BenchLeader

Qwen3.5 0.8B

Reasoning effort

Qwen3.5 0.8B is an Alibaba open-weights reasoning model, released 2 Mar 2026. Its best configuration (thinking reasoning effort) ranks #756 of 785 on the BenchLeader Index at 36.0 ±7.6, in the lower half. The ± is the point: 222 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 reasoning (41) and lowest in multimodal (8). It has been measured at 2 reasoning-effort settings; this summary describes the best-scoring one, and the tabs above switch between them. Last measured 2 Mar 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
262k
Full answer
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Cost per run
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Released
2 Mar 2026
How it scores by categoryDashed line = average model (50). One step of 15 = one standard deviation.
  1. Overall index36
  2. Reasoning41
  3. Agents & tools34
  4. Knowledge37
  5. Instruction following27
  6. Multimodal8
  7. Long context28
  8. Composite36

Reasoning-effort configurations

The same model behaves differently depending on how much it is allowed to think. Each row is one setting, scored only on the benchmarks that were run at that setting. “Not stated” collects results from publishers that did not say which setting they used; for a reasoning model that is usually its thinking mode, but we do not assume it. Pick a setting here or at the top of the page to see its price, speed and category scores.

EffortIndexRankSpeedFirst answerChat reply costCategories
no reasoning34.3#773–––Agents & tools 34 · Composite 36 · Instruction following 27 · Knowledge 22 · Long context 28 · Multimodal 8 · Reasoning 41
thinkingbest36.0#756–––Agents & tools 34 · Composite 36 · Instruction following 27 · Knowledge 37 · Long context 28 · Multimodal 8 · Reasoning 41

How its index has moved

9 Sept 2026 to 21 Oct 2026
263544
  • thinking
  • no reasoning

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

Benchmarkno reasoningthinkingSource
GPQA Diamond (AA)not in index23.6%#54911.1%#558Artificial Analysis
Humanity's Last Exam (AA)not in index5.1%#4461.1%#615Artificial Analysis
CritPt0.0%#3150.0%#315Artificial Analysis

Coding

Benchmarkno reasoningthinkingSource
Terminal-Bench 2.1 (AA)not in index0.4%#2280.0%#232Artificial Analysis

Agents & tools

Benchmarkno reasoningthinkingSource
Terminal-Bench Hard0.0%#3620.0%#362Artificial Analysis
τ²-Bench Telecom (AA)not in index65.2%#16947.7%#202Artificial Analysis
GDPval-AA v2.1not in index0.0%#1240.0%#124Artificial Analysis

Knowledge

Benchmarkno reasoningthinkingSource
AA-Omniscience-88.6#552-54.5#430Artificial Analysis
AA-Omniscience: accuracynot in index5.0%#5434.2%#546Artificial Analysis
AA-Omniscience: non-hallucinationnot in index1.5%#55238.6%#168Artificial Analysis

Instruction following

Benchmarkno reasoningthinkingSource
IFBench21.6%#40921.5%#410Artificial Analysis

Multimodal

Benchmarkno reasoningthinkingSource
MMMU-Pro25.7%#28025.8%#279Artificial Analysis

Long context

Benchmarkno reasoningthinkingSource
AA-LCR8.0%#4759.0%#470Artificial Analysis

Composite

Benchmarkno reasoningthinkingSource
AA Intelligence Index v4.3.25.4#5826.1#540Artificial Analysis

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Questions people ask

What are Qwen3.5 0.8B's benchmark scores?
As of 25 Oct 2026, Qwen3.5 0.8B (thinking effort) scores 36.0 ±7.6 on the BenchLeader Index, strongest in reasoning (41) and weakest in multimodal (8). That rests on 7 independent benchmark results, and every score on this page links to its publisher.
How does Qwen3.5 0.8B rank?
Qwen3.5 0.8B (thinking effort) is #756 of 785 ranked configurations on 25 Oct 2026. 222 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 Qwen3.5 0.8B released?
Alibaba released Qwen3.5 0.8B on 2 Mar 2026. BenchLeader has results for it at 2 reasoning-effort settings.

Data as of 25 Oct 2026. Compare these configurations.

Cite as: BenchLeader, “Qwen3.5 0.8B: benchmarks, pricing, speed and rank”, data as of 25 Oct 2026, https://www.benchleader.com/models/qwen3-5-0-8b.