# Grok 4.20 Multi-Agent vs Nemotron 3.5 Lightning

> Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 40.0 on the Noometry Index. Nemotron 3.5 Lightning costs 18× less per token, which makes it the better buy when Grok 4.20 Multi-Agent's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/grok-4-20-multi-agent-vs-nemotron-3-5-lightning
- Last updated: 2026-10-12
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Grok 4.20 Multi-Agent scores higher in 8 categories and Nemotron 3.5 Lightning in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 43.9 to 26.8.
- Nemotron 3.5 Lightning is cheaper at $0.05 / $0.20 per million input/output tokens, against $1.25 / $2.50 for Grok 4.20 Multi-Agent.
- Grok 4.20 Multi-Agent accepts more context: 1M tokens versus 262K.
- Nemotron 3.5 Lightning has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.20 Multi-Agent | Nemotron 3.5 Lightning |
|---|---|---|
| Provider | xAI | NVIDIA |
| Noometry Index | 46.2 | 40.0 |
| Rank | 65 | 155 |
| Context | 1M | 262K |
| Input $/M | $1.25 | $0.05 |
| Output $/M | $2.50 | $0.20 |
| Weights | Proprietary | Open |

## Coding

- Grok 4.20 Multi-Agent: 43.0 (#92)
- Nemotron 3.5 Lightning: 40.4 (#141)

| Benchmark | Grok 4.20 Multi-Agent | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Coding | 1457 | 1375 |

## Agentic & Tool Use

- Grok 4.20 Multi-Agent: —
- Nemotron 3.5 Lightning: —

| Benchmark | Grok 4.20 Multi-Agent | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Search | 1204 | — |

## Reasoning

- Grok 4.20 Multi-Agent: 43.9 (#48)
- Nemotron 3.5 Lightning: 26.8 (#127)

| Benchmark | Grok 4.20 Multi-Agent | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Hard Prompts | 1448 | 1337 |
| NYT Connections (extended) | 89.6% | — |

## Math

- Grok 4.20 Multi-Agent: 39.4 (#104)
- Nemotron 3.5 Lightning: 37.5 (#155)

| Benchmark | Grok 4.20 Multi-Agent | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Math | 1442 | 1359 |

## Knowledge

- Grok 4.20 Multi-Agent: 40.4 (#119)
- Nemotron 3.5 Lightning: 37.5 (#154)

| Benchmark | Grok 4.20 Multi-Agent | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Expert | 1445 | 1356 |

## Multimodal

- Grok 4.20 Multi-Agent: 40.5 (#48)
- Nemotron 3.5 Lightning: —

| Benchmark | Grok 4.20 Multi-Agent | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Vision | 1259 | — |

## Multilingual

- Grok 4.20 Multi-Agent: 54.4 (#43)
- Nemotron 3.5 Lightning: 44.0 (#180)

| Benchmark | Grok 4.20 Multi-Agent | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Non-English | 1440 | 1295 |
| LMArena Chinese | 1475 | 1359 |
| LMArena French | 1466 | 1366 |
| LMArena German | 1456 | 1282 |
| LMArena Japanese | 1405 | 1206 |
| LMArena Korean | 1416 | 1238 |
| LMArena Russian | 1457 | 1253 |
| LMArena Spanish | 1447 | 1345 |

## Instruction Following

- Grok 4.20 Multi-Agent: 74.8 (#84)
- Nemotron 3.5 Lightning: 69.6 (#170)

| Benchmark | Grok 4.20 Multi-Agent | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Instruction Following | 1420 | 1318 |

## Long Context

- Grok 4.20 Multi-Agent: 43.7 (#88)
- Nemotron 3.5 Lightning: 39.9 (#165)

| Benchmark | Grok 4.20 Multi-Agent | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Longer Query | 1431 | 1314 |

## Writing & Preference

- Grok 4.20 Multi-Agent: 64.0 (#59)
- Nemotron 3.5 Lightning: 48.5 (#201)

| Benchmark | Grok 4.20 Multi-Agent | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Text | 1450 | 1327 |
| LMArena Creative Writing | 1436 | 1254 |
| LMArena Multi-Turn | 1452 | 1328 |
| EQ-Bench Creative Writing | — | 1280 |

## FAQ

### Is Grok 4.20 Multi-Agent better than Nemotron 3.5 Lightning?

Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 40.0 on the Noometry Index. Nemotron 3.5 Lightning costs 18× less per token, which makes it the better buy when Grok 4.20 Multi-Agent's lead doesn't matter for your workload.

### Which is cheaper, Grok 4.20 Multi-Agent or Nemotron 3.5 Lightning?

Nemotron 3.5 Lightning is cheaper. It lists at $0.05 per million input tokens and $0.20 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.

### Is Grok 4.20 Multi-Agent or Nemotron 3.5 Lightning better for coding?

Grok 4.20 Multi-Agent scores higher on coding benchmarks: 43.0 versus 40.4 in the Noometry coding category.

### Which has the bigger context window?

Grok 4.20 Multi-Agent does, with 1M tokens against 262K.

### How many benchmarks do Grok 4.20 Multi-Agent and Nemotron 3.5 Lightning share?

17 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Nemotron 3.5 Lightning has 18.