o3
Default
Reasoning model for complex tasks, succeeded by GPT-5. Well-rounded and powerful model across domains that sets a new standard for math, science, coding, and visual reasoning tasks
Reasoning model for complex tasks, succeeded by GPT-5. Well-rounded and powerful model across domains that sets a new standard for math, science, coding, and visual reasoning tasks
Intelligence
Basic
Speed
Medium
Price
$2.00 • $2.00
Input • Output
Input
Text, image, audio
Output
Text, image, audio
o3 is reasoning model for complex tasks, succeeded by gpt-5. well-rounded and powerful model across domains that sets a new standard for math, science, coding, and visual reasoning tasks. Learn more in our o3 usage guide.
128,000 context window
100,000 max output tokens
Jun 01, 2024 knowledge cutoff
Reasoning token support
Pricing
Pricing is based on the number of tokens used. For tool-specific models, like search and computer use, there's a fee per tool call. See details in the pricing page.
Text tokens
Per 1M tokens
∙
Batch API price
Input
$2.00
Cached input
$0.50
Output
$2.00
Quick comparison
Input
Cached input
Output
o3
$2.00
Modalities
Text
Input and output
Image
Input only
Audio
Not supported
Endpoints
Chat Completions
v1/chat/completions
Responses
v1/responses
Batch
v1/batch
Realtime
v1/realtime
Assistants
v1/assistants
Fine-tuning
v1/fine-tuning
Embeddings
v1/embeddings
Image Generation
v1/images/generations
Image Edit
v1/images/edits
Speech Generation
v1/audio/speech
Transcription
v1/audio/transcriptions
Translation
v1/translations
Moderation
v1/moderations
Completions (legacy)
v1/completions
Features
Streaming
Supported
Function calling
Supported
Structured outputs
Supported
Fine-tuning
Supported
Distillation
Not supported
Fast response
Not supported
Cost efficient
Not supported
Tools
Tools supported by this model when using the Responses API.
Web search
Supported
Code interpreter
Supported
File search
Supported
Image generation
Supported
MCP
Supported
Snapshots
Snapshots let you lock in a specific version of the model so that performance and behavior remain consistent. Below is a list of all available snapshots and aliases for o3.
o3
Rate limits
Rate limits ensure fair and reliable access to the API by placing specific caps on requests or tokens used within a given time period. Your usage tier determines how high these limits are set and automatically increases as you send more requests and spend more on the API.
| Tier | RPM | TPM | Batch queue limit |
|---|---|---|---|
| Free | Not supported | ||
| Tier 1 | 500 | 30,000 | 90,000 |
| Tier 2 | 5,000 | 450,000 | 1,350,000 |
| Tier 3 | 5,000 | 800,000 | 50,000,000 |
| Tier 4 | 10,000 | 2,000,000 | 200,000,000 |
| Tier 5 | 10,000 | 30,000,000 | 5,000,000,000 |