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Gemini 4 Carbon vs Grok-4 Fast Non-Reasoning

Comparing Gemini 4 Carbon and Grok-4 Fast Non-Reasoning across benchmarks, pricing, and capabilities.

Google · xAI · Updated for 2026

Which is better?

Gemini 4 Carbon and Grok-4 Fast Non-Reasoning trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

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

Choose Gemini 4 Carbon

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

Choose Grok-4 Fast Non-Reasoning

  • you want predictable pricing at $0.20/M input and $0.50/M output

At a glance

The differences that matter most.

Gemini 4 Carbon
Google
Grok-4 Fast Non-Reasoning
xAI
Benchmark wins
—
—
Input price
— / M
$0.20 / M
Output price
— / M
$0.50 / M
Context window
—
2,000,000

Individual benchmarks

16 reported for Gemini 4 Carbon · 0 for Grok-4 Fast Non-Reasoning

No common benchmarks found

Gemini 4 Carbon and Grok-4 Fast Non-Reasoningdon'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

Context Window

Maximum input and output token capacity

Only Grok-4 Fast Non-Reasoning specifies input context (2,000,000 tokens). Only Grok-4 Fast Non-Reasoning specifies output context (30,000 tokens).

Google
Gemini 4 Carbon
Input- tokens
Output- tokens
xAI
Grok-4 Fast Non-Reasoning
Input2,000,000 tokens
Output30,000 tokens
Mon Nov 09 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Gemini 4 Carbon and Grok-4 Fast Non-Reasoning 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 Fast Non-Reasoning

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 Fast Non-Reasoning

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 4 Carbon was released on 2026-10-28, while Grok-4 Fast Non-Reasoning was released on 2025-08-28.

Gemini 4 Carbon is 14 months newer than Grok-4 Fast Non-Reasoning.

Gemini 4 Carbon

Oct 28, 2026

1 weeks ago

1.2yr newer
Grok-4 Fast Non-Reasoning

Aug 28, 2025

1.2 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-4 Fast Non-Reasoning side-by-side, then vote on the output you prefer.

Gemini 4 Carbon
✓ Preferred
Grok-4 Fast Non-Reasoning
Open in Playground

FAQ

Common questions about Gemini 4 Carbon vs Grok-4 Fast Non-Reasoning.

Which is better, Gemini 4 Carbon or Grok-4 Fast Non-Reasoning?

Gemini 4 Carbon (Google) and Grok-4 Fast Non-Reasoning (xAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Gemini 4 Carbon compare to Grok-4 Fast Non-Reasoning 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%.

What are the context window sizes for Gemini 4 Carbon and Grok-4 Fast Non-Reasoning?

Gemini 4 Carbon supports an unknown number of tokens and Grok-4 Fast Non-Reasoning supports 2.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Who makes Gemini 4 Carbon and Grok-4 Fast Non-Reasoning?

Gemini 4 Carbon is developed by Google and Grok-4 Fast Non-Reasoning is developed by xAI.

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