Model Comparison

Kimi K2 0905 vs o1-proWhich is better in 2026?

o1-pro significantly outperforms across most benchmarks.

Verdict: Kimi K2 0905 vs o1-pro — which is better?

Kimi K2 0905 (by Moonshot AI) 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.

Kimi K2 0905 outperforms in 0 benchmarks, while o1-pro is better at 2 benchmarks (AIME 2024, GPQA). o1-pro significantly outperforms across most benchmarks.

Choose Kimi K2 0905 if…

  • you want the most recent training data — it shipped Sep 2025

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

Kimi K2 0905 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 Kimi K2 0905 specifies input context (262,144 tokens). Only Kimi K2 0905 specifies output context (262,144 tokens).

Moonshot AI
Kimi K2 0905
Input262,144 tokens
Output262,144 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 Kimi K2 0905 does not.

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

Kimi K2 0905

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.

Kimi K2 0905

Proprietary

Closed source

o1-pro

Proprietary

Closed source

Release Timeline

When each model was launched

Kimi K2 0905 was released on 2025-09-05, while o1-pro was released on 2024-12-17.

Kimi K2 0905 is 9 months newer than o1-pro.

Kimi K2 0905

Sep 5, 2025

9 months ago

8mo newer
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 Kimi K2 0905'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 Kimi K2 0905's cutoff date.

Kimi K2 0905

—

o1-pro

Sep 2023

Outputs Comparison

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Key Takeaways

Moonshot AI
Larger context window (262,144 tokens)
OpenAI
Supports multimodal inputs
Higher AIME 2024 score (86.0% vs 72.0%)
Higher GPQA score (79.0% vs 75.8%)

Detailed Comparison

AI Model Comparison Table
Feature
Moonshot AI
Kimi K2 0905
OpenAI
o1-pro

FAQ

Common questions about Kimi K2 0905 vs o1-pro.

Which is better, Kimi K2 0905 or o1-pro?

o1-pro significantly outperforms across most benchmarks. Kimi K2 0905 is made by Moonshot AI 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 Kimi K2 0905 compare to o1-pro in benchmarks?

Kimi K2 0905 scores HumanEval: 94.5%, MMLU: 90.2%, MATH: 89.1%, MMLU-Pro: 82.5%, GPQA: 75.8%. o1-pro scores AIME 2024: 86.0%, GPQA: 79.0%.

What are the context window sizes for Kimi K2 0905 and o1-pro?

Kimi K2 0905 supports 262K 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 Kimi K2 0905 and o1-pro?

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

Who makes Kimi K2 0905 and o1-pro?

Kimi K2 0905 is developed by Moonshot AI and o1-pro is developed by OpenAI.

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