Which AI model scores highest on MRCR?

Muse Spark 1.3 by Meta holds the best MRCR (256k-512k) result among tracked models, at 98.5% (released Sep 2 2026). Higher scores are better on this benchmark.

What are the top 1 models on MRCR?

1. Muse Spark 1.3 (Meta) — 98.5%.

How many models have a published MRCR score?

1 tracked model has a published MRCR (256k-512k) 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.

Long context

MRCR256k-512k

Tests whether the AI can find specific details buried inside a very long document, here across inputs of roughly 256k to 512k tokens — several books' worth of text. Higher is better.

256k-512k 512k-1M

Rankings

Higher is better

Muse Spark 1.3

98.5%

MRCR — frequently asked questions

What is MRCR?: Tests whether the AI can find specific details buried inside a very long document, here across inputs of roughly 256k to 512k tokens — several books' worth of text. Higher is better.
Which AI model scores highest on MRCR?: Muse Spark 1.3 by Meta holds the best MRCR (256k-512k) result among tracked models, at 98.5% (released Sep 2 2026). Higher scores are better on this benchmark.
What are the top 1 models on MRCR?: 1. Muse Spark 1.3 (Meta) — 98.5%.
How many models have a published MRCR score?: 1 tracked model has a published MRCR (256k-512k) 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.