MRCR v2 (8-needle)
MRCR v2 (8-needle) is a variant of the Multi-Round Coreference Resolution benchmark that includes 8 needle items to retrieve from long contexts. This tests models' ability to simultaneously track and reason about multiple pieces of information across extended conversations.
Claude Opus 4.6 from Anthropic currently leads the MRCR v2 (8-needle) leaderboard with a score of 0.930 across 10 evaluated AI models.
Claude Opus 4.6 leads with 93.0%, followed by 
GPT-5.5 at 74.0% and 
Gemini 3.1 Flash-Lite at 60.1%.
Progress Over Time
Interactive timeline showing model performance evolution on MRCR v2 (8-needle)
MRCR v2 (8-needle) Leaderboard
| Context | Cost | License | ||||
|---|---|---|---|---|---|---|
| 1 | Anthropic | — | 1.0M | $5.00 / $25.00 | ||
| 2 | OpenAI | — | 1.1M | $5.00 / $30.00 | ||
| 3 | Google | — | 1.0M | $0.25 / $1.50 | ||
| 4 | OpenAI | — | 400K | $0.75 / $4.50 | ||
| 5 | OpenAI | — | 400K | $0.20 / $1.25 | ||
| 6 | Google | — | 1.0M | $1.50 / $9.00 | ||
| 7 | Google | — | — | — | ||
| 7 | Google | — | 1.0M | $2.50 / $15.00 | ||
| 9 | Google | — | 1.0M | $0.50 / $3.00 | ||
| 10 | — | — | — |
FAQ
Common questions about MRCR v2 (8-needle).
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