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o3

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OpenAI's reasoning model for hard multi-step problems in mathematics, coding and science

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TrustList summary

o3 is a reasoning model from OpenAI, aimed at difficult problems that need several linked steps to solve. It is described as OpenAI's frontier reasoning model, with its stated areas of use in mathematics, coding and science.

What o3 does

  • Multi-step reasoning: built for hard problems where a reply has to work through several linked steps.
  • Mathematics: aimed at hard mathematical problems.
  • Coding: aimed at difficult programming work.
  • Science: aimed at hard scientific problems.

Who it serves

Users who need a reasoning model for hard multi-step work in mathematics, coding or science.

Key facts

  • Developer: OpenAI
  • Model type: frontier reasoning model
  • Areas of use: mathematics, coding and science

Summary written by TrustList from the business's own published information, Oct 2026.

Benchmarks & AI stats

AI model rankings
BenchmarkOfficialCommunity avg
GPQA Diamondreasoning87.7 %-
SWE-bench Verifiedcode71.7 %-

“Official” values are editor-approved and feed the ranking. “Community avg” is the mean of member submissions (shown for transparency; it never affects the ranking until an editor approves a value).

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Trust Score

4/ 100
Trust Score: New

An earned signal from verification, reviews, awards, transparency and engagement - the vendor can't buy it.

Verification
0/100 · 20%
Reviews
0/100 · 30%
Awards
0/100 · 15%
Transparency
18/100 · 20%
Engagement
0/100 · 15%
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Recommendations
Coming soon
Complaints
Coming soon

Updated 9/16/2026

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