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Discover how Open AI's o3 Mini and Open AI's GPT-5 stack up against each other in this comprehensive comparison of two leading AI
language models.
Released in January 2025 and August 2025 respectively, these models represent significant advancements in artificial intelligence,
with o3 Mini offering a 200,000-token context
window and GPT-5 featuring a 400,000-token
capacity. Their distinct approaches to natural language processing are reflected in their
benchmark performances, making this comparison essential for developers and organizations seeking the right AI
solution for their specific needs.
Models Overview
 o3 Mini | GPT-5 | |
|---|---|---|
Provider Company that developed the model | Open AI | Open AI |
Context Length Maximum number of tokens the model can process | 200K | 400K |
Maximum Output Maximum number of tokens the model can generate in a single response | 100K | 128K |
Release Date Date when the model was released | 31-01-2025 | 07-08-2025 |
Knowledge Cutoff Training data cutoff date | October 2023 | September 2024 |
Open Source Whether the model's code is open-source | FALSE | FALSE |
API Providers API providers that offer access to the model | OpenAI API | OpenAI API |
Pricing Comparison
Compare the pricing of Open AI's o3 Mini and Open AI's GPT-5 to determine the most cost-effective solution for your AI needs.
| o3 Mini | GPT-5 | |
|---|---|---|
Input Cost Cost per million input tokens | $1.1 / 1M tokens | $1.25 / 1M tokens |
Output Cost Cost per million tokens generated | $0.55 / 1M tokens | $10 / 1M tokens |
Comparing Benchmarks and Performance
Compare the performances of Open AI's o3 Mini and Open AI's GPT-5 on industry benchmarks. This section provides a detailed comparison on MMLU, MMMU, HumanEval, MATH and other key benchmarks.
| o3 Mini | GPT-5 | |
|---|---|---|
MMLU Evaluating LLM knowledge acquisition in zero-shot and few-shot settings. | 86.9% | Benchmark not available |
MMMU A wide ranging multi-discipline and multimodal benchmark. | Benchmark not available | 74.4% |
HellaSwag A challenging sentence completion benchmark. | Benchmark not available | Benchmark not available |
GSM8K Grade-school math problems benchmark. | Benchmark not available | Benchmark not available |
HumanEval A benchmark to measure functional correctness for synthesizing programs from docstrings. | 97% | Benchmark not available |
MATH Benchmark performance on Math problems ranging across 5 levels of difficulty and 7 sub-disciplines. | 97.9% | Benchmark not available |
