o3
OpenAI · Deliberate o-series reasoner for hard math, coding, and multi-step analysis
Key facts
- Provider
- OpenAI
- Context window
- 200K tokens
- Max output
- 100K tokens
- Input price
- $2 / M tok
- Output price
- $8 / M tok
- Knowledge cutoff
- May 2024
- Released
- Apr 16, 2025
- License
- —
Capabilities
ReasoningTool callingStructured outputFile attachmentsTemperature controlOpen weights
Reasoning options
- effort low · medium · high
Pricing
USD per million tokens, list API rates.
- Input
- $2
- Output
- $8
- Cache read
- $0.5
- Cache write
- —
Modalities
- Input
- Text, Image, Pdf
- Output
- Text