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Gemini 4 Carbon vs Grok-4 Heavy

Gemini 4 Carbon leads the LLM Stats Score 59.0 to 40.2.

Google · xAI · Updated for 2026

Which is better?

Gemini 4 Carbon leads the overall LLM Stats Score 59.0 to 40.2, ranking #2 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Gemini 4 Carbon

  • overall performance matters — it scores 59.0 and ranks #2 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes

Choose Grok-4 Heavy

  • you are already invested in the xAI ecosystem

At a glance

The differences that matter most.

Gemini 4 Carbon
Google
Grok-4 Heavy
xAI
Core performance indexes
LLM Stats Score
59.0
#2
40.2
#76
Reasoning
54.9
#5
38.6
#78
Coding
48.1
#3
17.6
#142
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
— / M
Output price
— / M
— / M
Context window
—
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Individual benchmarks

16 reported for Gemini 4 Carbon · 6 for Grok-4 Heavy

No common benchmarks found

Gemini 4 Carbon and Grok-4 Heavydon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Input capabilities

Documented input modalities across available providers

Both Gemini 4 Carbon and Grok-4 Heavy support multimodal inputs.

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

Gemini 4 Carbon

Text
Images
Audio
Video

Grok-4 Heavy

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.

Gemini 4 Carbon

Proprietary

Closed source

Grok-4 Heavy

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 4 Carbon was released on 2026-10-28, while Grok-4 Heavy's release date is not specified.

We can confirm Gemini 4 Carbon's release timeline, but cannot make a direct age comparison without Grok-4 Heavy's release date.

Gemini 4 Carbon

Oct 28, 2026

-3 days ago

Grok-4 Heavy

—

Knowledge Cutoff

When training data ends

Grok-4 Heavy has a documented knowledge cutoff of 2024-12-31, while Gemini 4 Carbon's cutoff date is not specified.

We can confirm Grok-4 Heavy's training data extends to 2024-12-31, but cannot make a direct comparison without Gemini 4 Carbon's cutoff date.

Gemini 4 Carbon

—

Grok-4 Heavy

Dec 2024

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Gemini 4 Carbon and Grok-4 Heavy side-by-side, then vote on the output you prefer.

Gemini 4 Carbon
✓ Preferred
Grok-4 Heavy
Open in Playground

FAQ

Common questions about Gemini 4 Carbon vs Grok-4 Heavy.

Which is better, Gemini 4 Carbon or Grok-4 Heavy?

Gemini 4 Carbon leads the LLM Stats Score 59.0 to 40.2. Gemini 4 Carbon is made by Google and Grok-4 Heavy is made by xAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemini 4 Carbon compare to Grok-4 Heavy in benchmarks?

Gemini 4 Carbon scores Gray Swan IPI Benchmark: 100.0%, Vending-Bench 2: 100.0%, Graphwalks BFS >128k: 96.2%, WebDev Arena: 88.4%, SEC-bench Pro: 88.2%. Grok-4 Heavy scores AIME 2025: 100.0%, HMMT25: 96.7%, GPQA: 88.4%, LiveCodeBench: 79.4%, USAMO25: 61.9%.

What are the main differences between Gemini 4 Carbon and Grok-4 Heavy?

Key differences include LLM Stats Score (59.0 vs 40.2). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 4 Carbon and Grok-4 Heavy?

Gemini 4 Carbon is developed by Google and Grok-4 Heavy is developed by xAI.

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