o3
by OpenAI
o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. It also excels at technical writing and instru
Models
o3
Added 10 July 2026
Overview
o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. It also excels at technical writing and instruction-following....
Best for
Best for
Hard reasoning and verification steps in agent pipelines
Use cases
- plan-then-act agents
- math/logic checks
- code verification
How to use / API access
Call via OpenRouter with model id `openai/o3`.
- openrouter ·
openai/o3Docs
OpenRouter id: openai/o3
Benchmarks
- Intelligence Index (artificial-analysis): 20.2 index
- Design Arena codecategories (other): 1021 elo · #120
- Design Arena dataviz (other): 1200 elo · #59
- Design Arena gamedev (other): 1036 elo · #113
- Design Arena uicomponent (other): 1016 elo · #112
Enterprise DNA angle
Omni can stage o3 as a judge or planner while cheaper models do the volume work.
Notes
o3 is listed in the EDNA Models directory from the OpenRouter catalogue.
Pros
- Strong deliberate reasoning for hard problems
- Good fit for planning and verification steps
Cons
- Latency and cost higher than flash/mini models
- Not ideal for high-volume cheap inference
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