Grok-3 vs Grok-4 Heavy: Specs & Benchmark Comparison
| Characteristic | Grok-3 | Grok-4 Heavy |
|---|---|---|
| Company | xAI | xAI |
| Release Date | February 16, 2025 | July 8, 2025 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 128K | — |
| Context (output) | 8K | — |
| Input Price / 1M | $3.00 | — |
| Output Price / 1M | $15.00 | — |
| Average Score | 0.8 | 0.8 |
| Benchmarks | ||
| GPQA | 0.8 | 0.9 |
| LiveCodeBench | 0.8 | 0.8 |
Visual Benchmark Comparison
Grok-3
Grok-4 Heavy
GPQA0.8 vs 0.9
0.8
0.9
LiveCodeBench0.8 vs 0.8
0.8
0.8
Verdict
Grok-4 Heavy leads in 1 out of 2 comparison categories.
Overall Performance
Both models show comparable average scores: Grok-3 — 0.8, Grok-4 Heavy — 0.8.
Recency
Grok-4 Heavy is newer: released 7/8/2025 vs 2/16/2025.
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Frequently Asked Questions
Which is better for coding — Grok-3 or Grok-4 Heavy?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — Grok-3 or Grok-4 Heavy?
API pricing data is available on the individual model pages.
Which has a larger context window — Grok-3 or Grok-4 Heavy?
Context window data is available on the individual model pages.
The Grok-3 and Grok-4 Heavy comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Grok-3 or Grok-4 Heavy page. See also the complete list of AI model comparisons.