Model comparison
Step 3.7 Flash vs Trinity Large Thinking
Trinity Large Thinking is the stronger model overall, scoring 38.6 to 37.3 on the Noometry Index.
Last verified . 3 shared benchmarks.
StepFun
Arcee AISummary
- They share 3 benchmarks with published results for both. Step 3.7 Flash scores higher in 3 categories and Trinity Large Thinking in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in coding, where Step 3.7 Flash leads 40.0 to 34.1.
- The biggest single-benchmark swing is NYT Connections (extended): 39.7% for Step 3.7 Flash and 16.5% for Trinity Large Thinking.
- Trinity Large Thinking is cheaper at $0.25 / $0.80 per million input/output tokens, against $0.18 / $1.11 for Step 3.7 Flash.
- Trinity Large Thinking accepts more context: 262K tokens versus 256K.
Side by side
| Step 3.7 Flash | Trinity Large Thinking | |
|---|---|---|
| Provider | StepFun | Arcee AI |
| Noometry Index | 37.3 | 38.6 |
| Released | 2026-05-29 | 2026-04-01 |
| Weights | Open | Open |
| Context window | 256K | 262K |
| Max output | 256K | 80K |
| Input $ / M tokens | $0.18 | $0.25 |
| Output $ / M tokens | $1.11 | $0.80 |
| Results tracked | 5 | 24 |
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Category by category
Coding Step 3.7 Flash leads
Step 3.7 Flash: 40.0 (#150), Trinity Large Thinking: 34.1 (#244)
| Benchmark | Step 3.7 Flash | Trinity Large Thinking |
|---|---|---|
| SciCode | 40% | 36.1% |
| LMArena WebDev | — | 1238 |
| LMArena Coding | — | 1381 |
| ALE-Bench | 694.12 | — |
Reasoning Step 3.7 Flash leads
Step 3.7 Flash: 21.6 (#219), Trinity Large Thinking: 16.9 (#298)
| Benchmark | Step 3.7 Flash | Trinity Large Thinking |
|---|---|---|
| NYT Connections (extended) | 39.7% | 16.5% |
| CritPt | 2.3% | 0.9% |
| Thematic Generalization | — | 41.6% |
| LMArena Hard Prompts | — | 1350 |
| Surface Evolver Bench | — | 15.6% |
Math Step 3.7 Flash leads
Step 3.7 Flash: 42.9 (#82), Trinity Large Thinking: 37.6 (#149)
| Benchmark | Step 3.7 Flash | Trinity Large Thinking |
|---|---|---|
| MathArena Final-Answer Competitions | 68.5% | — |
| LMArena Math | — | 1366 |
Knowledge Not comparable
Step 3.7 Flash: —, Trinity Large Thinking: 40.9 (#113)
| Benchmark | Step 3.7 Flash | Trinity Large Thinking |
|---|---|---|
| Vectara Hallucination Rate | — | 6.9% |
| LMArena Expert | — | 1360 |
Multilingual Not comparable
Step 3.7 Flash: —, Trinity Large Thinking: 46.2 (#160)
| Benchmark | Step 3.7 Flash | Trinity Large Thinking |
|---|---|---|
| LMArena Non-English | — | 1325 |
| LMArena Chinese | — | 1373 |
| LMArena French | — | 1374 |
| LMArena German | — | 1356 |
| LMArena Japanese | — | 1311 |
| LMArena Korean | — | 1306 |
| LMArena Russian | — | 1337 |
| LMArena Spanish | — | 1357 |
Instruction Following Not comparable
Step 3.7 Flash: —, Trinity Large Thinking: 70.5 (#162)
| Benchmark | Step 3.7 Flash | Trinity Large Thinking |
|---|---|---|
| LMArena Instruction Following | — | 1334 |
Long Context Not comparable
Step 3.7 Flash: —, Trinity Large Thinking: 41.3 (#144)
| Benchmark | Step 3.7 Flash | Trinity Large Thinking |
|---|---|---|
| LMArena Longer Query | — | 1355 |
Writing & Preference Not comparable
Step 3.7 Flash: —, Trinity Large Thinking: 53.8 (#158)
| Benchmark | Step 3.7 Flash | Trinity Large Thinking |
|---|---|---|
| LMArena Text | — | 1340 |
| LMArena Creative Writing | — | 1320 |
| LMArena Multi-Turn | — | 1342 |
Frequently asked questions
Is Step 3.7 Flash better than Trinity Large Thinking?
Trinity Large Thinking is the stronger model overall, scoring 38.6 to 37.3 on the Noometry Index.
Which is cheaper, Step 3.7 Flash or Trinity Large Thinking?
Trinity Large Thinking is cheaper. It lists at $0.25 per million input tokens and $0.80 per million output tokens; Step 3.7 Flash lists at $0.18 and $1.11.
Is Step 3.7 Flash or Trinity Large Thinking better for coding?
Step 3.7 Flash scores higher on coding benchmarks: 40.0 versus 34.1 in the Noometry coding category.
Which has the bigger context window?
Trinity Large Thinking does, with 262K tokens against 256K.
How many benchmarks do Step 3.7 Flash and Trinity Large Thinking share?
3 benchmarks have published results for both models. Step 3.7 Flash has 5 scored results on Noometry and Trinity Large Thinking has 24.