OpenAI MRCR v2 8-needle 256K-512K
MRCR v2 slice focused on retrieval across 256K-512K-token contexts.
2 models
Higher is better.
- 1GPT-6 AstraOpenAI100.0
- 2Muse Spark 1.3Meta98.5
About this benchmark
- Metric
- Mean sequence-matcher ratio
- Tasks
- 100 eight-needle retrieval examples
- Authors
- Meta Superintelligence Labs (2026)
Scores are as reported by model developers or evaluators and may use different settings (for example reasoning effort or tools). Compare with care.