GPT-4 vs Grok-4 Heavy
Grok-4 Heavy leads the LLM Stats Score 40.7 to 3.0.
OpenAI · xAI · Updated for 2026
Which is better?
Grok-4 Heavy leads the overall LLM Stats Score 40.7 to 3.0, ranking #59 overall.
In the 1 individual benchmarks reported for both models, Grok-4 Heavy wins 1; 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
- you want predictable pricing at $30.00/M input and $60.00/M output
Choose Grok-4 Heavy
- overall performance matters — it scores 40.7 and ranks #59 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
12 reported for GPT-4 · 6 for Grok-4 Heavy
GPT-4 outperforms in 0 benchmarks, while Grok-4 Heavy is better at 1 benchmark (GPQA).
Grok-4 Heavy 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 specifies input context (32,768 tokens). Only GPT-4 specifies output context (32,768 tokens).
Input capabilities
Documented input modalities across available providers
Both GPT-4 and Grok-4 Heavy support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-4
Grok-4 Heavy
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 was released on 2023-06-13, while Grok-4 Heavy's release date is not specified.
We can confirm GPT-4's release timeline, but cannot make a direct age comparison without Grok-4 Heavy's release date.
Jun 13, 2023
3.3 years ago
—
Knowledge Cutoff
When training data ends
GPT-4 has a knowledge cutoff of 2022-12-31, while Grok-4 Heavy has a cutoff of 2024-12-31.
Grok-4 Heavy has more recent training data (up to 2024-12-31), making it potentially better informed about events through that date compared to GPT-4 (2022-12-31).
Dec 2022
Dec 2024
2 yr newerOutputs Comparison
Judge for yourself.
Run your own prompts against GPT-4 and Grok-4 Heavy side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-4 vs Grok-4 Heavy.