# GPT-5.2 Pro vs Grok 4.20 Multi-Agent

> GPT-5.2 Pro is the stronger model overall, scoring 52.2 to 45.5 on the Noometry Index. Grok 4.20 Multi-Agent costs 37× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-5-2-pro-vs-grok-4-20-multi-agent
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. GPT-5.2 Pro scores higher in 2 categories and Grok 4.20 Multi-Agent in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.2 Pro leads 64.8 to 36.6.
- The biggest single-benchmark swing is NYT Connections (extended): 79.3% for GPT-5.2 Pro and 89.6% for Grok 4.20 Multi-Agent.
- Grok 4.20 Multi-Agent is cheaper at $1.25 / $2.50 per million input/output tokens, against $21 / $168 for GPT-5.2 Pro.
- Grok 4.20 Multi-Agent accepts more context: 1M tokens versus 400K.

## Snapshot

| | GPT-5.2 Pro | Grok 4.20 Multi-Agent |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 52.2 | 45.5 |
| Rank | 34 | 62 |
| Context | 400K | 1M |
| Input $/M | $21 | $1.25 |
| Output $/M | $168 | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.2 Pro: —
- Grok 4.20 Multi-Agent: 42.4 (#91)

| Benchmark | GPT-5.2 Pro | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Coding | — | 1458 |

## Agentic & Tool Use

- GPT-5.2 Pro: —
- Grok 4.20 Multi-Agent: —

| Benchmark | GPT-5.2 Pro | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Search | — | 1204 |

## Reasoning

- GPT-5.2 Pro: 51.8 (#31)
- Grok 4.20 Multi-Agent: 42.4 (#44)

| Benchmark | GPT-5.2 Pro | Grok 4.20 Multi-Agent |
|---|---|---|
| NYT Connections (extended) | 79.3% | 89.6% |
| ARC-AGI-2 | 54.2% | — |
| SimpleBench | 57.4% | — |
| ARC-AGI-1 | 90.5% | — |
| LMArena Hard Prompts | — | 1448 |
| Epoch Capabilities Index | 155.41 | — |

## Math

- GPT-5.2 Pro: 64.8 (#23)
- Grok 4.20 Multi-Agent: 36.6 (#106)

| Benchmark | GPT-5.2 Pro | Grok 4.20 Multi-Agent |
|---|---|---|
| FrontierMath (Tiers 1-3) | 74% | — |
| FrontierMath Tier 4 | 46% | — |
| LMArena Math | — | 1441 |
| FrontierMath Tier 4 (v1) | 31.3% | — |

## Knowledge

- GPT-5.2 Pro: —
- Grok 4.20 Multi-Agent: 39.7 (#116)

| Benchmark | GPT-5.2 Pro | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Expert | — | 1445 |

## Multimodal

- GPT-5.2 Pro: —
- Grok 4.20 Multi-Agent: 39.8 (#44)

| Benchmark | GPT-5.2 Pro | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Vision | — | 1259 |

## Multilingual

- GPT-5.2 Pro: —
- Grok 4.20 Multi-Agent: 54.6 (#40)

| Benchmark | GPT-5.2 Pro | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Non-English | — | 1440 |
| LMArena Chinese | — | 1475 |
| LMArena French | — | 1467 |
| LMArena German | — | 1456 |
| LMArena Japanese | — | 1405 |
| LMArena Korean | — | 1416 |
| LMArena Russian | — | 1457 |
| LMArena Spanish | — | 1447 |

## Instruction Following

- GPT-5.2 Pro: —
- Grok 4.20 Multi-Agent: 75.0 (#80)

| Benchmark | GPT-5.2 Pro | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Instruction Following | — | 1420 |

## Long Context

- GPT-5.2 Pro: —
- Grok 4.20 Multi-Agent: 43.7 (#84)

| Benchmark | GPT-5.2 Pro | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Longer Query | — | 1430 |

## Writing & Preference

- GPT-5.2 Pro: —
- Grok 4.20 Multi-Agent: 64.1 (#57)

| Benchmark | GPT-5.2 Pro | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Text | — | 1450 |
| LMArena Creative Writing | — | 1435 |
| LMArena Multi-Turn | — | 1451 |

## FAQ

### Is GPT-5.2 Pro better than Grok 4.20 Multi-Agent?

GPT-5.2 Pro is the stronger model overall, scoring 52.2 to 45.5 on the Noometry Index. Grok 4.20 Multi-Agent costs 37× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.

### Which is cheaper, GPT-5.2 Pro or Grok 4.20 Multi-Agent?

Grok 4.20 Multi-Agent is cheaper. It lists at $1.25 per million input tokens and $2.50 per million output tokens; GPT-5.2 Pro lists at $21 and $168.

### Which has the bigger context window?

Grok 4.20 Multi-Agent does, with 1M tokens against 400K.

### How many benchmarks do GPT-5.2 Pro and Grok 4.20 Multi-Agent share?

1 benchmark has published results for both models. GPT-5.2 Pro has 8 scored results on Noometry and Grok 4.20 Multi-Agent has 20.