AI benchmarks and leaderboards are different things
Learn the difference between a benchmark, an evaluation run and a leaderboard, and use each to answer the right question.
LLM Stats
LongBench v2
LongBench v2 is a benchmark designed to assess the ability of LLMs to handle long-context problems requiring deep understanding and reasoning across real-world multitasks. It consists of 503 challenging multiple-choice questions with contexts ranging from 8k to 2M words across six major task categories: single-document QA, multi-document QA, long in-context learning, long-dialogue history understanding, code repository understanding, and long structured data understanding.
Evaluation context and evidence
- Source
- LLM Stats
- Publisher
- Not recorded
- Benchmark release
- Not recorded
- Collected
- 2026-08-17
- Modality
- text
These are source-reported observations, not independent reruns by this site. Check the task version, evaluation protocol, unit and reporting date before comparing models. Results from different setups are not a universal ranking.
Original sources
Reported results 17
Shown in source observation order, not ranked. Dates retain the precision provided by the source.
| Model | Value | Unit | Protocol | Reported date and basis | Source |
|---|---|---|---|---|---|
| Qwen3.8 Max | 0.663 | Not recorded | Not recorded | 2026-08-02 · model_announcement | LLM Stats |
| Qwen3.5-397B-A17B | 0.632 | Not recorded | Not recorded | 2026-02-16 · model_announcement | LLM Stats |
| Qwen3.6 Plus | 0.62 | Not recorded | Not recorded | 2026-04-02 · model_announcement | LLM Stats |
| Nemotron 3 Ultra (550B A55B) | 0.619 | Not recorded | Not recorded | 2026-06-04 · model_announcement | LLM Stats |
| MiniMax M1 80K | 0.615 | Not recorded | Not recorded | 2025-06-16 · model_announcement | LLM Stats |
| MAI-Thinking-1 | 0.61 | Not recorded | Not recorded | 2026-06-02 · model_announcement | LLM Stats |
| Kimi K2.5 | 0.61 | Not recorded | Not recorded | 2026-01-27 · model_announcement | LLM Stats |
| MiniMax M1 40K | 0.61 | Not recorded | Not recorded | 2025-06-16 · model_announcement | LLM Stats |
| Qwen3.5-27B | 0.606 | Not recorded | Not recorded | 2026-02-24 · model_announcement | LLM Stats |
| MiMo-V2-Flash | 0.606 | Not recorded | Not recorded | 2025-12-16 · model_announcement | LLM Stats |
| Qwen3.5-122B-A10B | 0.602 | Not recorded | Not recorded | 2026-02-24 · model_announcement | LLM Stats |
| Qwen3.5-35B-A3B | 0.59 | Not recorded | Not recorded | 2026-02-24 · model_announcement | LLM Stats |
| Qwen3.5-9B | 0.552 | Not recorded | Not recorded | 2026-03-02 · model_announcement | LLM Stats |
| Qwen3.5-4B | 0.5 | Not recorded | Not recorded | 2026-03-02 · model_announcement | LLM Stats |
| DeepSeek-V3 | 0.487 | Not recorded | Not recorded | 2024-12-25 · model_announcement | LLM Stats |
| Qwen3.5-2B | 0.387 | Not recorded | Not recorded | 2026-03-02 · model_announcement | LLM Stats |
| Qwen3.5-0.8B | 0.261 | Not recorded | Not recorded | 2026-03-02 · model_announcement | LLM Stats |