Model comparison
GPT-4o mini vs Step 2 16k Exp 202412
Step 2 16k Exp 202412 is the stronger model overall, scoring 38.6 to 25.4 on the Noometry Index.
Last verified . 12 shared benchmarks.
StepFunSummary
- They share 12 benchmarks with published results for both. GPT-4o mini scores higher in 0 categories and Step 2 16k Exp 202412 in 8 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in math, where Step 2 16k Exp 202412 leads 33.6 to 9.9.
Side by side
| GPT-4o mini | Step 2 16k Exp 202412 | |
|---|---|---|
| Provider | OpenAI | StepFun |
| Noometry Index | 25.4 | 38.6 |
| Released | 2024-07-18 | — |
| Weights | Proprietary | Proprietary |
| Context window | 128K | — |
| Max output | 16K | — |
| Input $ / M tokens | $0.15 | — |
| Output $ / M tokens | $0.60 | — |
| Results tracked | 60 | 12 |
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Category by category
Coding Step 2 16k Exp 202412 leads
GPT-4o mini: 21.6 (#330), Step 2 16k Exp 202412: 37.9 (#170)
| Benchmark | GPT-4o mini | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Coding | 1290 | 1316 |
| Aider Polyglot | 3.6% | — |
| WeirdML | 11.8% | — |
| BigCodeBench Instruct | 46.1% | — |
| LiveBench Coding | 43.1% | — |
| BigCodeBench Complete | 57.4% | — |
| HumanEval+ | 83.5% | — |
| MBPP+ | 72.2% | — |
Agentic & Tool Use Not comparable
GPT-4o mini: 27.2 (#95), Step 2 16k Exp 202412: —
| Benchmark | GPT-4o mini | Step 2 16k Exp 202412 |
|---|---|---|
| BALROG | 17.4% | — |
Reasoning Step 2 16k Exp 202412 leads
GPT-4o mini: 8.7 (#343), Step 2 16k Exp 202412: 24.8 (#140)
| Benchmark | GPT-4o mini | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Hard Prompts | 1267 | 1299 |
| ARC-AGI-2 | 0% | — |
| SimpleBench | 10.7% | — |
| Kagi LLM Benchmark | 28.8% | — |
| Chess Puzzles | 0% | — |
| LiveBench Reasoning | 32.8% | — |
| Mystery Game Puzzles | 12% | — |
| DTBench | 54.4% | — |
| LiveBench Data Analysis | 50% | — |
| LMCA | 10.4% | — |
| Epoch Capabilities Index | 126.56 | — |
| LiveBench | 41.3% | — |
| PIQA | 88.7% | — |
Math Step 2 16k Exp 202412 leads
GPT-4o mini: 9.9 (#307), Step 2 16k Exp 202412: 33.6 (#171)
| Benchmark | GPT-4o mini | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Math | 1267 | 1305 |
| FrontierMath (Tiers 1-3) | 0.7% | — |
| OTIS Mock AIME 2024-2025 | 6.9% | — |
| Omni-MATH | 28% | — |
| LiveBench Math | 36.3% | — |
| MATH Level 5 | 52.6% | — |
| GSM8K | 91.3% | — |
Knowledge Step 2 16k Exp 202412 leads
GPT-4o mini: 17.7 (#279), Step 2 16k Exp 202412: 34.6 (#187)
| Benchmark | GPT-4o mini | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Expert | 1235 | 1279 |
| GPQA Diamond | 37.7% | — |
| SimpleQA Verified | 8.3% | — |
| MMLU-Pro | 60.3% | — |
| Confabulations | 37.2% | — |
| GPQA (HELM) | 36.8% | — |
| BoolQ | 88.7% | — |
| MMLU | 81.8% | — |
Multimodal Not comparable
GPT-4o mini: 25.3 (#117), Step 2 16k Exp 202412: —
| Benchmark | GPT-4o mini | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Vision | 1066 | — |
| Video-MME | 64.8% | — |
| GeoBench | 64% | — |
| VPCT | 34% | — |
Multilingual Step 2 16k Exp 202412 leads
GPT-4o mini: 42.2 (#194), Step 2 16k Exp 202412: 43.9 (#176)
| Benchmark | GPT-4o mini | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Non-English | 1266 | 1290 |
| LMArena Chinese | 1264 | 1331 |
| LMArena Russian | 1275 | 1324 |
| LMArena French | 1296 | — |
| LMArena German | 1272 | — |
| LMArena Japanese | 1216 | — |
| LMArena Korean | 1195 | — |
| LMArena Spanish | 1276 | — |
Instruction Following Step 2 16k Exp 202412 leads
GPT-4o mini: 62.1 (#234), Step 2 16k Exp 202412: 68.1 (#187)
| Benchmark | GPT-4o mini | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Instruction Following | 1259 | 1287 |
| LiveBench Instruction Following | 56.8% | — |
| IFEval | 78.2% | — |
Long Context Too close to call
GPT-4o mini: 39.1 (#181), Step 2 16k Exp 202412: 39.7 (#165)
| Benchmark | GPT-4o mini | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Longer Query | 1289 | 1307 |
Writing & Preference Step 2 16k Exp 202412 leads
GPT-4o mini: 39.7 (#243), Step 2 16k Exp 202412: 52.5 (#168)
| Benchmark | GPT-4o mini | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Text | 1286 | 1321 |
| LMArena Creative Writing | 1268 | 1328 |
| LMArena Multi-Turn | 1285 | 1292 |
| Short-Story Creative Writing | 67.2% | — |
| EQ-Bench Creative Writing | 873 | — |
| WildBench | 79.1% | — |
| LiveBench Language | 28.6% | — |
Frequently asked questions
Is GPT-4o mini better than Step 2 16k Exp 202412?
Step 2 16k Exp 202412 is the stronger model overall, scoring 38.6 to 25.4 on the Noometry Index.
Is GPT-4o mini or Step 2 16k Exp 202412 better for coding?
Step 2 16k Exp 202412 scores higher on coding benchmarks: 37.9 versus 21.6 in the Noometry coding category.
How many benchmarks do GPT-4o mini and Step 2 16k Exp 202412 share?
12 benchmarks have published results for both models. GPT-4o mini has 60 scored results on Noometry and Step 2 16k Exp 202412 has 12.