# GPT-5.2 Pro vs Grok 4 Heavy

> GPT-5.2 Pro has enough public results to be ranked (#34); Grok 4 Heavy does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/gpt-5-2-pro-vs-grok-4-heavy
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both.

## Snapshot

| | GPT-5.2 Pro | Grok 4 Heavy |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 52.2 | — |
| Rank | 34 | — |
| Context | 400K | — |
| Input $/M | $21 | — |
| Output $/M | $168 | — |
| Weights | Proprietary | Proprietary |

## Reasoning

- GPT-5.2 Pro: 51.8 (#31)
- Grok 4 Heavy: —

| Benchmark | GPT-5.2 Pro | Grok 4 Heavy |
|---|---|---|
| ARC-AGI-2 | 54.2% | — |
| SimpleBench | 57.4% | — |
| NYT Connections (extended) | 79.3% | — |
| ARC-AGI-1 | 90.5% | — |
| Epoch Capabilities Index | 155.41 | — |

## Math

- GPT-5.2 Pro: 64.8 (#23)
- Grok 4 Heavy: —

| Benchmark | GPT-5.2 Pro | Grok 4 Heavy |
|---|---|---|
| FrontierMath Tier 4 (v1) | 31.3% | 2.1% |
| FrontierMath (Tiers 1-3) | 74% | — |
| FrontierMath Tier 4 | 46% | — |

## FAQ

### Is GPT-5.2 Pro better than Grok 4 Heavy?

GPT-5.2 Pro has enough public results to be ranked (#34); Grok 4 Heavy does not yet, so treat this comparison as directional.

### How many benchmarks do GPT-5.2 Pro and Grok 4 Heavy share?

1 benchmark has published results for both models. GPT-5.2 Pro has 8 scored results on Noometry and Grok 4 Heavy has 1.