OpenAI · Reasoning Flagship

o1 API Pricing · Cost per Token

OpenAI o1 is the first-generation frontier reasoning model. Excels at complex reasoning, STEM problems, and tasks requiring multi-step logic chains.

Current pricing

  • Input tokens: $15.00 per 1M tokens
  • Output tokens: $60.00 per 1M tokens
  • Context window: 200k tokens
  • Provider: OpenAI

Cost at common workload volumes

  • 1,000 requests/day (500 input + 300 output tokens each): calculate in the cost calculator below
  • Prompt caching: available on select OpenAI models to reduce repeated-context costs
  • Batch API: 50% discount for async workloads on eligible models
Calculate my o1 cost