Step 5 Preview scores 54.9 on the Respan Index (#12), ahead of Claude Opus 4.8 at 52.2 (#16). Step 5 Preview leads on 3 of the 5 benchmarks both report. Step 5 Preview is 7.0x cheaper per token at list price.
* Estimated: no published scores in that category. How the Respan Index works
| LMArena WebDev (LMArena) |
| 1556 |
| 1570 |
Higher is better. Each score links to where it was published.