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o3-mini-high vs GPT-5

Detailed comparison of capabilities, features, and performance.

Feature
o3-mini-high
GPT-5
Model Image
o3-mini-high
GPT-5
AI Lab
OpenAI
OpenAI
Context Size
200,000 tokens
272,000 tokens
Max Output Size
100,000 tokens
128,000 tokens
Frontier Model
Yes
Yes
Vision Support
No
Yes
Description
o3-mini-high is the higest reasoning level of OpenAI's fast cost-efficient reasoning model tailored to coding math and science use cases
OpenAI's flagship model for coding, reasoning, and agentic tasks across domains.

Learn more about o3-mini-high

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Learn more about GPT-5

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