Model comparison
Mercury 2 vs Step 2 16k Exp 202412
Mercury 2 and Step 2 16k Exp 202412 score almost the same on the Noometry Index (39.1 vs 39.2), so choose on price, context window or the category you care about most.
Last verified . 11 shared benchmarks.
StepFunSummary
- They share 11 benchmarks with published results for both. Mercury 2 scores higher in 5 categories and Step 2 16k Exp 202412 in 2 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in coding, where Step 2 16k Exp 202412 leads 38.5 to 33.5.
Side by side
| Mercury 2 | Step 2 16k Exp 202412 | |
|---|---|---|
| Provider | Inception | StepFun |
| Noometry Index | 39.1 | 39.2 |
| Released | 2026-02-20 | — |
| Weights | Proprietary | Proprietary |
| Context window | 128K | — |
| Max output | 50K | — |
| Input $ / M tokens | $0.25 | — |
| Output $ / M tokens | $0.75 | — |
| Results tracked | 17 | 12 |
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Category by category
Coding Step 2 16k Exp 202412 leads
Mercury 2: 33.5 (#255), Step 2 16k Exp 202412: 38.5 (#174)
| Benchmark | Mercury 2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Coding | 1391 | 1316 |
| LMArena WebDev | 1171 | — |
| SciCode | 38.7% | — |
| WeirdML | 43.2% | — |
| ALE-Bench | 785.58 | — |
Reasoning Step 2 16k Exp 202412 leads
Mercury 2: 23.8 (#170), Step 2 16k Exp 202412: 25.9 (#142)
| Benchmark | Mercury 2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Hard Prompts | 1362 | 1299 |
| CritPt | 0.8% | — |
Math Not comparable
Mercury 2: —, Step 2 16k Exp 202412: 36.3 (#169)
| Benchmark | Mercury 2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Math | — | 1304 |
Knowledge Mercury 2 leads
Mercury 2: 36.2 (#172), Step 2 16k Exp 202412: 35.2 (#187)
| Benchmark | Mercury 2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Expert | 1358 | 1279 |
| Vectara Hallucination Rate | 12.3% | — |
Multilingual Mercury 2 leads
Mercury 2: 46.6 (#157), Step 2 16k Exp 202412: 43.7 (#181)
| Benchmark | Mercury 2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Non-English | 1331 | 1290 |
| LMArena Chinese | 1417 | 1331 |
| LMArena Russian | 1304 | 1324 |
Instruction Following Mercury 2 leads
Mercury 2: 70.2 (#165), Step 2 16k Exp 202412: 67.9 (#192)
| Benchmark | Mercury 2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Instruction Following | 1329 | 1287 |
Long Context Too close to call
Mercury 2: 40.5 (#154), Step 2 16k Exp 202412: 39.7 (#170)
| Benchmark | Mercury 2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Longer Query | 1330 | 1307 |
Writing & Preference Mercury 2 leads
Mercury 2: 53.8 (#155), Step 2 16k Exp 202412: 52.3 (#173)
| Benchmark | Mercury 2 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Text | 1355 | 1321 |
| LMArena Creative Writing | 1289 | 1328 |
| LMArena Multi-Turn | 1358 | 1292 |
Frequently asked questions
Is Mercury 2 better than Step 2 16k Exp 202412?
Mercury 2 and Step 2 16k Exp 202412 score almost the same on the Noometry Index (39.1 vs 39.2), so choose on price, context window or the category you care about most.
Is Mercury 2 or Step 2 16k Exp 202412 better for coding?
Step 2 16k Exp 202412 scores higher on coding benchmarks: 38.5 versus 33.5 in the Noometry coding category.
How many benchmarks do Mercury 2 and Step 2 16k Exp 202412 share?
11 benchmarks have published results for both models. Mercury 2 has 17 scored results on Noometry and Step 2 16k Exp 202412 has 12.