# Grok 4.20 Multi-Agent vs Qwen3 8B

> Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 33.3 on the Noometry Index. Qwen3 8B costs 5.0× 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-qwen3-8b
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 42.4 to 16.1.
- Qwen3 8B is cheaper at $0.18 / $0.70 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 131K.
- Qwen3 8B has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.20 Multi-Agent | Qwen3 8B |
|---|---|---|
| Provider | xAI | Alibaba (Qwen) |
| Noometry Index | 45.5 | 33.3 |
| Rank | 62 | 237 |
| Context | 1M | 131K |
| Input $/M | $1.25 | $0.18 |
| Output $/M | $2.50 | $0.70 |
| Weights | Proprietary | Open |

## Coding

- Grok 4.20 Multi-Agent: 42.4 (#91)
- Qwen3 8B: 33.4 (#245)

| Benchmark | Grok 4.20 Multi-Agent | Qwen3 8B |
|---|---|---|
| SciCode | — | 22.6% |
| LMArena Coding | 1458 | — |

## Agentic & Tool Use

- Grok 4.20 Multi-Agent: —
- Qwen3 8B: 29.9 (#71)

| Benchmark | Grok 4.20 Multi-Agent | Qwen3 8B |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 42.6% |
| LMArena Search | 1204 | — |

## Reasoning

- Grok 4.20 Multi-Agent: 42.4 (#44)
- Qwen3 8B: 16.1 (#299)

| Benchmark | Grok 4.20 Multi-Agent | Qwen3 8B |
|---|---|---|
| NYT Connections (extended) | 89.6% | — |
| CritPt | — | 0% |
| Chess Puzzles | — | 5% |
| LMArena Hard Prompts | 1448 | — |
| DTBench | — | 59.7% |
| LMCA | — | 8.8% |
| Epoch Capabilities Index | — | 136.17 |

## Math

- Grok 4.20 Multi-Agent: 36.6 (#106)
- Qwen3 8B: 33.3 (#176)

| Benchmark | Grok 4.20 Multi-Agent | Qwen3 8B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 56.1% |
| LMArena Math | 1441 | — |

## Knowledge

- Grok 4.20 Multi-Agent: 39.7 (#116)
- Qwen3 8B: 36.1 (#164)

| Benchmark | Grok 4.20 Multi-Agent | Qwen3 8B |
|---|---|---|
| GPQA Diamond | — | 56.8% |
| Vectara Hallucination Rate | — | 4.8% |
| LMArena Expert | 1445 | — |

## Multimodal

- Grok 4.20 Multi-Agent: 39.8 (#44)
- Qwen3 8B: —

| Benchmark | Grok 4.20 Multi-Agent | Qwen3 8B |
|---|---|---|
| LMArena Vision | 1259 | — |

## Multilingual

- Grok 4.20 Multi-Agent: 54.6 (#40)
- Qwen3 8B: —

| Benchmark | Grok 4.20 Multi-Agent | Qwen3 8B |
|---|---|---|
| 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

- Grok 4.20 Multi-Agent: 75.0 (#80)
- Qwen3 8B: —

| Benchmark | Grok 4.20 Multi-Agent | Qwen3 8B |
|---|---|---|
| LMArena Instruction Following | 1420 | — |

## Long Context

- Grok 4.20 Multi-Agent: 43.7 (#84)
- Qwen3 8B: 37.8 (#205)

| Benchmark | Grok 4.20 Multi-Agent | Qwen3 8B |
|---|---|---|
| Fiction.LiveBench | — | 62.1% |
| LMArena Longer Query | 1430 | — |

## Writing & Preference

- Grok 4.20 Multi-Agent: 64.1 (#57)
- Qwen3 8B: —

| Benchmark | Grok 4.20 Multi-Agent | Qwen3 8B |
|---|---|---|
| LMArena Text | 1450 | — |
| LMArena Creative Writing | 1435 | — |
| LMArena Multi-Turn | 1451 | — |

## FAQ

### Is Grok 4.20 Multi-Agent better than Qwen3 8B?

Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 33.3 on the Noometry Index. Qwen3 8B costs 5.0× 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 Qwen3 8B?

Qwen3 8B is cheaper. It lists at $0.18 per million input tokens and $0.70 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.

### Is Grok 4.20 Multi-Agent or Qwen3 8B better for coding?

Grok 4.20 Multi-Agent scores higher on coding benchmarks: 42.4 versus 33.4 in the Noometry coding category.

### Which has the bigger context window?

Grok 4.20 Multi-Agent does, with 1M tokens against 131K.

### How many benchmarks do Grok 4.20 Multi-Agent and Qwen3 8B share?

0 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Qwen3 8B has 11.