# Grok 4.20 Multi-Agent vs Grok 4.6

> Grok 4.6 is the stronger model overall, scoring 56.8 to 45.5 on the Noometry Index. Grok 4.20 Multi-Agent costs 1.9× less per token, which makes it the better buy when Grok 4.6's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/grok-4-20-multi-agent-vs-grok-4-6
- Last updated: 2026-10-10
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. Grok 4.20 Multi-Agent scores higher in 2 categories and Grok 4.6 in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in math, where Grok 4.6 leads 66.8 to 36.6.
- The biggest single-benchmark swing is NYT Connections (extended): 89.6% for Grok 4.20 Multi-Agent and 80% for Grok 4.6.
- Grok 4.20 Multi-Agent is cheaper at $1.25 / $2.50 per million input/output tokens, against $2 / $6 for Grok 4.6.
- Grok 4.20 Multi-Agent accepts more context: 1M tokens versus 500K.

## Snapshot

| | Grok 4.20 Multi-Agent | Grok 4.6 |
|---|---|---|
| Provider | xAI | xAI |
| Noometry Index | 45.5 | 56.8 |
| Rank | 62 | 19 |
| Context | 1M | 500K |
| Input $/M | $1.25 | $2 |
| Output $/M | $2.50 | $6 |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 4.20 Multi-Agent: 42.4 (#91)
- Grok 4.6: 58.0 (#14)

| Benchmark | Grok 4.20 Multi-Agent | Grok 4.6 |
|---|---|---|
| LMArena Coding | 1458 | 1464 |
| DeepSWE | — | 67.5% |
| FrontierCode | — | 48% |
| CursorBench | — | 41.4% |
| LMArena WebDev | — | 1620 |
| FrontierSWE | — | 25.3% |
| SciCode | — | 56.5% |
| WeirdML | — | 67.3% |
| ALE-Bench | — | 1,508 |

## Agentic & Tool Use

- Grok 4.20 Multi-Agent: —
- Grok 4.6: 39.4 (#25)

| Benchmark | Grok 4.20 Multi-Agent | Grok 4.6 |
|---|---|---|
| APEX-Agents | — | 65.3% |
| GDP.pdf | — | 17.2% |
| LMArena Search | 1204 | — |
| Vending-Bench 2 | — | 9,047 |

## Reasoning

- Grok 4.20 Multi-Agent: 42.4 (#44)
- Grok 4.6: 61.3 (#18)

| Benchmark | Grok 4.20 Multi-Agent | Grok 4.6 |
|---|---|---|
| NYT Connections (extended) | 89.6% | 80% |
| LMArena Hard Prompts | 1448 | 1445 |
| ARC-AGI-2 | — | 67.1% |
| SimpleBench | — | 75.9% |
| ARC-AGI-1 | — | 87.5% |
| CritPt | — | 19.7% |
| Chess Puzzles | — | 40% |
| EBR-Bench | — | 30.5% |
| Mystery Game Puzzles | — | 34% |
| DTBench | — | 97.3% |
| LMCA | — | 48.5% |
| Epoch Capabilities Index | — | 156.48 |

## Math

- Grok 4.20 Multi-Agent: 36.6 (#106)
- Grok 4.6: 66.8 (#19)

| Benchmark | Grok 4.20 Multi-Agent | Grok 4.6 |
|---|---|---|
| LMArena Math | 1441 | 1416 |
| FrontierMath (Tiers 1-3) | — | 66% |
| FrontierMath Tier 4 | — | 31.7% |
| OTIS Mock AIME 2024-2025 | — | 99.2% |
| ProofBench | — | 51% |

## Knowledge

- Grok 4.20 Multi-Agent: 39.7 (#116)
- Grok 4.6: 63.3 (#18)

| Benchmark | Grok 4.20 Multi-Agent | Grok 4.6 |
|---|---|---|
| LMArena Expert | 1445 | 1463 |
| GPQA Diamond | — | 94% |
| SimpleQA Verified | — | 49.3% |

## Multimodal

- Grok 4.20 Multi-Agent: 39.8 (#44)
- Grok 4.6: 43.9 (#18)

| Benchmark | Grok 4.20 Multi-Agent | Grok 4.6 |
|---|---|---|
| LMArena Vision | 1259 | 1265 |
| Blueprint-Bench 2 | — | 33.2% |
| Furniture Assembly | — | 40% |
| LMArena Document | — | 1452 |

## Multilingual

- Grok 4.20 Multi-Agent: 54.6 (#40)
- Grok 4.6: 53.3 (#67)

| Benchmark | Grok 4.20 Multi-Agent | Grok 4.6 |
|---|---|---|
| LMArena Non-English | 1440 | 1422 |
| LMArena Chinese | 1475 | 1479 |
| LMArena French | 1467 | 1458 |
| LMArena German | 1456 | 1425 |
| LMArena Japanese | 1405 | 1383 |
| LMArena Korean | 1416 | 1395 |
| LMArena Russian | 1457 | 1427 |
| LMArena Spanish | 1447 | 1408 |

## Instruction Following

- Grok 4.20 Multi-Agent: 75.0 (#80)
- Grok 4.6: 75.6 (#59)

| Benchmark | Grok 4.20 Multi-Agent | Grok 4.6 |
|---|---|---|
| LMArena Instruction Following | 1420 | 1431 |

## Long Context

- Grok 4.20 Multi-Agent: 43.7 (#84)
- Grok 4.6: 44.4 (#62)

| Benchmark | Grok 4.20 Multi-Agent | Grok 4.6 |
|---|---|---|
| LMArena Longer Query | 1430 | 1453 |

## Writing & Preference

- Grok 4.20 Multi-Agent: 64.1 (#57)
- Grok 4.6: 62.5 (#77)

| Benchmark | Grok 4.20 Multi-Agent | Grok 4.6 |
|---|---|---|
| LMArena Text | 1450 | 1427 |
| LMArena Creative Writing | 1435 | 1430 |
| LMArena Multi-Turn | 1451 | 1422 |

## FAQ

### Is Grok 4.20 Multi-Agent better than Grok 4.6?

Grok 4.6 is the stronger model overall, scoring 56.8 to 45.5 on the Noometry Index. Grok 4.20 Multi-Agent costs 1.9× less per token, which makes it the better buy when Grok 4.6's lead doesn't matter for your workload.

### Which is cheaper, Grok 4.20 Multi-Agent or Grok 4.6?

Grok 4.20 Multi-Agent is cheaper. It lists at $1.25 per million input tokens and $2.50 per million output tokens; Grok 4.6 lists at $2 and $6.

### Is Grok 4.20 Multi-Agent or Grok 4.6 better for coding?

Grok 4.6 scores higher on coding benchmarks: 58.0 versus 42.4 in the Noometry coding category.

### Which has the bigger context window?

Grok 4.20 Multi-Agent does, with 1M tokens against 500K.

### How many benchmarks do Grok 4.20 Multi-Agent and Grok 4.6 share?

19 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Grok 4.6 has 49.