GPT-5.3 Chat (latest)
OpenAI · Chat-tuned GPT model for conversational assistance, writing, and tool workflows
Key facts
- Provider
- OpenAI
- Context window
- 128K tokens
- Max output
- 16.4K tokens
- Input price
- $1.75 / M tok
- Output price
- $14 / M tok
- Knowledge cutoff
- Aug 31, 2025
- Released
- Mar 3, 2026
- License
- —
Capabilities
ReasoningTool callingStructured outputFile attachmentsTemperature controlOpen weights
Pricing
USD per million tokens, list API rates.
- Input
- $1.75
- Output
- $14
- Cache read
- $0.175
- Cache write
- —
Modalities
- Input
- Text, Image
- Output
- Text