Model Comparison

Kimi K3 vs o1-proWhich is better in 2026?

Kimi K3 significantly outperforms across most benchmarks.

Verdict: Kimi K3 vs o1-pro — which is better?

Kimi K3 (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 K3 outperforms in 1 benchmarks (GPQA), while o1-pro is better at 0 benchmarks. Kimi K3 significantly outperforms across most benchmarks.

Choose Kimi K3 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026

Choose o1-pro if…

  • you are already invested in the OpenAI ecosystem

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Kimi K3 outperforms in 1 benchmarks (GPQA), while o1-pro is better at 0 benchmarks.

Kimi K3 significantly outperforms across most benchmarks.

Sun Jul 19 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Kimi K3 specifies input context (1,048,576 tokens). Only Kimi K3 specifies output context (1,048,576 tokens).

Moonshot AI
Kimi K3
Input1,048,576 tokens
Output1,048,576 tokens
OpenAI
o1-pro
Input- tokens
Output- tokens
Sun Jul 19 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Kimi K3 and o1-pro support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Kimi K3

Text
Images
Audio
Video

o1-pro

Text
Images
Audio
Video

Release Timeline

When each model was launched

Kimi K3 was released on 2026-07-16, while o1-pro was released on 2024-12-17.

Kimi K3 is 19 months newer than o1-pro.

Kimi K3

Jul 16, 2026

2 days ago

1.6yr newer
o1-pro

Dec 17, 2024

1.6 years ago

Knowledge Cutoff

When training data ends

o1-pro has a documented knowledge cutoff of 2023-09-30, while Kimi K3'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 K3's cutoff date.

Kimi K3

—

o1-pro

Sep 2023

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Moonshot AI
Larger context window (1,048,576 tokens)
Has open weights
Higher GPQA score (93.5% vs 79.0%)
OpenAI

No standout differentiators in the data we have for this pair.

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Kimi K3 and o1-pro side-by-side, then vote on the output you prefer.

Kimi K3
✓ Preferred
o1-pro
Open in Playground
AI Model Comparison Table
Feature
Moonshot AI
Kimi K3
OpenAI
o1-pro

FAQ

Common questions about Kimi K3 vs o1-pro.

Which is better, Kimi K3 or o1-pro?

Kimi K3 significantly outperforms across most benchmarks. Kimi K3 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 K3 compare to o1-pro in benchmarks?

Kimi K3 scores MathVision: 97.8%, DeepSearchQA: 95.0%, GPQA: 93.5%, CharXiv-R: 91.3%, BrowseComp: 91.2%. o1-pro scores AIME 2024: 86.0%, GPQA: 79.0%.

What are the context window sizes for Kimi K3 and o1-pro?

Kimi K3 supports 1.0M 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 K3 and o1-pro?

Key differences include licensing (Unknown vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Kimi K3 and o1-pro?

Kimi K3 is developed by Moonshot AI and o1-pro is developed by OpenAI.

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