o3 — reviews, specs & pricing

OpenAI's advanced reasoning model for complex multi-step problems.

Summary

o3 is a reasoning-focused model that uses extended chain-of-thought to solve complex math, science and coding problems. It supports tool use during reasoning. It's aimed at the most demanding analytical tasks.

Sample use case

Used for advanced research, complex coding tasks, and multi-step agentic reasoning. Suited for scientific and mathematical problem solving.

Specifications

  • Provider: openai
  • License: closed
  • Context: 200k tokens
  • Input price: $2/M tok
  • Output price: $8/M tok
  • Released: 2025-04-16

Pros

  • State-of-the-art reasoning
  • Tool use during thought
  • Strong benchmarks

Cons

  • Higher latency
  • Expensive at scale
  • Closed weights

Average rating 0.0 from 0 community reviews on Reviuws.

Frequently asked questions

What is o3?

o3 is a reasoning-focused model that uses extended chain-of-thought to solve complex math, science and coding problems. It supports tool use during reasoning. It's aimed at the most demanding analytical tasks.

How much does o3 cost?

o3 costs $2 per million input tokens and $8 per million output tokens.

Is o3 open source?

o3 is released under the closed license.