GPT-5 nano scores 17.3 on the Respan Index (#109), ahead of Gemini 2.5 Flash at 17.2 (#110). Gemini 2.5 Flash leads on 4 of the 6 benchmarks both report. GPT-5 nano is 6.2x cheaper per token at list price. Gemini 2.5 Flash has the larger context window (1.0M tokens).
* Estimated: no published scores in that category. How the Respan Index works
| 69.4% |
| SWE-bench Verified | 48.9% | 54.7% |
Higher is better. Each score links to where it was published.