Model Comparison

Grok-1.5 vs GPT-4

Grok-1.5 shows notably better performance in the majority of benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Grok-1.5 outperforms in 3 benchmarks (GPQA, HumanEval, MATH), while GPT-4 is better at 1 benchmark (MMLU).

Grok-1.5 shows notably better performance in the majority of benchmarks.

Thu Apr 16 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Cost data unavailable.

Lowest available price from all providers
Thu Apr 16 2026 • llm-stats.com
xAI
Grok-1.5
Input tokens$0.00
Output tokens$0.00
Best providerUnknown Organization
OpenAI
GPT-4
Input tokens$30.00
Output tokens$60.00
Best providerAzure
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Only GPT-4 specifies input context (32,768 tokens). Only GPT-4 specifies output context (32,768 tokens).

xAI
Grok-1.5
Input- tokens
Output- tokens
OpenAI
GPT-4
Input32,768 tokens
Output32,768 tokens
Thu Apr 16 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-4 supports multimodal inputs, whereas Grok-1.5 does not.

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

Grok-1.5

Text
Images
Audio
Video

GPT-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.

Grok-1.5

Proprietary

Closed source

GPT-4

Proprietary

Closed source

Release Timeline

When each model was launched

Grok-1.5 was released on 2024-03-28, while GPT-4 was released on 2023-06-13.

Grok-1.5 is 10 months newer than GPT-4.

Grok-1.5

Mar 28, 2024

2.1 years ago

9mo newer
GPT-4

Jun 13, 2023

2.8 years ago

Knowledge Cutoff

When training data ends

GPT-4 has a documented knowledge cutoff of 2022-12-31, while Grok-1.5'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-1.5's cutoff date.

Grok-1.5

—

GPT-4

Dec 2022

Outputs Comparison

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Key Takeaways

xAI
Higher GPQA score (35.9% vs 35.7%)
Higher HumanEval score (74.1% vs 67.0%)
Higher MATH score (50.6% vs 42.0%)
OpenAI
Larger context window (32,768 tokens)
Supports multimodal inputs
Higher MMLU score (86.4% vs 81.3%)

Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok-1.5
OpenAI
GPT-4

FAQ

Common questions about Grok-1.5 vs GPT-4

Grok-1.5 shows notably better performance in the majority of benchmarks. Grok-1.5 is made by xAI and GPT-4 is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Grok-1.5 scores GSM8k: 90.0%, DocVQA: 85.6%, MMLU: 81.3%, HumanEval: 74.1%, MMMU: 53.6%. 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-1.5 supports an unknown number of tokens and GPT-4 supports 33K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.
Grok-1.5 is developed by xAI and GPT-4 is developed by OpenAI.