Model comparison
Mercury vs Step 3.7 Flash
Mercury and Step 3.7 Flash score almost the same on the Noometry Index (37.6 vs 37.3), so choose on price, context window or the category you care about most.
Last verified . 0 shared benchmarks.
StepFunSummary
- The widest gap is in reasoning, where Step 3.7 Flash leads 21.6 to 17.5.
- Step 3.7 Flash has downloadable open weights; the other is API-only.
Side by side
| Mercury | Step 3.7 Flash | |
|---|---|---|
| Provider | Inception | StepFun |
| Noometry Index | 37.6 | 37.3 |
| Released | — | 2026-05-29 |
| Weights | Proprietary | Open |
| Context window | — | 256K |
| Max output | — | 256K |
| Input $ / M tokens | — | $0.18 |
| Output $ / M tokens | — | $1.11 |
| Results tracked | 9 | 5 |
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Category by category
Coding Step 3.7 Flash leads
Mercury: 38.7 (#170), Step 3.7 Flash: 40.0 (#150)
| Benchmark | Mercury | Step 3.7 Flash |
|---|---|---|
| SciCode | — | 40% |
| LMArena Coding | 1322 | — |
| ALE-Bench | — | 694.12 |
Reasoning Step 3.7 Flash leads
Mercury: 17.5 (#293), Step 3.7 Flash: 21.6 (#219)
| Benchmark | Mercury | Step 3.7 Flash |
|---|---|---|
| Kagi LLM Benchmark | 21.6% | — |
| NYT Connections (extended) | — | 39.7% |
| CritPt | — | 2.3% |
| LMArena Hard Prompts | 1285 | — |
Math Not comparable
Mercury: —, Step 3.7 Flash: 42.9 (#82)
| Benchmark | Mercury | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 68.5% |
Multilingual Not comparable
Mercury: 41.6 (#206), Step 3.7 Flash: —
| Benchmark | Mercury | Step 3.7 Flash |
|---|---|---|
| LMArena Non-English | 1260 | — |
Instruction Following Not comparable
Mercury: 65.2 (#224), Step 3.7 Flash: —
| Benchmark | Mercury | Step 3.7 Flash |
|---|---|---|
| LMArena Instruction Following | 1239 | — |
Long Context Not comparable
Mercury: 38.4 (#198), Step 3.7 Flash: —
| Benchmark | Mercury | Step 3.7 Flash |
|---|---|---|
| LMArena Longer Query | 1266 | — |
Writing & Preference Not comparable
Mercury: 46.2 (#221), Step 3.7 Flash: —
| Benchmark | Mercury | Step 3.7 Flash |
|---|---|---|
| LMArena Text | 1282 | — |
| LMArena Creative Writing | 1191 | — |
| LMArena Multi-Turn | 1282 | — |
Frequently asked questions
Is Mercury better than Step 3.7 Flash?
Mercury and Step 3.7 Flash score almost the same on the Noometry Index (37.6 vs 37.3), so choose on price, context window or the category you care about most.
Is Mercury or Step 3.7 Flash better for coding?
Step 3.7 Flash scores higher on coding benchmarks: 40.0 versus 38.7 in the Noometry coding category.
How many benchmarks do Mercury and Step 3.7 Flash share?
0 benchmarks have published results for both models. Mercury has 9 scored results on Noometry and Step 3.7 Flash has 5.