OpenAI o1 — AI Tool Review, Features, Pricing & Alternatives (2026)

reasoning openai math science chain of thought

OpenAI o1 is a reasoning-first AI model that ‘thinks before answering,’ excelling at complex math, science, and coding problems that require deep step-by-step logic.

95
Quality Score

94
Usefulness

Paid
Pricing

What is OpenAI o1?

OpenAI o1 is OpenAI’s reasoning-focused model series that uses chain-of-thought reasoning to solve complex problems. Unlike GPT-4 which answers immediately, o1 spends time ‘thinking’ through problems step by step, achieving state-of-the-art results on math olympiad problems, competitive coding, and scientific reasoning. Available to ChatGPT Plus users and via API.

✅ Pros

  • Exceptional math and science reasoning
  • PhD-level problem solving
  • Handles ambiguous multi-step problems
  • Strong at competitive programming
  • Transparent reasoning process

⚠️ Cons

  • Slower than GPT-4o
  • More expensive via API
  • Less suited for simple/fast queries

Best Use Cases for OpenAI o1

  • Math and science problem solving
  • Complex code debugging
  • Research analysis
  • Legal reasoning
  • Financial modeling

Frequently Asked Questions

What is OpenAI o1?

OpenAI o1 is OpenAI’s reasoning-focused model series that uses chain-of-thought reasoning to solve complex problems. Unlike GPT-4 which answers immediately, o1 spends time ‘thinking’ through problems step by step, achieving state-of-the-art results on math olympiad problems, competitive coding, and scientific reasoning. Available to ChatGPT Plus users and via API.

Is OpenAI o1 free to use?

OpenAI o1 offers Paid pricing. A paid subscription is required.

What is OpenAI o1 best for?

OpenAI o1 is best for: Math and science problem solving, Complex code debugging, Research analysis, Legal reasoning, Financial modeling.

What are the pros of OpenAI o1?

Exceptional math and science reasoning. PhD-level problem solving. Handles ambiguous multi-step problems. Strong at competitive programming. Transparent reasoning process.

What are the alternatives to OpenAI o1?

Browse our full list of AI tools to find alternatives in the AI Reasoning Model category.

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