Noometry

Model comparison

Qwen3.5 27B vs Qwen3.5 Plus

Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 41.9 on the Noometry Index.

Last verified . 5 shared benchmarks.

Qwen3.5 27B Alibaba (Qwen)

41.9

Rank #127 Confirmed

Qwen3.5 Plus Alibaba (Qwen)

42.9

Rank #106 Confirmed

Summary

  • They share 5 benchmarks with published results for both. Qwen3.5 27B scores higher in 1 category and Qwen3.5 Plus in 3 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in math, where Qwen3.5 Plus leads 49.6 to 38.8.
  • Qwen3.5 27B is cheaper at $0.30 / $2.40 per million input/output tokens, against $0.40 / $2.40 for Qwen3.5 Plus.
  • Qwen3.5 Plus accepts more context: 1M tokens versus 262K.
  • Qwen3.5 27B has downloadable open weights; the other is API-only.

Side by side

Qwen3.5 27BQwen3.5 Plus
ProviderAlibaba (Qwen)Alibaba (Qwen)
Noometry Index41.942.9
Released2026-02-232026-02-16
WeightsOpenProprietary
Context window262K1M
Max output66K66K
Input $ / M tokens$0.30$0.40
Output $ / M tokens$2.40$2.40
Results tracked2815

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Category by category

Coding Not comparable

Qwen3.5 27B: 38.9 (#168), Qwen3.5 Plus: —

BenchmarkQwen3.5 27BQwen3.5 Plus
ALE-Bench349.45621.92
LMArena WebDev1358—
WeirdML39.5%—
LMArena Coding1427—

Agentic & Tool Use Not comparable

Qwen3.5 27B: —, Qwen3.5 Plus: —

BenchmarkQwen3.5 27BQwen3.5 Plus
Vending-Bench 2201.980.54

Reasoning Qwen3.5 Plus leads

Qwen3.5 27B: 27.5 (#117), Qwen3.5 Plus: 32.8 (#74)

BenchmarkQwen3.5 27BQwen3.5 Plus
DTBench82.4%80.5%
LMCA34%36.4%
NYT Connections (extended)47.9%—
Chess Puzzles—22%
Thematic Generalization45.5%—
LMArena Hard Prompts1414—
Mystery Game Puzzles—17%
Epoch Capabilities Index—146.78

Math Qwen3.5 Plus leads

Qwen3.5 27B: 38.8 (#127), Qwen3.5 Plus: 49.6 (#61)

BenchmarkQwen3.5 27BQwen3.5 Plus
MathArena Final-Answer Competitions56.7%—
OTIS Mock AIME 2024-2025—86.7%
LMArena Math1429—
FrontierMath (Feb 2025 set)—21%
FrontierMath Tier 4 (v1)—2.1%

Knowledge Qwen3.5 Plus leads

Qwen3.5 27B: 38.0 (#150), Qwen3.5 Plus: 46.0 (#83)

BenchmarkQwen3.5 27BQwen3.5 Plus
Vectara Hallucination Rate12.1%10.7%
GPQA Diamond—84.8%
SimpleQA Verified—25.4%
LMArena Expert1428—

Multimodal Not comparable

Qwen3.5 27B: 39.4 (#59), Qwen3.5 Plus: —

BenchmarkQwen3.5 27BQwen3.5 Plus
LMArena Vision1241—

Multilingual Not comparable

Qwen3.5 27B: 50.8 (#115), Qwen3.5 Plus: —

BenchmarkQwen3.5 27BQwen3.5 Plus
LMArena Non-English1390—
LMArena Chinese1478—
LMArena French1410—
LMArena German1393—
LMArena Japanese1345—
LMArena Korean1358—
LMArena Russian1390—
LMArena Spanish1407—

Instruction Following Not comparable

Qwen3.5 27B: 73.5 (#119), Qwen3.5 Plus: —

BenchmarkQwen3.5 27BQwen3.5 Plus
LMArena Instruction Following1393—

Long Context Too close to call

Qwen3.5 27B: 43.1 (#106), Qwen3.5 Plus: 43.0 (#113)

BenchmarkQwen3.5 27BQwen3.5 Plus
CL-bench—19.8%
CL-bench Life—12.4%
LMArena Longer Query1413—

Writing & Preference Not comparable

Qwen3.5 27B: 59.3 (#111), Qwen3.5 Plus: —

BenchmarkQwen3.5 27BQwen3.5 Plus
LMArena Text1409—
LMArena Creative Writing1362—
LMArena Multi-Turn1410—

Frequently asked questions

Is Qwen3.5 27B better than Qwen3.5 Plus?

Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 41.9 on the Noometry Index.

Which is cheaper, Qwen3.5 27B or Qwen3.5 Plus?

Qwen3.5 27B is cheaper. It lists at $0.30 per million input tokens and $2.40 per million output tokens; Qwen3.5 Plus lists at $0.40 and $2.40.

Which has the bigger context window?

Qwen3.5 Plus does, with 1M tokens against 262K.

How many benchmarks do Qwen3.5 27B and Qwen3.5 Plus share?

5 benchmarks have published results for both models. Qwen3.5 27B has 28 scored results on Noometry and Qwen3.5 Plus has 15.

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