Model comparison
Grok 4.20 Multi-Agent vs Step 5 Preview
Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 43.8 on the Noometry Index.
Last verified . 0 shared benchmarks.
StepFunSummary
- The widest gap is in coding, where Step 5 Preview leads 50.6 to 42.4.
- Step 5 Preview is cheaper at $1 / $2.70 per million input/output tokens, against $1.25 / $2.50 for Grok 4.20 Multi-Agent.
- Step 5 Preview accepts more context: 1.02M tokens versus 1M.
Side by side
| Grok 4.20 Multi-Agent | Step 5 Preview | |
|---|---|---|
| Provider | xAI | StepFun |
| Noometry Index | 45.5 | 43.8 |
| Released | 2026-03-09 | 2026-09-16 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 1.02M |
| Max output | 30K | 66K |
| Input $ / M tokens | $1.25 | $1 |
| Output $ / M tokens | $2.50 | $2.70 |
| Results tracked | 20 | 3 |
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Category by category
Coding Step 5 Preview leads
Grok 4.20 Multi-Agent: 42.4 (#91), Step 5 Preview: 50.6 (#40)
| Benchmark | Grok 4.20 Multi-Agent | Step 5 Preview |
|---|---|---|
| LMArena WebDev | — | 1569 |
| SciCode | — | 58.9% |
| LMArena Coding | 1458 | — |
Agentic & Tool Use Not comparable
Grok 4.20 Multi-Agent: —, Step 5 Preview: —
| Benchmark | Grok 4.20 Multi-Agent | Step 5 Preview |
|---|---|---|
| LMArena Search | 1204 | — |
Reasoning Grok 4.20 Multi-Agent leads
Grok 4.20 Multi-Agent: 42.4 (#44), Step 5 Preview: 38.0 (#58)
| Benchmark | Grok 4.20 Multi-Agent | Step 5 Preview |
|---|---|---|
| NYT Connections (extended) | 89.6% | — |
| CritPt | — | 20.9% |
| LMArena Hard Prompts | 1448 | — |
Math Not comparable
Grok 4.20 Multi-Agent: 36.6 (#106), Step 5 Preview: —
| Benchmark | Grok 4.20 Multi-Agent | Step 5 Preview |
|---|---|---|
| LMArena Math | 1441 | — |
Knowledge Not comparable
Grok 4.20 Multi-Agent: 39.7 (#116), Step 5 Preview: —
| Benchmark | Grok 4.20 Multi-Agent | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1445 | — |
Multimodal Not comparable
Grok 4.20 Multi-Agent: 39.8 (#44), Step 5 Preview: —
| Benchmark | Grok 4.20 Multi-Agent | Step 5 Preview |
|---|---|---|
| LMArena Vision | 1259 | — |
Multilingual Not comparable
Grok 4.20 Multi-Agent: 54.6 (#40), Step 5 Preview: —
| Benchmark | Grok 4.20 Multi-Agent | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1440 | — |
| LMArena Chinese | 1475 | — |
| LMArena French | 1467 | — |
| LMArena German | 1456 | — |
| LMArena Japanese | 1405 | — |
| LMArena Korean | 1416 | — |
| LMArena Russian | 1457 | — |
| LMArena Spanish | 1447 | — |
Instruction Following Not comparable
Grok 4.20 Multi-Agent: 75.0 (#80), Step 5 Preview: —
| Benchmark | Grok 4.20 Multi-Agent | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1420 | — |
Long Context Not comparable
Grok 4.20 Multi-Agent: 43.7 (#84), Step 5 Preview: —
| Benchmark | Grok 4.20 Multi-Agent | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1430 | — |
Writing & Preference Not comparable
Grok 4.20 Multi-Agent: 64.1 (#57), Step 5 Preview: —
| Benchmark | Grok 4.20 Multi-Agent | Step 5 Preview |
|---|---|---|
| LMArena Text | 1450 | — |
| LMArena Creative Writing | 1435 | — |
| LMArena Multi-Turn | 1451 | — |
Frequently asked questions
Is Grok 4.20 Multi-Agent better than Step 5 Preview?
Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 43.8 on the Noometry Index.
Which is cheaper, Grok 4.20 Multi-Agent or Step 5 Preview?
Step 5 Preview is cheaper. It lists at $1 per million input tokens and $2.70 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.
Is Grok 4.20 Multi-Agent or Step 5 Preview better for coding?
Step 5 Preview scores higher on coding benchmarks: 50.6 versus 42.4 in the Noometry coding category.
Which has the bigger context window?
Step 5 Preview does, with 1.02M tokens against 1M.
How many benchmarks do Grok 4.20 Multi-Agent and Step 5 Preview share?
0 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Step 5 Preview has 3.