Model comparison
o1 vs Step 2 16k Exp 202412
o1 is the stronger model overall, scoring 40.9 to 39.2 on the Noometry Index.
Last verified . 12 shared benchmarks.
StepFunSummary
- They share 12 benchmarks with published results for both. o1 scores higher in 7 categories and Step 2 16k Exp 202412 in 1 category; 7 gaps are clear of the uncertainty.
- The widest gap is in long context, where o1 leads 50.3 to 39.7.
Side by side
| o1 | Step 2 16k Exp 202412 | |
|---|---|---|
| Provider | OpenAI | StepFun |
| Noometry Index | 40.9 | 39.2 |
| Released | 2024-09-12 | — |
| Weights | Proprietary | Proprietary |
| Context window | 200K | — |
| Max output | 100K | — |
| Input $ / M tokens | $15 | — |
| Output $ / M tokens | $60 | — |
| Results tracked | 52 | 12 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding o1 leads
o1: 46.1 (#70), Step 2 16k Exp 202412: 38.5 (#174)
| Benchmark | o1 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Coding | 1367 | 1316 |
| Aider Polyglot | 61.7% | — |
| WeirdML | 47.6% | — |
| LiveBench Coding | 69.7% | — |
| CadEval | 56% | — |
| HumanEval+ | 89% | — |
| MBPP+ | 80.2% | — |
Agentic & Tool Use Not comparable
o1: 24.6 (#117), Step 2 16k Exp 202412: —
| Benchmark | o1 | Step 2 16k Exp 202412 |
|---|---|---|
| Cybench | 10% | — |
| METR Time Horizons | 51.1% | — |
Reasoning o1 leads
o1: 27.9 (#111), Step 2 16k Exp 202412: 25.9 (#142)
| Benchmark | o1 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Hard Prompts | 1371 | 1299 |
| SimpleBench | 41.7% | — |
| ARC-AGI-1 | 30.7% | — |
| Chess Puzzles | 15% | — |
| EnigmaEval | 5.7% | — |
| LiveBench Reasoning | 91.6% | — |
| DTBench | 74.7% | — |
| LiveBench Data Analysis | 65.5% | — |
| LMCA | 22.3% | — |
| Epoch Capabilities Index | 141.91 | — |
| LiveBench | 75.7% | — |
Math Too close to call
o1: 36.1 (#175), Step 2 16k Exp 202412: 36.3 (#169)
| Benchmark | o1 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Math | 1388 | 1304 |
| FrontierMath (Tiers 1-3) | 14.7% | — |
| OTIS Mock AIME 2024-2025 | 73.3% | — |
| LiveBench Math | 80.3% | — |
| MATH Level 5 | 94.7% | — |
| FrontierMath (Feb 2025 set) | 9.3% | — |
Knowledge o1 leads
o1: 41.5 (#110), Step 2 16k Exp 202412: 35.2 (#187)
| Benchmark | o1 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Expert | 1361 | 1279 |
| GPQA Diamond | 76.8% | — |
| Humanity's Last Exam | 8% | — |
| SimpleQA Verified | 41.1% | — |
| Confabulations | 11.7% | — |
Multimodal Not comparable
o1: 34.2 (#93), Step 2 16k Exp 202412: —
| Benchmark | o1 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Vision | 1168 | — |
| GeoBench | 80% | — |
| VPCT | 37% | — |
| SpatialViz-Bench | 41.4% | — |
Multilingual o1 leads
o1: 48.6 (#142), Step 2 16k Exp 202412: 43.7 (#181)
| Benchmark | o1 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Non-English | 1358 | 1290 |
| LMArena Chinese | 1394 | 1331 |
| LMArena Russian | 1356 | 1324 |
| LMArena French | 1344 | — |
| LMArena German | 1337 | — |
| LMArena Japanese | 1346 | — |
| LMArena Korean | 1396 | — |
| LMArena Spanish | 1345 | — |
Instruction Following o1 leads
o1: 74.8 (#86), Step 2 16k Exp 202412: 67.9 (#192)
| Benchmark | o1 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Instruction Following | 1367 | 1287 |
| LiveBench Instruction Following | 81.5% | — |
Long Context o1 leads
o1: 50.3 (#9), Step 2 16k Exp 202412: 39.7 (#170)
| Benchmark | o1 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Longer Query | 1378 | 1307 |
| Fiction.LiveBench | 83.3% | — |
Writing & Preference o1 leads
o1: 55.6 (#144), Step 2 16k Exp 202412: 52.3 (#173)
| Benchmark | o1 | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Text | 1366 | 1321 |
| LMArena Creative Writing | 1348 | 1328 |
| LMArena Multi-Turn | 1369 | 1292 |
| Short-Story Creative Writing | 70.2% | — |
| LiveBench Language | 65.4% | — |
Frequently asked questions
Is o1 better than Step 2 16k Exp 202412?
o1 is the stronger model overall, scoring 40.9 to 39.2 on the Noometry Index.
Is o1 or Step 2 16k Exp 202412 better for coding?
o1 scores higher on coding benchmarks: 46.1 versus 38.5 in the Noometry coding category.
How many benchmarks do o1 and Step 2 16k Exp 202412 share?
12 benchmarks have published results for both models. o1 has 52 scored results on Noometry and Step 2 16k Exp 202412 has 12.