Model comparison
Longcat Flash Chat vs Step 3.7 Flash
Longcat Flash Chat is the stronger model overall, scoring 42.1 to 37.3 on the Noometry Index.
Last verified . 1 shared benchmarks.
StepFunSummary
- They share 1 benchmark with published results for both. Longcat Flash Chat scores higher in 1 category and Step 3.7 Flash in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Step 3.7 Flash leads 42.9 to 39.4.
- The biggest single-benchmark swing is NYT Connections (extended): 17.7% for Longcat Flash Chat and 39.7% for Step 3.7 Flash.
Side by side
| Longcat Flash Chat | Step 3.7 Flash | |
|---|---|---|
| Provider | Meituan | StepFun |
| Noometry Index | 42.1 | 37.3 |
| Released | — | 2026-05-29 |
| Weights | Open | Open |
| Context window | — | 256K |
| Max output | — | 256K |
| Input $ / M tokens | — | $0.18 |
| Output $ / M tokens | — | $1.11 |
| Results tracked | 19 | 5 |
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Category by category
Coding Longcat Flash Chat leads
Longcat Flash Chat: 43.5 (#87), Step 3.7 Flash: 40.0 (#150)
| Benchmark | Longcat Flash Chat | Step 3.7 Flash |
|---|---|---|
| SciCode | — | 40% |
| LMArena Coding | 1471 | — |
| ALE-Bench | — | 694.12 |
Reasoning Step 3.7 Flash leads
Longcat Flash Chat: 19.0 (#272), Step 3.7 Flash: 21.6 (#219)
| Benchmark | Longcat Flash Chat | Step 3.7 Flash |
|---|---|---|
| NYT Connections (extended) | 17.7% | 39.7% |
| Kagi LLM Benchmark | 43.9% | — |
| CritPt | — | 2.3% |
| LMArena Hard Prompts | 1440 | — |
Math Step 3.7 Flash leads
Longcat Flash Chat: 39.4 (#107), Step 3.7 Flash: 42.9 (#82)
| Benchmark | Longcat Flash Chat | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 68.5% |
| LMArena Math | 1442 | — |
Knowledge Not comparable
Longcat Flash Chat: 40.6 (#116), Step 3.7 Flash: —
| Benchmark | Longcat Flash Chat | Step 3.7 Flash |
|---|---|---|
| LMArena Expert | 1454 | — |
Multilingual Not comparable
Longcat Flash Chat: 51.9 (#101), Step 3.7 Flash: —
| Benchmark | Longcat Flash Chat | Step 3.7 Flash |
|---|---|---|
| LMArena Non-English | 1404 | — |
| LMArena Chinese | 1465 | — |
| LMArena French | 1456 | — |
| LMArena German | 1408 | — |
| LMArena Japanese | 1373 | — |
| LMArena Korean | 1371 | — |
| LMArena Russian | 1395 | — |
| LMArena Spanish | 1445 | — |
Instruction Following Not comparable
Longcat Flash Chat: 74.4 (#96), Step 3.7 Flash: —
| Benchmark | Longcat Flash Chat | Step 3.7 Flash |
|---|---|---|
| LMArena Instruction Following | 1411 | — |
Long Context Not comparable
Longcat Flash Chat: 43.5 (#93), Step 3.7 Flash: —
| Benchmark | Longcat Flash Chat | Step 3.7 Flash |
|---|---|---|
| LMArena Longer Query | 1425 | — |
Writing & Preference Not comparable
Longcat Flash Chat: 61.0 (#91), Step 3.7 Flash: —
| Benchmark | Longcat Flash Chat | Step 3.7 Flash |
|---|---|---|
| LMArena Text | 1427 | — |
| LMArena Creative Writing | 1388 | — |
| LMArena Multi-Turn | 1418 | — |
Frequently asked questions
Is Longcat Flash Chat better than Step 3.7 Flash?
Longcat Flash Chat is the stronger model overall, scoring 42.1 to 37.3 on the Noometry Index.
Is Longcat Flash Chat or Step 3.7 Flash better for coding?
Longcat Flash Chat scores higher on coding benchmarks: 43.5 versus 40.0 in the Noometry coding category.
How many benchmarks do Longcat Flash Chat and Step 3.7 Flash share?
1 benchmark has published results for both models. Longcat Flash Chat has 19 scored results on Noometry and Step 3.7 Flash has 5.