GPT-5.3 Codex Spark
OpenAI · Coding-optimized GPT model for repository edits, reviews, and agentic software work
Key facts
- Provider
- OpenAI
- Context window
- 128K tokens
- Max output
- 32K tokens
- Input price
- $1.75 / M tok
- Output price
- $14 / M tok
- Knowledge cutoff
- Aug 31, 2025
- Released
- Feb 5, 2026
- License
- —
Capabilities
ReasoningTool callingStructured outputFile attachmentsTemperature controlOpen weights
Reasoning options
- effort none · low · medium · high · xhigh
Pricing
USD per million tokens, list API rates.
- Input
- $1.75
- Output
- $14
- Cache read
- $0.175
- Cache write
- —
Modalities
- Input
- Text, Image, Pdf
- Output
- Text