Model Comparison

GPT-4 vs Grok-2

Grok-2 significantly outperforms across most benchmarks. Grok-2 is 9.4x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

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

Grok-2 significantly outperforms across most benchmarks.

Mon May 25 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Grok-2 costs less

For input processing, GPT-4 ($30.00/1M tokens) is 15.0x more expensive than Grok-2 ($2.00/1M tokens).

For output processing, GPT-4 ($60.00/1M tokens) is 6.0x more expensive than Grok-2 ($10.00/1M tokens).

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

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

Lowest available price from all providers
Mon May 25 2026 • llm-stats.com
OpenAI
GPT-4
Input tokens$30.00
Output tokens$60.00
Best providerAzure
xAI
Grok-2
Input tokens$2.00
Output tokens$10.00
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Grok-2 accepts 128,000 input tokens compared to GPT-4's 32,768 tokens. GPT-4 can generate longer responses up to 32,768 tokens, while Grok-2 is limited to 8,000 tokens.

OpenAI
GPT-4
Input32,768 tokens
Output32,768 tokens
xAI
Grok-2
Input128,000 tokens
Output8,000 tokens
Mon May 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

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

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

GPT-4

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-4

Proprietary

Closed source

Grok-2

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-4 was released on 2023-06-13, while Grok-2 was released on 2024-08-13.

Grok-2 is 14 months newer than GPT-4.

GPT-4

Jun 13, 2023

3.0 years ago

Grok-2

Aug 13, 2024

1.8 years ago

1.2yr newer

Knowledge Cutoff

When training data ends

GPT-4 has a documented knowledge cutoff of 2022-12-31, while Grok-2's cutoff date is not specified.

We can confirm GPT-4's training data extends to 2022-12-31, but cannot make a direct comparison without Grok-2's cutoff date.

GPT-4

Dec 2022

Grok-2

—

Provider Availability

GPT-4 is available from Azure, OpenAI. Grok-2 is available from xAI.

GPT-4

azure logo
Azure
Input Price:Input: $30.00/1MOutput Price:Output: $60.00/1M
openai logo
OpenAI
Input Price:Input: $30.00/1MOutput Price:Output: $60.00/1M

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

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

xAI
Larger context window (128,000 tokens)
Less expensive input tokens
Less expensive output tokens
Higher GPQA score (56.0% vs 35.7%)
Higher HumanEval score (88.4% vs 67.0%)
Higher MATH score (76.1% vs 42.0%)
Higher MMLU score (87.5% vs 86.4%)

Detailed Comparison

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

FAQ

Common questions about GPT-4 vs Grok-2.

Which is better, GPT-4 or Grok-2?

Grok-2 significantly outperforms across most benchmarks. GPT-4 is made by OpenAI and Grok-2 is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-4 compare to Grok-2 in benchmarks?

GPT-4 scores AI2 Reasoning Challenge (ARC): 96.3%, HellaSwag: 95.3%, Uniform Bar Exam: 90.0%, SAT Math: 89.0%, LSAT: 88.0%. Grok-2 scores DocVQA: 93.6%, HumanEval: 88.4%, MMLU: 87.5%, MATH: 76.1%, MMLU-Pro: 75.5%.

Is GPT-4 cheaper than Grok-2?

Grok-2 is 15.0x cheaper for input tokens. GPT-4 costs $30.00/M input and $60.00/M output via azure. Grok-2 costs $2.00/M input and $10.00/M output via xai.

What are the context window sizes for GPT-4 and Grok-2?

GPT-4 supports 33K tokens and Grok-2 supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-4 and Grok-2?

Key differences include context window (33K vs 128K), input pricing ($30.00 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-4 and Grok-2?

GPT-4 is developed by OpenAI and Grok-2 is developed by xAI.