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NanbeigeOpen weightsReasoning modelCompare with another model

Nanbeige4.1-3B

Nanbeige4.1-3B is a Nanbeige open-weights reasoning model, released 11 Feb 2026. Its best configuration ranks #649 of 785 on the BenchLeader Index at 40.9 ±5.1, in the lower half. The ± is the point: 290 other configurations score within that range, so they and this one cannot be told apart on quality alone — price and speed are what separate them. It scores highest in knowledge (42) and lowest in long context (23). Last measured 11 Feb 2026.stale: no new result in six months

Blended price
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Output speed
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First answer
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Context
256k
Full answer
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Cost per run
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Released
11 Feb 2026
How it scores by categoryDashed line = average model (50). One step of 15 = one standard deviation.
  1. Overall index41
  2. Reasoning41
  3. Agents & tools34
  4. Knowledge42
  5. Instruction following39
  6. Long context23
  7. Composite39

How its index has moved

9 Sept 2026 to 21 Oct 2026
364147

The index is recomputed from scratch every day, so a line moves when a new benchmark result lands, when a publisher revises a score, or when the models it is normalised against change. Early movement usually means the score is still settling.

Benchmark results

See all LLM benchmarks. One column per reasoning effort. Rank is among every configuration of every model on that benchmark. Hover a score for the run it came from.

Reasoning

Benchmarknot statedSource
GPQA Diamond (AA)not in index85.0%#130Artificial Analysis
Humanity's Last Exam (AA)not in index10.9%#307Artificial Analysis
CritPt0.0%#315Artificial Analysis

Coding

Benchmarknot statedSource
Terminal-Bench 2.1 (AA)not in index1.1%#224Artificial Analysis

Agents & tools

Instruction following

Benchmarknot statedSource
IFBench35.4%#309Artificial Analysis

Long context

Benchmarknot statedSource
AA-LCR0.0%#493Artificial Analysis

Composite

Benchmarknot statedSource
AA Intelligence Index v4.3.28.4#436Artificial Analysis

New this month

See also

Questions people ask

What are Nanbeige4.1-3B's benchmark scores?
As of 25 Oct 2026, Nanbeige4.1-3B scores 40.9 ±5.1 on the BenchLeader Index, strongest in knowledge (42) and weakest in long context (23). That rests on 6 independent benchmark results, and every score on this page links to its publisher.
How does Nanbeige4.1-3B rank?
Nanbeige4.1-3B is #649 of 785 ranked configurations on 25 Oct 2026. 290 other configurations score within its margin, so the exact position matters less than the band. The leader is Claude Opus 5.5 (max effort) at 72.6.
When was Nanbeige4.1-3B released?
Nanbeige released Nanbeige4.1-3B on 11 Feb 2026.

Data as of 25 Oct 2026. Compare with another model.

Cite as: BenchLeader, “Nanbeige4.1-3B: benchmarks, pricing, speed and rank”, data as of 25 Oct 2026, https://www.benchleader.com/models/nanbeige4-1-3b.