Add gemini-embedding-2 evaluation

#3
by Seithx - opened

Adds gemini-embedding-2 (768d) to the leaderboard -- not previously evaluated.

gemini-embedding-2 (768d) underperforms gemini-embedding-001 (768d) on this benchmark by 3.3 percentage points on recall@1.

Model recall@1 recall@5 recall@10 MRR
gemini-embedding-001 (768d, this submission, reproduction) 0.9353 0.9873 0.9903 0.9588
gemini-embedding-2 (768d) 0.9021 0.9593 0.9693 0.9290

I also submitted my own gemini-embedding-001 (768d) row alongside as a reproduction check -- it matches the existing leaderboard entry within +0.0003 on recall@1. Feel free to drop that row if redundant; the embedding-2 datapoint is the contribution.

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Seithx changed pull request title from Add gemini-embedding-001 (reproduction) + gemini-embedding-2 evaluations to Add gemini-embedding-2 evaluation
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