GPT-5.6
Frontier GPT-5.6 model for complex professional work, coding, and agentic workflows
Model facts
- Context window
- 1.05M tokens
- Maximum output
- 128K tokens
- Cheapest paid input
- $1.5 per 1M tokens
- Cheapest paid output
- $12 per 1M tokens
- Open weights
- no
- Providers
- 2
Capabilities and modalities
reasoning, tool calling, structured output, attachments, text, image, pdf.
Observed price history
- 2026-08-24: $1.5 input / $12 output per 1M tokens
API providers
- Xpersona — model id gpt-5.6; $1.5 input / $12 output per 1M tokens; provider documentation
- OpenAI — model id gpt-5.6; $4 input / $20 output per 1M tokens; provider documentation