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Kimi K2-Instruct-0905 vs Nova 2 Omni

Nova 2 Omni significantly outperforms across most benchmarks.

Moonshot AI · Amazon · Updated for 2026

Which is better?

Kimi K2-Instruct-0905 outperforms in 1 benchmarks (MMLU-Pro), while Nova 2 Omni is better at 5 benchmarks (AIME 2025, Multi-Challenge, Tau2 Airline, Tau2 Retail, Tau2 Telecom). Nova 2 Omni significantly outperforms across most benchmarks.

Based on current benchmark, pricing, and model metadata for 2026.

Choose Kimi K2-Instruct-0905

  • you need open weights you can self-host or fine-tune

Choose Nova 2 Omni

  • you want the strongest raw capability — it leads on 5 of 6 shared benchmarks
  • you want the most recent training data — it shipped Dec 2025

At a glance

The differences that matter most.

Kimi K2-Instruct-0905
Moonshot AI
Nova 2 Omni
Amazon
Benchmark wins
1 of 6
5 of 6
Input price
— / M
— / M
Output price
— / M
— / M
Context window
—
—
Released
Sep 2025
Dec 2025
License
MIT
Proprietary

Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

Kimi K2-Instruct-0905 outperforms in 1 benchmarks (MMLU-Pro), while Nova 2 Omni is better at 5 benchmarks (AIME 2025, Multi-Challenge, Tau2 Airline, Tau2 Retail, Tau2 Telecom).

Nova 2 Omni significantly outperforms across most benchmarks.

Mon Aug 24 2026 • llm-stats.com

Arena Performance

Playground indexes and blind preference scores

Input Capabilities

Supported data types and modalities

Nova 2 Omni supports multimodal inputs, whereas Kimi K2-Instruct-0905 does not.

Nova 2 Omni can handle both text and other forms of data like images, making it suitable for multimodal applications.

Kimi K2-Instruct-0905

Text
Images
Audio
Video

Nova 2 Omni

Text
Images
Audio
Video

License

Usage and distribution terms

Kimi K2-Instruct-0905 is licensed under MIT, while Nova 2 Omni uses a proprietary license.

License differences may affect how you can use these models in commercial or open-source projects.

Kimi K2-Instruct-0905

MIT

Open weights

Nova 2 Omni

Proprietary

Closed source

Release Timeline

When each model was launched

Kimi K2-Instruct-0905 was released on 2025-09-05, while Nova 2 Omni was released on 2025-12-02.

Nova 2 Omni is 3 months newer than Kimi K2-Instruct-0905.

Kimi K2-Instruct-0905

Sep 5, 2025

11 months ago

Nova 2 Omni

Dec 2, 2025

8 months ago

2mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Kimi K2-Instruct-0905 and Nova 2 Omni side-by-side, then vote on the output you prefer.

Kimi K2-Instruct-0905
✓ Preferred
Nova 2 Omni
Open in Playground

FAQ

Common questions about Kimi K2-Instruct-0905 vs Nova 2 Omni.

Which is better, Kimi K2-Instruct-0905 or Nova 2 Omni?

Nova 2 Omni significantly outperforms across most benchmarks. Kimi K2-Instruct-0905 is made by Moonshot AI and Nova 2 Omni is made by Amazon. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Kimi K2-Instruct-0905 compare to Nova 2 Omni in benchmarks?

Kimi K2-Instruct-0905 scores MATH-500: 97.4%, MMLU-Redux: 92.7%, IFEval: 89.8%, AutoLogi: 89.5%, MMLU: 89.5%. Nova 2 Omni scores AIME 2025: 92.1%, RefCOCOg: 86.3%, ScreenSpot: 85.4%, MMLU-Pro: 80.7%, Tau2 Telecom: 80.0%.

What are the main differences between Kimi K2-Instruct-0905 and Nova 2 Omni?

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

Who makes Kimi K2-Instruct-0905 and Nova 2 Omni?

Kimi K2-Instruct-0905 is developed by Moonshot AI and Nova 2 Omni is developed by Amazon.

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