Model comparison
Grok 4.3 vs Step 1o Turbo 202506
Grok 4.3 is the stronger model overall, scoring 43.8 to 39.7 on the Noometry Index.
Last verified . 14 shared benchmarks.
StepFunSummary
- They share 14 benchmarks with published results for both. Grok 4.3 scores higher in 8 categories and Step 1o Turbo 202506 in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 4.3 leads 52.5 to 36.1.
Side by side
| Grok 4.3 | Step 1o Turbo 202506 | |
|---|---|---|
| Provider | xAI | StepFun |
| Noometry Index | 43.8 | 39.7 |
| Released | 2026-04-17 | — |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 30K | — |
| Input $ / M tokens | $1.25 | — |
| Output $ / M tokens | $2.50 | — |
| Results tracked | 40 | 14 |
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Category by category
Coding Grok 4.3 leads
Grok 4.3: 41.6 (#121), Step 1o Turbo 202506: 39.2 (#160)
| Benchmark | Grok 4.3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Coding | 1415 | 1339 |
| LMArena WebDev | 1357 | — |
| SciCode | 47.3% | — |
| WeirdML | 49.9% | — |
| ALE-Bench | 944.17 | — |
Agentic & Tool Use Not comparable
Grok 4.3: 27.7 (#99), Step 1o Turbo 202506: —
| Benchmark | Grok 4.3 | Step 1o Turbo 202506 |
|---|---|---|
| GDP.pdf | 8% | — |
| LMArena Search | 1165 | — |
| Vending-Bench 2 | 35.26 | — |
Reasoning Grok 4.3 leads
Grok 4.3: 35.9 (#68), Step 1o Turbo 202506: 26.8 (#129)
| Benchmark | Grok 4.3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Hard Prompts | 1396 | 1335 |
| NYT Connections (extended) | 55.2% | — |
| CritPt | 8% | — |
| Chess Puzzles | 25% | — |
| DTBench | 90.7% | — |
| LMCA | 38.3% | — |
| Epoch Capabilities Index | 149.16 | — |
| ForecastBench | 60.3 | — |
Math Grok 4.3 leads
Grok 4.3: 46.0 (#74), Step 1o Turbo 202506: 36.6 (#164)
| Benchmark | Grok 4.3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Math | 1388 | 1318 |
| FrontierMath (Tiers 1-3) | 42.8% | — |
| FrontierMath Tier 4 | 14.6% | — |
| OTIS Mock AIME 2024-2025 | 93.3% | — |
| ProofBench | 11% | — |
Knowledge Grok 4.3 leads
Grok 4.3: 52.5 (#62), Step 1o Turbo 202506: 36.1 (#176)
| Benchmark | Grok 4.3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Expert | 1385 | 1308 |
| GPQA Diamond | 88.8% | — |
| SimpleQA Verified | 33.2% | — |
Multimodal Step 1o Turbo 202506 leads
Grok 4.3: 31.6 (#104), Step 1o Turbo 202506: 36.1 (#80)
| Benchmark | Grok 4.3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Vision | 1229 | 1186 |
| Blueprint-Bench 2 | 0% | — |
Multilingual Grok 4.3 leads
Grok 4.3: 50.5 (#120), Step 1o Turbo 202506: 45.3 (#173)
| Benchmark | Grok 4.3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Non-English | 1385 | 1313 |
| LMArena Chinese | 1422 | 1380 |
| LMArena German | 1395 | 1314 |
| LMArena Russian | 1399 | 1327 |
| LMArena French | 1412 | — |
| LMArena Japanese | 1379 | — |
| LMArena Korean | 1356 | — |
| LMArena Spanish | 1398 | — |
Instruction Following Grok 4.3 leads
Grok 4.3: 72.1 (#140), Step 1o Turbo 202506: 69.2 (#176)
| Benchmark | Grok 4.3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Instruction Following | 1366 | 1310 |
Long Context Grok 4.3 leads
Grok 4.3: 42.5 (#123), Step 1o Turbo 202506: 41.0 (#146)
| Benchmark | Grok 4.3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Longer Query | 1393 | 1348 |
Writing & Preference Grok 4.3 leads
Grok 4.3: 58.5 (#118), Step 1o Turbo 202506: 53.1 (#160)
| Benchmark | Grok 4.3 | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Text | 1397 | 1336 |
| LMArena Creative Writing | 1380 | 1307 |
| LMArena Multi-Turn | 1406 | 1340 |
| EQ-Bench 4 | 1075 | — |
Frequently asked questions
Is Grok 4.3 better than Step 1o Turbo 202506?
Grok 4.3 is the stronger model overall, scoring 43.8 to 39.7 on the Noometry Index.
Is Grok 4.3 or Step 1o Turbo 202506 better for coding?
Grok 4.3 scores higher on coding benchmarks: 41.6 versus 39.2 in the Noometry coding category.
How many benchmarks do Grok 4.3 and Step 1o Turbo 202506 share?
14 benchmarks have published results for both models. Grok 4.3 has 40 scored results on Noometry and Step 1o Turbo 202506 has 14.