Model Comparison

o1 vs o1-proWhich is better in 2026?

o1-pro significantly outperforms across most benchmarks.

Verdict: o1 vs o1-pro — which is better?

o1 (by OpenAI) and o1-pro (by OpenAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

o1 outperforms in 0 benchmarks, while o1-pro is better at 2 benchmarks (AIME 2024, GPQA). o1-pro significantly outperforms across most benchmarks.

Choose o1 if…

  • you want predictable pricing at $15.00/M input and $60.00/M output

Choose o1-pro if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

o1 outperforms in 0 benchmarks, while o1-pro is better at 2 benchmarks (AIME 2024, GPQA).

o1-pro significantly outperforms across most benchmarks.

Sat Jun 13 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only o1 specifies input context (200,000 tokens). Only o1 specifies output context (100,000 tokens).

OpenAI
o1
Input200,000 tokens
Output100,000 tokens
OpenAI
o1-pro
Input- tokens
Output- tokens
Sat Jun 13 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

o1-pro supports multimodal inputs, whereas o1 does not.

o1-pro can handle both text and other forms of data like images, making it suitable for multimodal applications.

o1

Text
Images
Audio
Video

o1-pro

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

o1

Proprietary

Closed source

o1-pro

Proprietary

Closed source

Release Timeline

When each model was launched

Both models were released on 2024-12-17.

They likely represent similar generations of model development.

o1

Dec 17, 2024

1.5 years ago

o1-pro

Dec 17, 2024

1.5 years ago

Knowledge Cutoff

When training data ends

o1-pro has a documented knowledge cutoff of 2023-09-30, while o1's cutoff date is not specified.

We can confirm o1-pro's training data extends to 2023-09-30, but cannot make a direct comparison without o1's cutoff date.

o1

—

o1-pro

Sep 2023

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (200,000 tokens)
OpenAI
Supports multimodal inputs
Higher AIME 2024 score (86.0% vs 74.3%)
Higher GPQA score (79.0% vs 78.0%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
o1
OpenAI
o1-pro

FAQ

Common questions about o1 vs o1-pro.

Which is better, o1 or o1-pro?

o1-pro significantly outperforms across most benchmarks. o1 is made by OpenAI and o1-pro is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does o1 compare to o1-pro in benchmarks?

o1 scores GSM8k: 97.1%, MATH: 96.4%, GPQA Physics: 92.8%, MMLU: 91.8%, MGSM: 89.3%. o1-pro scores AIME 2024: 86.0%, GPQA: 79.0%.

What are the context window sizes for o1 and o1-pro?

o1 supports 200K tokens and o1-pro supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between o1 and o1-pro?

Key differences include multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

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