GPT-4o mini vs Grok-2 Comparison

Comparing GPT-4o mini and Grok-2 across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

GPT-4o mini outperforms in 0 benchmarks, while Grok-2 is better at 6 benchmarks (GPQA, HumanEval, MATH, MathVista, MMLU, MMMU).

Grok-2 significantly outperforms across most benchmarks.

Sun Mar 22 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-4o mini costs less

For input processing, GPT-4o mini ($0.15/1M tokens) is 13.3x cheaper than Grok-2 ($2.00/1M tokens).

For output processing, GPT-4o mini ($0.60/1M tokens) is 16.7x cheaper than Grok-2 ($10.00/1M tokens).

In conclusion, Grok-2 is more expensive than GPT-4o mini.*

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

Lowest available price from all providers
Sun Mar 22 2026 • llm-stats.com
OpenAI
GPT-4o mini
Input tokens$0.15
Output tokens$0.60
Best providerAzure
xAI
Grok-2
Input tokens$2.00
Output tokens$10.00
Best providerxAI
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Context Window

Maximum input and output token capacity

Both models have the same input context window of 128,000 tokens. GPT-4o mini can generate longer responses up to 16,384 tokens, while Grok-2 is limited to 8,000 tokens.

OpenAI
GPT-4o mini
Input128,000 tokens
Output16,384 tokens
xAI
Grok-2
Input128,000 tokens
Output8,000 tokens
Sun Mar 22 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-4o mini and Grok-2 support multimodal inputs.

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

GPT-4o mini

Text
Images
Audio
Video

Grok-2

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.

GPT-4o mini

Proprietary

Closed source

Grok-2

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-4o mini was released on 2024-07-18, while Grok-2 was released on 2024-08-13.

Grok-2 is 1 month newer than GPT-4o mini.

GPT-4o mini

Jul 18, 2024

1.7 years ago

Grok-2

Aug 13, 2024

1.6 years ago

3w newer

Knowledge Cutoff

When training data ends

GPT-4o mini has a documented knowledge cutoff of 2023-10-01, while Grok-2's cutoff date is not specified.

We can confirm GPT-4o mini's training data extends to 2023-10-01, but cannot make a direct comparison without Grok-2's cutoff date.

GPT-4o mini

Oct 2023

Grok-2

—

Provider Availability

GPT-4o mini is available from Azure. Grok-2 is available from xAI. The availability of providers can affect quality of the model and reliability.

GPT-4o mini

azure logo
Azure
Input Price:Input: $0.15/1MOutput Price:Output: $0.60/1M

Grok-2

xai logo
xAI
Input Price:Input: $2.00/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Less expensive input tokens
Less expensive output tokens
xAI
Higher GPQA score (56.0% vs 40.2%)
Higher HumanEval score (88.4% vs 87.2%)
Higher MATH score (76.1% vs 70.2%)
Higher MathVista score (69.0% vs 56.7%)
Higher MMLU score (87.5% vs 82.0%)
Higher MMMU score (66.1% vs 59.4%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-4o mini
xAI
Grok-2