Model Comparison

Grok-1.5 vs GPT-4 Turbo

GPT-4 Turbo significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Grok-1.5 outperforms in 0 benchmarks, while GPT-4 Turbo is better at 4 benchmarks (GPQA, HumanEval, MATH, MMLU).

GPT-4 Turbo significantly outperforms across most benchmarks.

Mon May 11 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT-4 Turbo specifies input context (128,000 tokens). Only GPT-4 Turbo specifies output context (4,096 tokens).

xAI
Grok-1.5
Input- tokens
Output- tokens
OpenAI
GPT-4 Turbo
Input128,000 tokens
Output4,096 tokens
Mon May 11 2026 • llm-stats.com

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 Turbo

Proprietary

Closed source

Release Timeline

When each model was launched

Grok-1.5 was released on 2024-03-28, while GPT-4 Turbo was released on 2024-04-09.

GPT-4 Turbo is 0 month newer than Grok-1.5.

Grok-1.5

Mar 28, 2024

2.1 years ago

GPT-4 Turbo

Apr 9, 2024

2.1 years ago

1w newer

Knowledge Cutoff

When training data ends

GPT-4 Turbo has a documented knowledge cutoff of 2023-12-31, while Grok-1.5's cutoff date is not specified.

We can confirm GPT-4 Turbo's training data extends to 2023-12-31, but cannot make a direct comparison without Grok-1.5's cutoff date.

Grok-1.5

—

GPT-4 Turbo

Dec 2023

Outputs Comparison

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Key Takeaways

xAI

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

OpenAI
Larger context window (128,000 tokens)
Higher GPQA score (48.0% vs 35.9%)
Higher HumanEval score (87.1% vs 74.1%)
Higher MATH score (72.6% vs 50.6%)
Higher MMLU score (86.5% vs 81.3%)

Detailed Comparison

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

FAQ

Common questions about Grok-1.5 vs GPT-4 Turbo.

Which is better, Grok-1.5 or GPT-4 Turbo?

GPT-4 Turbo significantly outperforms across most benchmarks. Grok-1.5 is made by xAI and GPT-4 Turbo is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Grok-1.5 compare to GPT-4 Turbo in benchmarks?

Grok-1.5 scores GSM8k: 90.0%, DocVQA: 85.6%, MMLU: 81.3%, HumanEval: 74.1%, MMMU: 53.6%. GPT-4 Turbo scores MGSM: 88.5%, HumanEval: 87.1%, MMLU: 86.5%, DROP: 86.0%, MATH: 72.6%.

What are the context window sizes for Grok-1.5 and GPT-4 Turbo?

Grok-1.5 supports an unknown number of tokens and GPT-4 Turbo supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Who makes Grok-1.5 and GPT-4 Turbo?

Grok-1.5 is developed by xAI and GPT-4 Turbo is developed by OpenAI.