Model comparison
GPT-6 Sol vs Step 2 16k Exp 202412
GPT-6 Sol is the stronger model overall, scoring 49.2 to 38.6 on the Noometry Index.
Last verified . 12 shared benchmarks.
StepFunSummary
- They share 12 benchmarks with published results for both. GPT-6 Sol scores higher in 8 categories and Step 2 16k Exp 202412 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-6 Sol leads 49.3 to 24.8.
Side by side
| GPT-6 Sol | Step 2 16k Exp 202412 | |
|---|---|---|
| Provider | OpenAI | StepFun |
| Noometry Index | 49.2 | 38.6 |
| Released | 2026-09-22 | — |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 22 | 12 |
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Category by category
Coding GPT-6 Sol leads
GPT-6 Sol: 59.6 (#11), Step 2 16k Exp 202412: 37.9 (#170)
| Benchmark | GPT-6 Sol | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Coding | 1453 | 1316 |
| DeepSWE | 68.8% | — |
| FrontierCode | 49.3% | — |
| LMArena WebDev | 1692 | — |
Agentic & Tool Use Not comparable
GPT-6 Sol: 33.5 (#49), Step 2 16k Exp 202412: —
| Benchmark | GPT-6 Sol | Step 2 16k Exp 202412 |
|---|---|---|
| GDP.pdf | 28% | — |
Reasoning GPT-6 Sol leads
GPT-6 Sol: 49.3 (#34), Step 2 16k Exp 202412: 24.8 (#140)
| Benchmark | GPT-6 Sol | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Hard Prompts | 1420 | 1299 |
| NYT Connections (extended) | 90.1% | — |
| EBR-Bench | 53.3% | — |
Math GPT-6 Sol leads
GPT-6 Sol: 35.8 (#135), Step 2 16k Exp 202412: 33.6 (#171)
| Benchmark | GPT-6 Sol | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Math | 1404 | 1305 |
Knowledge GPT-6 Sol leads
GPT-6 Sol: 43.0 (#87), Step 2 16k Exp 202412: 34.6 (#187)
| Benchmark | GPT-6 Sol | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Expert | 1449 | 1279 |
| Vectara Hallucination Rate | 6.5% | — |
Multimodal Not comparable
GPT-6 Sol: 47.6 (#9), Step 2 16k Exp 202412: —
| Benchmark | GPT-6 Sol | Step 2 16k Exp 202412 |
|---|---|---|
| Furniture Assembly | 58.3% | — |
Multilingual GPT-6 Sol leads
GPT-6 Sol: 51.0 (#113), Step 2 16k Exp 202412: 43.9 (#176)
| Benchmark | GPT-6 Sol | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Non-English | 1389 | 1290 |
| LMArena Chinese | 1416 | 1331 |
| LMArena Russian | 1407 | 1324 |
| LMArena Spanish | 1377 | — |
Instruction Following GPT-6 Sol leads
GPT-6 Sol: 74.4 (#97), Step 2 16k Exp 202412: 68.1 (#187)
| Benchmark | GPT-6 Sol | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Instruction Following | 1406 | 1287 |
Long Context GPT-6 Sol leads
GPT-6 Sol: 43.2 (#100), Step 2 16k Exp 202412: 39.7 (#165)
| Benchmark | GPT-6 Sol | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Longer Query | 1415 | 1307 |
Writing & Preference GPT-6 Sol leads
GPT-6 Sol: 72.3 (#15), Step 2 16k Exp 202412: 52.5 (#168)
| Benchmark | GPT-6 Sol | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Text | 1396 | 1321 |
| LMArena Creative Writing | 1392 | 1328 |
| LMArena Multi-Turn | 1405 | 1292 |
| EQ-Bench Creative Writing | 2125 | — |
Frequently asked questions
Is GPT-6 Sol better than Step 2 16k Exp 202412?
GPT-6 Sol is the stronger model overall, scoring 49.2 to 38.6 on the Noometry Index.
Is GPT-6 Sol or Step 2 16k Exp 202412 better for coding?
GPT-6 Sol scores higher on coding benchmarks: 59.6 versus 37.9 in the Noometry coding category.
How many benchmarks do GPT-6 Sol and Step 2 16k Exp 202412 share?
12 benchmarks have published results for both models. GPT-6 Sol has 22 scored results on Noometry and Step 2 16k Exp 202412 has 12.