Model Comparison

Gemini 3.5 Flash Cyber vs Grok-4Which is better in 2026?

Comparing Gemini 3.5 Flash Cyber and Grok-4 across benchmarks, pricing, and capabilities.

Verdict: Gemini 3.5 Flash Cyber vs Grok-4 — which is better?

Gemini 3.5 Flash Cyber (by Google) and Grok-4 (by xAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Choose Gemini 3.5 Flash Cyber if…

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

Choose Grok-4 if…

  • you want predictable pricing at $3.00/M input and $15.00/M output

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Gemini 3.5 Flash Cyber and Grok-4don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Grok-4 specifies input context (256,000 tokens). Only Grok-4 specifies output context (8,000 tokens).

Google
Gemini 3.5 Flash Cyber
Input- tokens
Output- tokens
xAI
Grok-4
Input256,000 tokens
Output8,000 tokens
Tue Jul 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok-4 supports multimodal inputs, whereas Gemini 3.5 Flash Cyber does not.

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

Gemini 3.5 Flash Cyber

Text
Images
Audio
Video

Grok-4

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 3.5 Flash Cyber

Proprietary

Closed source

Grok-4

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.5 Flash Cyber was released on 2026-07-21, while Grok-4 was released on 2025-07-09.

Gemini 3.5 Flash Cyber is 13 months newer than Grok-4.

Gemini 3.5 Flash Cyber

Jul 21, 2026

0 days ago

1.0yr newer
Grok-4

Jul 9, 2025

1.0 years ago

Knowledge Cutoff

When training data ends

Grok-4 has a documented knowledge cutoff of 2024-12-31, while Gemini 3.5 Flash Cyber's cutoff date is not specified.

We can confirm Grok-4's training data extends to 2024-12-31, but cannot make a direct comparison without Gemini 3.5 Flash Cyber's cutoff date.

Gemini 3.5 Flash Cyber

—

Grok-4

Dec 2024

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google

No standout differentiators in the data we have for this pair.

xAI
Larger context window (256,000 tokens)
Supports multimodal inputs
GoogleGemini 3.5 Flash Cyber
xAIGrok-4
Compare in Playground

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini 3.5 Flash Cyber and Grok-4 side-by-side, then vote on the output you prefer.

Gemini 3.5 Flash Cyber
✓ Preferred
Grok-4
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 3.5 Flash Cyber
xAI
Grok-4

FAQ

Common questions about Gemini 3.5 Flash Cyber vs Grok-4.

Which is better, Gemini 3.5 Flash Cyber or Grok-4?

Gemini 3.5 Flash Cyber (Google) and Grok-4 (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 3.5 Flash Cyber compare to Grok-4 in benchmarks?

Gemini 3.5 Flash Cyber scores CyberGym: 83.2%. Grok-4 scores AIME 2025: 91.7%, HMMT25: 90.0%, GPQA: 87.5%, LiveCodeBench: 79.0%, Humanity's Last Exam: 40.0%.

What are the context window sizes for Gemini 3.5 Flash Cyber and Grok-4?

Gemini 3.5 Flash Cyber supports an unknown number of tokens and Grok-4 supports 256K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3.5 Flash Cyber and Grok-4?

Key differences include multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.5 Flash Cyber and Grok-4?

Gemini 3.5 Flash Cyber is developed by Google and Grok-4 is developed by xAI.

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