Model Comparison

GPT-4.1 vs Grok-1.5V

GPT-4.1 significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GPT-4.1 outperforms in 2 benchmarks (MathVista, MMMU), while Grok-1.5V is better at 0 benchmarks.

GPT-4.1 significantly outperforms across most benchmarks.

Thu May 14 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT-4.1 specifies input context (1,047,576 tokens). Only GPT-4.1 specifies output context (32,768 tokens).

OpenAI
GPT-4.1
Input1,047,576 tokens
Output32,768 tokens
xAI
Grok-1.5V
Input- tokens
Output- tokens
Thu May 14 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-4.1 and Grok-1.5V support multimodal inputs.

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

GPT-4.1

Text
Images
Audio
Video

Grok-1.5V

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-4.1

Proprietary

Closed source

Grok-1.5V

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-4.1 was released on 2025-04-14, while Grok-1.5V was released on 2024-04-12.

GPT-4.1 is 12 months newer than Grok-1.5V.

GPT-4.1

Apr 14, 2025

1.1 years ago

1.0yr newer
Grok-1.5V

Apr 12, 2024

2.1 years ago

Knowledge Cutoff

When training data ends

GPT-4.1 has a documented knowledge cutoff of 2024-06-01, while Grok-1.5V's cutoff date is not specified.

We can confirm GPT-4.1's training data extends to 2024-06-01, but cannot make a direct comparison without Grok-1.5V's cutoff date.

GPT-4.1

Jun 2024

Grok-1.5V

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Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (1,047,576 tokens)
Higher MathVista score (72.2% vs 52.8%)
Higher MMMU score (74.8% vs 53.6%)
xAI

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

OpenAIGPT-4.1
xAIGrok-1.5V
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-4.1
xAI
Grok-1.5V

FAQ

Common questions about GPT-4.1 vs Grok-1.5V.

Which is better, GPT-4.1 or Grok-1.5V?

GPT-4.1 significantly outperforms across most benchmarks. GPT-4.1 is made by OpenAI and Grok-1.5V is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-4.1 compare to Grok-1.5V in benchmarks?

GPT-4.1 scores MMLU: 90.2%, CharXiv-D: 87.9%, IFEval: 87.4%, MMMLU: 87.3%, MMMU: 74.8%. Grok-1.5V scores AI2D: 88.3%, DocVQA: 85.6%, TextVQA: 78.1%, ChartQA: 76.1%, RealWorldQA: 68.7%.

What are the context window sizes for GPT-4.1 and Grok-1.5V?

GPT-4.1 supports 1.0M tokens and Grok-1.5V supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Who makes GPT-4.1 and Grok-1.5V?

GPT-4.1 is developed by OpenAI and Grok-1.5V is developed by xAI.