Grok-1.5V vs Grok-4
Grok-4 leads the LLM Stats Score 33.7 to -0.8.
xAI · xAI · Updated for 2026
Which is better?
Grok-4 leads the overall LLM Stats Score 33.7 to -0.8, ranking #98 overall.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Grok-1.5V
- you are already invested in the xAI ecosystem
Choose Grok-4
- overall performance matters — it scores 33.7 and ranks #98 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you want the most recent training data — it shipped Jul 2025
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
7 reported for Grok-1.5V · 7 for Grok-4
Grok-1.5V and Grok-4don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only Grok-4 specifies input context (256,000 tokens). Only Grok-4 specifies output context (8,000 tokens).
Input capabilities
Documented input modalities across available providers
Both Grok-1.5V and Grok-4 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Grok-1.5V
Grok-4
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
Grok-1.5V was released on 2024-04-12, while Grok-4 was released on 2025-07-09.
Grok-4 is 15 months newer than Grok-1.5V.
Apr 12, 2024
2.4 years ago
Jul 9, 2025
1.2 years ago
1.2yr newerKnowledge Cutoff
When training data ends
Grok-4 has a documented knowledge cutoff of 2024-12-31, while Grok-1.5V's cutoff date is not specified.
We can confirm Grok-4's training data extends to 2024-12-31, but cannot make a direct comparison without Grok-1.5V's cutoff date.
—
Dec 2024
Outputs Comparison
Judge for yourself.
Run your own prompts against Grok-1.5V and Grok-4 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Grok-1.5V vs Grok-4.