Step 5 Preview scores 54.9 on the Respan Index (#12), ahead of Grok 4.6 at 51.0 (#19). Grok 4.6 leads on 4 of the 5 benchmarks both report. Step 5 Preview is 2.1x cheaper per token at list price. Step 5 Preview has the larger context window (1M tokens).
* Estimated: no published scores in that category. How the Respan Index works
| LMArena WebDev (LMArena) |
| 1620 |
| 1570 |
Higher is better. Each score links to where it was published.