini
o3-mini
Deprecated
A small model alternative to o3
o1
o1
Deprecated
Previous full o-series reasoning model
o1-mini
o1-mini
Deprecated
A small model alternative to o1
o1-preview
o1 Preview
Deprecated
Preview of our first o-series reasoning model
gpt-4o
GPT-4o
Deprecated
Fast, intelligent, flexible GPT model
gpt-4-turbo
GPT-4 Turbo
Deprecated
An older high-intelligence GPT model
babbage-002
babbage-002
Deprecated
Replacement for the GPT-3 ada and babbage base models
chatgpt-4o-latest
ChatGPT-4o
Deprecated
GPT-4o model used in ChatGPT
gpt-5.1-codex
GPT-5.1-Codex
Deprecated
A version of GPT-5.1 optimized for agentic coding in Codex.
gpt-5.1-codex-max
GPT-5.1-Codex-Max
Deprecated
A version of GPT-5.1-codex optimized for long running tasks.
gpt-5.1-codex-mini
GPT-5.1-Codex mini
Deprecated
Smaller, more cost-effective, less-capable version of GPT-5.1-Codex
gpt-5-codex
GPT-5-Codex
Deprecated
A version of GPT-5 optimized for agentic coding in Codex
codex-mini-latest
codex-mini-latest
Deprecated
Fast reasoning model optimized for the Codex CLI
davinci-002
davinci-002
Deprecated
Replacement for the GPT-3 curie and davinci base models
gpt-3.5-turbo
GPT-3.5 Turbo
Deprecated
Legacy GPT model for cheaper chat and non-chat tasks
gpt-4
GPT-4
Deprecated
An older high-intelligence GPT model
gpt-4-turbo-preview
GPT-4 Turbo Preview
Deprecated
An older fast GPT model
gpt-5.1-chat-latest
GPT-5.1 Chat
Deprecated
GPT-5.1 model used in ChatGPT
gpt-5-chat-latest
GPT-5 Chat
Deprecated
GPT-5 model used in ChatGPT
text-moderation-latest
text-moderation
Deprecated
Previous generation text-only moderation model
text-moderation-stable
text-moderation-stable
Deprecated
Previous generation text-only moderation model
ChatGPT models
Models used in ChatGPT, not recommended for API use.

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