GPT-4.1 vs Grok-1.5
GPT-4.1 leads the LLM Stats Score 18.0 to -2.6.
OpenAI · xAI · Updated for 2026
Which is better?
GPT-4.1 leads the overall LLM Stats Score 18.0 to -2.6, ranking #214 overall.
In the 4 individual benchmarks reported for both models, GPT-4.1 wins 4; this is a narrower head-to-head signal than the composite indexes.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-4.1
- overall performance matters — it scores 18.0 and ranks #214 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you value its reported benchmark strengths — it wins 4 of 4 exact shared results
- you want the most recent training data — it shipped Apr 2025
Choose Grok-1.5
- you are already invested in the xAI ecosystem
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
29 reported for GPT-4.1 · 9 for Grok-1.5
GPT-4.1 outperforms in 4 benchmarks (GPQA, MathVista, MMLU, MMMU), while Grok-1.5 is better at 0 benchmarks.
GPT-4.1 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
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).
Input capabilities
Documented input modalities across available providers
GPT-4.1 supports multimodal inputs, whereas Grok-1.5 does not.
GPT-4.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-4.1
Grok-1.5
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-4.1 was released on 2025-04-14, while Grok-1.5 was released on 2024-03-28.
GPT-4.1 is 13 months newer than Grok-1.5.
Apr 14, 2025
1.4 years ago
1.0yr newerMar 28, 2024
2.5 years ago
Knowledge Cutoff
When training data ends
GPT-4.1 has a documented knowledge cutoff of 2024-06-01, while Grok-1.5'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-1.5's cutoff date.
Jun 2024
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Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-4.1 and Grok-1.5 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-4.1 vs Grok-1.5.