The AI tools directory — Find the Best AI Tools

OpenAI o3

The pinnacle of AI reasoning from OpenAI

Categories: AI Agents, Code Assistant, Chatbots
OpenAI o3 is the most powerful model in the o-series reasoning lineup, achieving record scores on ARC-AGI and competition math benchmarks. It uses an extended thinking process to tackle the hardest coding, math, and scientific reasoning problems. Available to API users and ChatGPT Pro subscribers.

Key Features

  • Record scores on ARC-AGI benchmark
  • Extended multi-step thinking
  • Competition math performance
  • Advanced code generation
  • Available in ChatGPT Pro
  • API for developers

Use Cases

  • Hardest coding challenges
  • Frontier math and science problems
  • Complex multi-step research
  • Competitive programming
  • Advanced AI capability research
Visit OpenAI o3 →

About Nextool.ai

Nextool.ai is the largest curated directory of AI tools — 10,000+ tools across 163+ categories, free forever.

Browse all AI tools · Browse by category