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Gemini 4 Carbon vs Grok-1.5

Gemini 4 Carbon leads the LLM Stats Score 59.0 to -3.1.

Google · xAI · Updated for 2026

Which is better?

Gemini 4 Carbon leads the overall LLM Stats Score 59.0 to -3.1, 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
  • you want the most recent training data — it shipped Oct 2026

Choose Grok-1.5

  • you are already invested in the xAI ecosystem

At a glance

The differences that matter most.

Gemini 4 Carbon
Google
Grok-1.5
xAI
Core performance indexes
LLM Stats Score
59.0
#2
-3.1
#377
Reasoning
54.9
#5
-2.6
#367
Coding
48.1
#3
-1.0
#280
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
— / M
Output price
— / M
— / M
Context window
—
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Gemini 4 Carbon
Grok-1.5
Vision
36.0#12
-5.3#230
Multimodal
38.0#6
-2.8#183
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

16 reported for Gemini 4 Carbon · 9 for Grok-1.5

No common benchmarks found

Gemini 4 Carbon and Grok-1.5don'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

Gemini 4 Carbon supports multimodal inputs, whereas Grok-1.5 does not.

Gemini 4 Carbon can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 4 Carbon

Text
Images
Audio
Video

Grok-1.5

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.

Gemini 4 Carbon

Proprietary

Closed source

Grok-1.5

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 4 Carbon was released on 2026-10-28, while Grok-1.5 was released on 2024-03-28.

Gemini 4 Carbon is 31 months newer than Grok-1.5.

Gemini 4 Carbon

Oct 28, 2026

1 days ago

2.6yr newer
Grok-1.5

Mar 28, 2024

2.6 years ago

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?

Judge for yourself.

Run your own prompts against Gemini 4 Carbon and Grok-1.5 side-by-side, then vote on the output you prefer.

Gemini 4 Carbon
✓ Preferred
Grok-1.5
Open in Playground

FAQ

Common questions about Gemini 4 Carbon vs Grok-1.5.

Which is better, Gemini 4 Carbon or Grok-1.5?

Gemini 4 Carbon leads the LLM Stats Score 59.0 to -3.1. Gemini 4 Carbon is made by Google and Grok-1.5 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-1.5 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-1.5 scores GSM8k: 90.0%, DocVQA: 85.6%, MMLU: 81.3%, HumanEval: 74.1%, MMMU: 53.6%.

What are the main differences between Gemini 4 Carbon and Grok-1.5?

Key differences include LLM Stats Score (59.0 vs -3.1), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 4 Carbon and Grok-1.5?

Gemini 4 Carbon is developed by Google and Grok-1.5 is developed by xAI.

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