Noometry

Model comparison

GPT-6 Luna vs Qwen3.5 Plus

GPT-6 Luna is the stronger model overall, scoring 53.3 to 42.9 on the Noometry Index.

Last verified . 9 shared benchmarks.

GPT-6 Luna OpenAI

53.3

Rank #36 Confirmed

Qwen3.5 Plus Alibaba (Qwen)

42.9

Rank #106 Confirmed

Summary

  • They share 9 benchmarks with published results for both. GPT-6 Luna scores higher in 4 categories and Qwen3.5 Plus in 0 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in math, where GPT-6 Luna leads 76.1 to 49.6.
  • The biggest single-benchmark swing is SimpleQA Verified: 41.4% for GPT-6 Luna and 25.4% for Qwen3.5 Plus.
  • GPT-6 Luna is cheaper at $0.10 / $0.50 per million input/output tokens, against $0.40 / $2.40 for Qwen3.5 Plus.
  • GPT-6 Luna accepts more context: 1.05M tokens versus 1M.

Side by side

GPT-6 LunaQwen3.5 Plus
ProviderOpenAIAlibaba (Qwen)
Noometry Index53.342.9
Released2026-09-222026-02-16
WeightsProprietaryProprietary
Context window1.05M1M
Max output128K66K
Input $ / M tokens$0.10$0.40
Output $ / M tokens$0.50$2.40
Results tracked4215

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Category by category

Coding Not comparable

GPT-6 Luna: 55.5 (#25), Qwen3.5 Plus: —

BenchmarkGPT-6 LunaQwen3.5 Plus
ALE-Bench1,577621.92
DeepSWE66.6%—
FrontierCode42.4%—
LMArena WebDev1581—
SciCode54.6%—
LMArena Coding1439—

Agentic & Tool Use Not comparable

GPT-6 Luna: 33.3 (#54), Qwen3.5 Plus: —

BenchmarkGPT-6 LunaQwen3.5 Plus
APEX-Agents44.3%—
GDP.pdf23%—
Vending-Bench 2—0.54

Reasoning GPT-6 Luna leads

GPT-6 Luna: 48.2 (#41), Qwen3.5 Plus: 32.8 (#74)

BenchmarkGPT-6 LunaQwen3.5 Plus
Chess Puzzles31%22%
Mystery Game Puzzles7%17%
DTBench90.1%80.5%
LMCA44.5%36.4%
Epoch Capabilities Index156.28146.78
ARC-AGI-259.3%—
NYT Connections (extended)68.7%—
ARC-AGI-186.7%—
CritPt19.4%—
LMArena Hard Prompts1411—

Math GPT-6 Luna leads

GPT-6 Luna: 76.1 (#15), Qwen3.5 Plus: 49.6 (#61)

BenchmarkGPT-6 LunaQwen3.5 Plus
OTIS Mock AIME 2024-202598.9%86.7%
FrontierMath (Tiers 1-3)78.9%—
FrontierMath Tier 456.1%—
ProofBench64%—
LMArena Math1416—
FrontierMath (Feb 2025 set)—21%
FrontierMath Tier 4 (v1)—2.1%

Knowledge GPT-6 Luna leads

GPT-6 Luna: 57.0 (#41), Qwen3.5 Plus: 46.0 (#83)

BenchmarkGPT-6 LunaQwen3.5 Plus
GPQA Diamond90.5%84.8%
SimpleQA Verified41.4%25.4%
Vectara Hallucination Rate—10.7%
LMArena Expert1444—

Multimodal Not comparable

GPT-6 Luna: 42.4 (#30), Qwen3.5 Plus: —

BenchmarkGPT-6 LunaQwen3.5 Plus
LMArena Vision1217—
Blueprint-Bench 231.2%—
Furniture Assembly44.2%—

Multilingual Not comparable

GPT-6 Luna: 50.5 (#117), Qwen3.5 Plus: —

BenchmarkGPT-6 LunaQwen3.5 Plus
LMArena Non-English1386—
LMArena Chinese1433—
LMArena French1420—
LMArena German1369—
LMArena Japanese1369—
LMArena Korean1360—
LMArena Russian1394—
LMArena Spanish1393—

Instruction Following Not comparable

GPT-6 Luna: 74.3 (#99), Qwen3.5 Plus: —

BenchmarkGPT-6 LunaQwen3.5 Plus
LMArena Instruction Following1409—

Long Context Too close to call

GPT-6 Luna: 43.0 (#111), Qwen3.5 Plus: 43.0 (#113)

BenchmarkGPT-6 LunaQwen3.5 Plus
CL-bench—19.8%
CL-bench Life—12.4%
LMArena Longer Query1409—

Writing & Preference Not comparable

GPT-6 Luna: 58.3 (#119), Qwen3.5 Plus: —

BenchmarkGPT-6 LunaQwen3.5 Plus
LMArena Text1391—
LMArena Creative Writing1363—
LMArena Multi-Turn1396—

Frequently asked questions

Is GPT-6 Luna better than Qwen3.5 Plus?

GPT-6 Luna is the stronger model overall, scoring 53.3 to 42.9 on the Noometry Index.

Which is cheaper, GPT-6 Luna or Qwen3.5 Plus?

GPT-6 Luna is cheaper. It lists at $0.10 per million input tokens and $0.50 per million output tokens; Qwen3.5 Plus lists at $0.40 and $2.40.

Which has the bigger context window?

GPT-6 Luna does, with 1.05M tokens against 1M.

How many benchmarks do GPT-6 Luna and Qwen3.5 Plus share?

9 benchmarks have published results for both models. GPT-6 Luna has 42 scored results on Noometry and Qwen3.5 Plus has 15.

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