# Grok 4 Fast vs Trinity Large Thinking

> Grok 4 Fast and Trinity Large Thinking score almost the same on the Noometry Index (39.4 vs 38.6), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/grok-4-fast-vs-trinity-large-thinking
- Last updated: 2026-10-10
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. Grok 4 Fast scores higher in 6 categories and Trinity Large Thinking in 2 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 41.3.
- The biggest single-benchmark swing is Vectara Hallucination Rate: 19.7% for Grok 4 Fast and 6.9% for Trinity Large Thinking.
- Trinity Large Thinking has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4 Fast | Trinity Large Thinking |
|---|---|---|
| Provider | xAI | Arcee AI |
| Noometry Index | 39.4 | 38.6 |
| Rank | 167 | 185 |
| Context | — | 262K |
| Input $/M | — | $0.25 |
| Output $/M | — | $0.80 |
| Weights | Proprietary | Open |

## Coding

- Grok 4 Fast: 32.5 (#271)
- Trinity Large Thinking: 34.1 (#244)

| Benchmark | Grok 4 Fast | Trinity Large Thinking |
|---|---|---|
| LMArena WebDev | 1159 | 1238 |
| LMArena Coding | 1429 | 1381 |
| SciCode | — | 36.1% |
| WeirdML | 42.9% | — |

## Agentic & Tool Use

- Grok 4 Fast: 29.5 (#86)
- Trinity Large Thinking: —

| Benchmark | Grok 4 Fast | Trinity Large Thinking |
|---|---|---|
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| LMArena Search | 1171 | — |

## Reasoning

- Grok 4 Fast: 22.2 (#201)
- Trinity Large Thinking: 16.9 (#298)

| Benchmark | Grok 4 Fast | Trinity Large Thinking |
|---|---|---|
| LMArena Hard Prompts | 1412 | 1350 |
| ARC-AGI-2 | 5.3% | — |
| Kagi LLM Benchmark | 66.1% | — |
| NYT Connections (extended) | — | 16.5% |
| ARC-AGI-1 | 48.5% | — |
| CritPt | — | 0.9% |
| Thematic Generalization | — | 41.6% |
| DTBench | 82.7% | — |
| Surface Evolver Bench | — | 15.6% |
| Epoch Capabilities Index | 144.2 | — |
| ForecastBench | 60.5 | — |

## Math

- Grok 4 Fast: 38.9 (#123)
- Trinity Large Thinking: 37.6 (#149)

| Benchmark | Grok 4 Fast | Trinity Large Thinking |
|---|---|---|
| LMArena Math | 1419 | 1366 |

## Knowledge

- Grok 4 Fast: 32.0 (#214)
- Trinity Large Thinking: 40.9 (#113)

| Benchmark | Grok 4 Fast | Trinity Large Thinking |
|---|---|---|
| Vectara Hallucination Rate | 19.7% | 6.9% |
| LMArena Expert | 1411 | 1360 |

## Multilingual

- Grok 4 Fast: 51.3 (#111)
- Trinity Large Thinking: 46.2 (#160)

| Benchmark | Grok 4 Fast | Trinity Large Thinking |
|---|---|---|
| LMArena Non-English | 1396 | 1325 |
| LMArena Chinese | 1457 | 1373 |
| LMArena French | 1431 | 1374 |
| LMArena German | 1383 | 1356 |
| LMArena Japanese | 1352 | 1311 |
| LMArena Korean | 1357 | 1306 |
| LMArena Russian | 1389 | 1337 |
| LMArena Spanish | 1415 | 1357 |

## Instruction Following

- Grok 4 Fast: 73.2 (#121)
- Trinity Large Thinking: 70.5 (#162)

| Benchmark | Grok 4 Fast | Trinity Large Thinking |
|---|---|---|
| LMArena Instruction Following | 1387 | 1334 |

## Long Context

- Grok 4 Fast: 63.2 (#3)
- Trinity Large Thinking: 41.3 (#144)

| Benchmark | Grok 4 Fast | Trinity Large Thinking |
|---|---|---|
| LMArena Longer Query | 1415 | 1355 |
| Fiction.LiveBench | 94.4% | — |

## Writing & Preference

- Grok 4 Fast: 60.0 (#102)
- Trinity Large Thinking: 53.8 (#158)

| Benchmark | Grok 4 Fast | Trinity Large Thinking |
|---|---|---|
| LMArena Text | 1407 | 1340 |
| LMArena Creative Writing | 1387 | 1320 |
| LMArena Multi-Turn | 1414 | 1342 |

## FAQ

### Is Grok 4 Fast better than Trinity Large Thinking?

Grok 4 Fast and Trinity Large Thinking score almost the same on the Noometry Index (39.4 vs 38.6), so choose on price, context window or the category you care about most.

### Is Grok 4 Fast or Trinity Large Thinking better for coding?

Trinity Large Thinking scores higher on coding benchmarks: 34.1 versus 32.5 in the Noometry coding category.

### How many benchmarks do Grok 4 Fast and Trinity Large Thinking share?

19 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Trinity Large Thinking has 24.