GPT-6 Sol (gpt-6-sol) is built for complex coding and agentic workflows. 1,050,000 context window, 128,000 max output tokens, April 20, 2026 knowledge cutoff.
Pricing: 10 per million input/output tokens (Standard tier). reasoning.effort supports none, low, medium, high, xhigh, max. Use Responses API for built-in tools.