GPT-6 Astra scores 70.5 on the Respan Index (#2), ahead of Gemini 4 Argon at 70.3 (#3). GPT-6 Astra leads on 5 of the 8 benchmarks both report. Gemini 4 Argon is 5.0x cheaper per token at list price.
* Estimated: no published scores in that category. How the Respan Index works
| 13718.16 |
| 15514.7 |
| LMArena Agent (LMArena) | 0.0757 | 0.1227 |
| LMArena Elo | 1525 | 1477 |
| LMArena WebDev (LMArena) | 1680 | 1788 |
Higher is better. Each score links to where it was published.