MRCR512k-1M

The same buried-detail retrieval test run on even longer inputs, from roughly 512k up to a million tokens. Scores usually slip as the document grows, so read it against the shorter span above. Higher is better.

Muse Spark 1.3 by Meta holds the best MRCR (512k-1M) result among tracked models, at 98.1% (released Sep 2 2026). Higher scores are better on this benchmark.

1. Muse Spark 1.3 (Meta) — 98.1%.

1 tracked model has a published MRCR (512k-1M) score. Scores are the figures reported by each lab at that model's release, so this page is a record of results over time rather than a re-run leaderboard.