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Grok 4.6 vs Seed 2.1 Pro

Grok 4.6 significantly outperforms across most benchmarks.

xAI · ByteDance · Updated for 2026

Which is better?

Grok 4.6 outperforms in 1 benchmarks (APEX-Agents), while Seed 2.1 Pro is better at 0 benchmarks. Grok 4.6 significantly outperforms across most benchmarks.

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

Choose Grok 4.6

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

Choose Seed 2.1 Pro

  • you are already invested in the ByteDance ecosystem

At a glance

The differences that matter most.

Grok 4.6
xAI
Seed 2.1 Pro
ByteDance
Benchmark wins
1 of 1
0 of 1
Input price
$2.00 / M
— / M
Output price
$6.00 / M
— / M
Context window
500,000
—
Released
Aug 2026
Jun 2026
License
Proprietary
Proprietary

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Grok 4.6 outperforms in 1 benchmarks (APEX-Agents), while Seed 2.1 Pro is better at 0 benchmarks.

Grok 4.6 significantly outperforms across most benchmarks.

Mon Aug 24 2026 • llm-stats.com

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
ByteDance
Seed 2.1 Pro
Input- tokens
Output- tokens
Mon Aug 24 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Grok 4.6 and Seed 2.1 Pro support multimodal inputs.

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

Grok 4.6

Text
Images
Audio
Video

Seed 2.1 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.

Grok 4.6

Proprietary

Closed source

Seed 2.1 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

Grok 4.6 was released on 2026-08-12, while Seed 2.1 Pro was released on 2026-06-24.

Grok 4.6 is 2 months newer than Seed 2.1 Pro.

Grok 4.6

Aug 12, 2026

1 weeks ago

1mo newer
Seed 2.1 Pro

Jun 24, 2026

2 months ago

Knowledge Cutoff

When training data ends

Grok 4.6 has a documented knowledge cutoff of 2026-02-01, while Seed 2.1 Pro'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 Seed 2.1 Pro's cutoff date.

Grok 4.6

Feb 2026

Seed 2.1 Pro

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Grok 4.6 and Seed 2.1 Pro side-by-side, then vote on the output you prefer.

Grok 4.6
✓ Preferred
Seed 2.1 Pro
Open in Playground

FAQ

Common questions about Grok 4.6 vs Seed 2.1 Pro.

Which is better, Grok 4.6 or Seed 2.1 Pro?

Grok 4.6 significantly outperforms across most benchmarks. Grok 4.6 is made by xAI and Seed 2.1 Pro is made by ByteDance. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Grok 4.6 compare to Seed 2.1 Pro 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%. Seed 2.1 Pro scores CharXiv-D: 95.5%, MathVision: 94.5%, MathVista: 90.7%, MathVerse: 89.7%, Video-MME: 89.2%.

What are the context window sizes for Grok 4.6 and Seed 2.1 Pro?

Grok 4.6 supports 500K tokens and Seed 2.1 Pro 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 Seed 2.1 Pro?

Grok 4.6 is developed by xAI and Seed 2.1 Pro is developed by ByteDance.

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