Gemini 3 Flash vs Grok-4 Comparison

Comparing Gemini 3 Flash and Grok-4 across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Gemini 3 Flash outperforms in 4 benchmarks (AIME 2025, ARC-AGI v2, GPQA, Humanity's Last Exam), while Grok-4 is better at 0 benchmarks.

Gemini 3 Flash significantly outperforms across most benchmarks.

Tue Mar 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 3 Flash costs less

For input processing, Gemini 3 Flash ($0.50/1M tokens) is 6.0x cheaper than Grok-4 ($3.00/1M tokens).

For output processing, Gemini 3 Flash ($3.00/1M tokens) is 5.0x cheaper than Grok-4 ($15.00/1M tokens).

In conclusion, Grok-4 is more expensive than Gemini 3 Flash.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Tue Mar 17 2026 • llm-stats.com
Google
Gemini 3 Flash
Input tokens$0.50
Output tokens$3.00
Best providerGoogle
xAI
Grok-4
Input tokens$3.00
Output tokens$15.00
Best providerxAI
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Context Window

Maximum input and output token capacity

Gemini 3 Flash accepts 1,000,000 input tokens compared to Grok-4's 256,000 tokens. Gemini 3 Flash can generate longer responses up to 65,536 tokens, while Grok-4 is limited to 8,000 tokens.

Google
Gemini 3 Flash
Input1,000,000 tokens
Output65,536 tokens
xAI
Grok-4
Input256,000 tokens
Output8,000 tokens
Tue Mar 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3 Flash and Grok-4 support multimodal inputs.

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

Gemini 3 Flash

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 Flash

Proprietary

Closed source

Grok-4

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3 Flash was released on 2025-12-17, while Grok-4 was released on 2025-07-09.

Gemini 3 Flash is 5 months newer than Grok-4.

Gemini 3 Flash

Dec 17, 2025

3 months ago

5mo newer
Grok-4

Jul 9, 2025

8 months ago

Knowledge Cutoff

When training data ends

Gemini 3 Flash has a knowledge cutoff of 2025-01-31, while Grok-4 has a cutoff of 2024-12-31.

Gemini 3 Flash has more recent training data (up to 2025-01-31), making it potentially better informed about events through that date compared to Grok-4 (2024-12-31).

Gemini 3 Flash

Jan 2025

1 mo newer
Grok-4

Dec 2024

Provider Availability

Gemini 3 Flash is available from Google. Grok-4 is available from xAI. The availability of providers can affect quality of the model and reliability.

Gemini 3 Flash

google logo
Google
Input Price:Input: $0.50/1MOutput Price:Output: $3.00/1M

Grok-4

xai logo
xAI
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Google
Larger context window (1,000,000 tokens)
Less expensive input tokens
Less expensive output tokens
Higher AIME 2025 score (99.7% vs 91.7%)
Higher ARC-AGI v2 score (33.6% vs 15.9%)
Higher GPQA score (90.4% vs 87.5%)
Higher Humanity's Last Exam score (43.5% vs 40.0%)
xAI
GoogleGemini 3 Flash
xAIGrok-4
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Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 3 Flash
xAI
Grok-4