Model comparison
GPT-5.4 Pro vs Step 3
GPT-5.4 Pro is the stronger model overall, scoring 58.9 to 40.5 on the Noometry Index.
Last verified . 0 shared benchmarks.
StepFunSummary
- The widest gap is in reasoning, where GPT-5.4 Pro leads 70.7 to 28.4.
- Step 3 has downloadable open weights; the other is API-only.
Side by side
| GPT-5.4 Pro | Step 3 | |
|---|---|---|
| Provider | OpenAI | StepFun |
| Noometry Index | 58.9 | 40.5 |
| Released | 2026-03-05 | — |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $30 | — |
| Output $ / M tokens | $180 | — |
| Results tracked | 16 | 17 |
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Category by category
Coding GPT-5.4 Pro leads
GPT-5.4 Pro: 43.2 (#90), Step 3: 40.1 (#147)
| Benchmark | GPT-5.4 Pro | Step 3 |
|---|---|---|
| WeirdML | 57.4% | — |
| LMArena Coding | — | 1367 |
Reasoning GPT-5.4 Pro leads
GPT-5.4 Pro: 70.7 (#13), Step 3: 28.4 (#105)
| Benchmark | GPT-5.4 Pro | Step 3 |
|---|---|---|
| ARC-AGI-2 | 83.3% | — |
| SimpleBench | 74.1% | — |
| Kagi LLM Benchmark | — | 62.3% |
| ARC-AGI-1 | 94.5% | — |
| CritPt | 30% | — |
| Chess Puzzles | 58.6% | — |
| EnigmaEval | 23.8% | — |
| LMArena Hard Prompts | — | 1355 |
| Epoch Capabilities Index | 158.93 | — |
Math GPT-5.4 Pro leads
GPT-5.4 Pro: 72.4 (#22), Step 3: 37.6 (#148)
| Benchmark | GPT-5.4 Pro | Step 3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 82.5% | — |
| FrontierMath Tier 4 | 58.5% | — |
| LMArena Math | — | 1366 |
| FrontierMath (Feb 2025 set) | 50% | — |
| FrontierMath Tier 4 (v1) | 37.5% | — |
Knowledge GPT-5.4 Pro leads
GPT-5.4 Pro: 68.3 (#7), Step 3: 36.8 (#164)
| Benchmark | GPT-5.4 Pro | Step 3 |
|---|---|---|
| GPQA Diamond | 94.6% | — |
| Humanity's Last Exam | 44.3% | — |
| SimpleQA Verified | 46.3% | — |
| Vectara Hallucination Rate | 8.3% | — |
| LMArena Expert | — | 1333 |
Multimodal Not comparable
GPT-5.4 Pro: —, Step 3: 35.5 (#86)
| Benchmark | GPT-5.4 Pro | Step 3 |
|---|---|---|
| LMArena Vision | — | 1177 |
Multilingual Not comparable
GPT-5.4 Pro: —, Step 3: 46.3 (#159)
| Benchmark | GPT-5.4 Pro | Step 3 |
|---|---|---|
| LMArena Non-English | — | 1327 |
| LMArena Chinese | — | 1397 |
| LMArena German | — | 1371 |
| LMArena Korean | — | 1269 |
| LMArena Russian | — | 1331 |
| LMArena Spanish | — | 1371 |
Instruction Following Not comparable
GPT-5.4 Pro: —, Step 3: 70.4 (#164)
| Benchmark | GPT-5.4 Pro | Step 3 |
|---|---|---|
| LMArena Instruction Following | — | 1332 |
Long Context Not comparable
GPT-5.4 Pro: —, Step 3: 40.3 (#157)
| Benchmark | GPT-5.4 Pro | Step 3 |
|---|---|---|
| LMArena Longer Query | — | 1326 |
Writing & Preference Not comparable
GPT-5.4 Pro: —, Step 3: 54.3 (#151)
| Benchmark | GPT-5.4 Pro | Step 3 |
|---|---|---|
| LMArena Text | — | 1350 |
| LMArena Creative Writing | — | 1321 |
| LMArena Multi-Turn | — | 1341 |
Frequently asked questions
Is GPT-5.4 Pro better than Step 3?
GPT-5.4 Pro is the stronger model overall, scoring 58.9 to 40.5 on the Noometry Index.
Is GPT-5.4 Pro or Step 3 better for coding?
GPT-5.4 Pro scores higher on coding benchmarks: 43.2 versus 40.1 in the Noometry coding category.
How many benchmarks do GPT-5.4 Pro and Step 3 share?
0 benchmarks have published results for both models. GPT-5.4 Pro has 16 scored results on Noometry and Step 3 has 17.