OpenAI o1 vs OpenAI o3 — Which Is Better in 2026?
OpenAI o1 vs OpenAI o3: independent head-to-head scored on Performance, Value, Reliability, and Ease of Use. See scores, pros, cons, and our verdict.
OpenAI
OpenAI o1
Best AI for hard reasoning and math
OpenAI
OpenAI o3
Best AI for hard math, science, and coding
8.0
Overall Score
WINNER7.9
Overall Score
Our Verdict
OpenAI o1 scores higher overall (8.0/10 vs 7.9/10), winning on Value. Best AI for hard reasoning, math, and science. Expensive and slow but uniquely powerful.
Pricing — OpenAI o1
API: $15/M input · $60/M output · Pro plan
Pricing — OpenAI o3
ChatGPT Pro $200/mo · API: usage-based
OpenAI o1
Pros
- ✓Best multi-step mathematical reasoning available
- ✓Excels at PhD-level problem solving
- ✓Think-before-answer approach reduces errors
Cons
- ✗Much slower than standard GPT models
- ✗Very expensive for routine use
- ✗Not suitable for conversational or creative tasks
Best For
Complex math, scientific reasoning, hard coding challenges, research problems
OpenAI o3
Pros
- ✓#1 on reasoning and math benchmarks
- ✓Tops SWE-bench for autonomous coding
- ✓Extended thinking for complex multi-step problems
Cons
- ✗Slow — designed for deliberate thinking, not chat
- ✗Expensive API pricing
- ✗Overkill for simple tasks
Best For
PhD-level research, competitive programming, hard science problems
Choose OpenAI o1 if…
- →Value is your top priority — OpenAI o1 leads by 0.5 points
- →Complex math
- →OpenAI support, documentation, and community suit your team
Choose OpenAI o3 if…
- →Performance is your top priority — OpenAI o3 leads by 0.3 points
- →PhD-level research
- →OpenAI support, documentation, and community suit your team
Frequently Asked Questions
Is OpenAI o1 better than OpenAI o3?
OpenAI o1 scores 8.0/10 overall vs 7.9/10 for OpenAI o3, with an edge on Value. That said, "OpenAI o3" may be the better pick if performance is your priority. The right choice depends on your use case.
What is the pricing difference between OpenAI o1 and OpenAI o3?
OpenAI o1: API: $15/M input · $60/M output · Pro plan. OpenAI o3: ChatGPT Pro $200/mo · API: usage-based. Compare usage volumes and features needed to determine total cost of ownership for your team.
Which is better for complex math?
OpenAI o1 is generally stronger here, scoring 8.0/10 overall. Best AI for hard reasoning, math, and science. Expensive and slow but uniquely powerful. For more niche requirements like performance, OpenAI o3 may be worth evaluating.
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