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Grok 4.6 vs Kimi-k1.5

Comparing Grok 4.6 and Kimi-k1.5 across benchmarks, pricing, and capabilities.

xAI · Moonshot AI · Updated for 2026

Which is better?

Grok 4.6 and Kimi-k1.5 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-k1.5

  • you are already invested in the Moonshot AI ecosystem

At a glance

The differences that matter most.

Grok 4.6
xAI
Kimi-k1.5
Moonshot AI
Benchmark wins
—
—
Input price
$2.00 / M
— / M
Output price
$6.00 / M
— / M
Context window
500,000
—
Released
Aug 2026
Jan 2025
License
Proprietary
Proprietary

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Grok 4.6 and Kimi-k1.5don'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-k1.5
Input- tokens
Output- tokens
Mon Aug 24 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Grok 4.6 and Kimi-k1.5 support multimodal inputs.

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

Grok 4.6

Text
Images
Audio
Video

Kimi-k1.5

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.

Grok 4.6

Proprietary

Closed source

Kimi-k1.5

Proprietary

Closed source

Release Timeline

When each model was launched

Grok 4.6 was released on 2026-08-12, while Kimi-k1.5 was released on 2025-01-20.

Grok 4.6 is 19 months newer than Kimi-k1.5.

Grok 4.6

Aug 12, 2026

1 weeks ago

1.6yr newer
Kimi-k1.5

Jan 20, 2025

1.6 years ago

Knowledge Cutoff

When training data ends

Grok 4.6 has a documented knowledge cutoff of 2026-02-01, while Kimi-k1.5'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-k1.5's cutoff date.

Grok 4.6

Feb 2026

Kimi-k1.5

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Grok 4.6 and Kimi-k1.5 side-by-side, then vote on the output you prefer.

Grok 4.6
✓ Preferred
Kimi-k1.5
Open in Playground

FAQ

Common questions about Grok 4.6 vs Kimi-k1.5.

Which is better, Grok 4.6 or Kimi-k1.5?

Grok 4.6 (xAI) and Kimi-k1.5 (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-k1.5 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-k1.5 scores MATH-500: 96.2%, CLUEWSC: 91.4%, C-Eval: 88.3%, MMLU: 87.4%, IFEval: 87.2%.

What are the context window sizes for Grok 4.6 and Kimi-k1.5?

Grok 4.6 supports 500K tokens and Kimi-k1.5 supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Who makes Grok 4.6 and Kimi-k1.5?

Grok 4.6 is developed by xAI and Kimi-k1.5 is developed by Moonshot AI.

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