Model comparison
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.
Last verified . 19 shared benchmarks.
Arcee AISummary
- 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.
Side by side
| Grok 4 Fast | Trinity Large Thinking | |
|---|---|---|
| Provider | xAI | Arcee AI |
| Noometry Index | 39.4 | 38.6 |
| Released | 2025-09-19 | 2026-04-01 |
| Weights | Proprietary | Open |
| Context window | — | 262K |
| Max output | — | 80K |
| Input $ / M tokens | — | $0.25 |
| Output $ / M tokens | — | $0.80 |
| Results tracked | 30 | 24 |
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Category by category
Coding Trinity Large Thinking leads
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 Not comparable
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 leads
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 leads
Grok 4 Fast: 38.9 (#123), Trinity Large Thinking: 37.6 (#149)
| Benchmark | Grok 4 Fast | Trinity Large Thinking |
|---|---|---|
| LMArena Math | 1419 | 1366 |
Knowledge Trinity Large Thinking leads
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 leads
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 leads
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 leads
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 leads
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 |
Frequently asked questions
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.