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Grok 4.6 vs Kimi K2 Base

Comparing Grok 4.6 and Kimi K2 Base across benchmarks, pricing, and capabilities.

xAI · Moonshot AI · Updated for 2026

Which is better?

Grok 4.6 and Kimi K2 Base trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

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

Choose Grok 4.6

  • you want the most recent training data — it shipped Aug 2026

Choose Kimi K2 Base

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

At a glance

The differences that matter most.

Grok 4.6
xAI
Kimi K2 Base
Moonshot AI
Benchmark wins
—
—
Input price
$2.00 / M
— / M
Output price
$6.00 / M
— / M
Context window
500,000
—
Released
Aug 2026
Jul 2025
License
Proprietary
MIT

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Grok 4.6 and Kimi K2 Basedon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Playground indexes and blind preference scores

Context Window

Maximum input and output token capacity

Only Grok 4.6 specifies input context (500,000 tokens).

xAI
Grok 4.6
Input500,000 tokens
Output- tokens
Moonshot AI
Kimi K2 Base
Input- tokens
Output- tokens
Mon Aug 24 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok 4.6 supports multimodal inputs, whereas Kimi K2 Base does not.

Grok 4.6 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok 4.6

Text
Images
Audio
Video

Kimi K2 Base

Text
Images
Audio
Video

License

Usage and distribution terms

Grok 4.6 is licensed under a proprietary license, while Kimi K2 Base uses MIT.

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

Grok 4.6

Proprietary

Closed source

Kimi K2 Base

MIT

Open weights

Release Timeline

When each model was launched

Grok 4.6 was released on 2026-08-12, while Kimi K2 Base was released on 2025-07-11.

Grok 4.6 is 13 months newer than Kimi K2 Base.

Grok 4.6

Aug 12, 2026

1 weeks ago

1.1yr newer
Kimi K2 Base

Jul 11, 2025

1.1 years ago

Knowledge Cutoff

When training data ends

Grok 4.6 has a documented knowledge cutoff of 2026-02-01, while Kimi K2 Base's cutoff date is not specified.

We can confirm Grok 4.6's training data extends to 2026-02-01, but cannot make a direct comparison without Kimi K2 Base's cutoff date.

Grok 4.6

Feb 2026

Kimi K2 Base

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Grok 4.6 and Kimi K2 Base side-by-side, then vote on the output you prefer.

Grok 4.6
✓ Preferred
Kimi K2 Base
Open in Playground

FAQ

Common questions about Grok 4.6 vs Kimi K2 Base.

Which is better, Grok 4.6 or Kimi K2 Base?

Grok 4.6 (xAI) and Kimi K2 Base (Moonshot AI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Grok 4.6 compare to Kimi K2 Base in benchmarks?

Grok 4.6 scores CursorBench v3.2: 69.9%, DeepSWE 1.1: 65.9%, FrontierCode: 61.3%, AA-Index: 61.0%, GDPval-AA: 58.4%. Kimi K2 Base scores C-Eval: 92.5%, GSM8k: 92.1%, MMLU-redux-2.0: 90.2%, MMLU: 87.8%, TriviaQA: 85.1%.

What are the context window sizes for Grok 4.6 and Kimi K2 Base?

Grok 4.6 supports 500K tokens and Kimi K2 Base 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 Grok 4.6 and Kimi K2 Base?

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

Who makes Grok 4.6 and Kimi K2 Base?

Grok 4.6 is developed by xAI and Kimi K2 Base is developed by Moonshot AI.

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