Compare / gemini-3-pro-preview vs GPT-5.5
gemini-3-pro-preview vs GPT-5.5
7 results from 4 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | gemini-3-pro-preview | GPT-5.5 |
|---|---|---|---|
| Remote Labor Indexreported | Projects done to client standard% of projects | 1.2% | 6.2% |
| UGI Leaderboardreported | Requested-length error% off the requested word count | 33.0% | 13.0% |
| UGI Leaderboardreported | Style adherencescore from 0 to 1 | 0.37 | 0.41 |
| UGI Leaderboardreported | Writing scorescore out of 100 | 66.7 | 69.7 |
| Vectara Hallucination Leaderboardreported | Answer rate% of documents | 99.4% | 100.0% |
| Vectara Hallucination Leaderboardreported | Hallucination rate% of summaries | 13.6% | 9.3% |
| Vending-Bench 2reported | Money after a yearUS dollars | $5,478.16 | $7,523.84 |
Bold green marks the better value on that metric. Where a source reports ranges that overlap, the difference may not be meaningful; see the benchmark page for ranges.