Noometry

Model comparison

Claude Opus 5.5 vs Qwen3.6 Flash

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 38.8 on the Noometry Index. Qwen3.6 Flash costs 19× less per token, which makes it the better buy when Claude Opus 5.5's lead doesn't matter for your workload.

Last verified . 9 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

Qwen3.6 Flash Alibaba (Qwen)

38.8

Rank #182 Confirmed

Summary

  • They share 9 benchmarks with published results for both. Claude Opus 5.5 scores higher in 3 categories and Qwen3.6 Flash in 0 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 5.5 leads 91.8 to 39.0.
  • The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 91.2% for Claude Opus 5.5 and 22.5% for Qwen3.6 Flash.
  • Qwen3.6 Flash is cheaper at $0.19 / $1.13 per million input/output tokens, against $4 / $20 for Claude Opus 5.5.

Side by side

Claude Opus 5.5Qwen3.6 Flash
ProviderAnthropicAlibaba (Qwen)
Noometry Index68.638.8
Released2026-09-222026-04-27
WeightsProprietaryProprietary
Context window1M1M
Max output128K66K
Input $ / M tokens$4$0.19
Output $ / M tokens$20$1.13
Results tracked4413

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Category by category

Coding Not comparable

Claude Opus 5.5: 71.9 (#3), Qwen3.6 Flash: —

BenchmarkClaude Opus 5.5Qwen3.6 Flash
ALE-Bench2,147326.4
FrontierCode54.6%—
CursorBench57.8%—
LMArena WebDev1813—
FrontierSWE62.3%—
SciCode66.9%—
LMArena Coding1547—
MirrorCode77.4%—

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#15), Qwen3.6 Flash: —

BenchmarkClaude Opus 5.5Qwen3.6 Flash
APEX-Agents73.5%—
GDP.pdf30.6%—
Vending-Bench 29,235—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 80.2 (#3), Qwen3.6 Flash: 29.0 (#96)

BenchmarkClaude Opus 5.5Qwen3.6 Flash
Mystery Game Puzzles71%18%
DTBench98.9%77.1%
LMCA68.2%31%
Epoch Capabilities Index167.33143.26
ARC-AGI-293.3%—
SimpleBench—35.2%
NYT Connections (extended)88.5%—
ARC-AGI-198.5%—
CritPt31.7%—
Chess Puzzles—20%
EBR-Bench71.4%—
LMArena Hard Prompts1535—

Math Claude Opus 5.5 leads

Claude Opus 5.5: 91.8 (#3), Qwen3.6 Flash: 39.0 (#117)

BenchmarkClaude Opus 5.5Qwen3.6 Flash
FrontierMath (Tiers 1-3)91.2%22.5%
OTIS Mock AIME 2024-2025100%84.4%
FrontierMath Tier 495%—
ProofBench100%—
LMArena Math1506—
FrontierMath (Feb 2025 set)—10.3%
FrontierMath Erdős2.9%—
FrontierMath Tier 4 (v1)—0%

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.4 (#10), Qwen3.6 Flash: 42.1 (#100)

BenchmarkClaude Opus 5.5Qwen3.6 Flash
GPQA Diamond90.6%83.3%
SimpleQA Verified72.2%15.9%
LMArena Expert1547—

Multimodal Not comparable

Claude Opus 5.5: 57.8 (#1), Qwen3.6 Flash: —

BenchmarkClaude Opus 5.5Qwen3.6 Flash
LMArena Vision1321—
Blueprint-Bench 251.2%—
Furniture Assembly83.3%—

Multilingual Not comparable

Claude Opus 5.5: 59.1 (#2), Qwen3.6 Flash: —

BenchmarkClaude Opus 5.5Qwen3.6 Flash
LMArena Non-English1507—
LMArena Chinese1588—
LMArena French1514—
LMArena Russian1520—
LMArena Spanish1507—

Instruction Following Not comparable

Claude Opus 5.5: 80.0 (#3), Qwen3.6 Flash: —

BenchmarkClaude Opus 5.5Qwen3.6 Flash
LMArena Instruction Following1537—

Long Context Not comparable

Claude Opus 5.5: 47.1 (#19), Qwen3.6 Flash: —

BenchmarkClaude Opus 5.5Qwen3.6 Flash
LMArena Longer Query1532—

Writing & Preference Not comparable

Claude Opus 5.5: 78.2 (#3), Qwen3.6 Flash: —

BenchmarkClaude Opus 5.5Qwen3.6 Flash
LMArena Text1515—
LMArena Creative Writing1533—
EQ-Bench Creative Writing2050—
LMArena Multi-Turn1499—

Frequently asked questions

Is Claude Opus 5.5 better than Qwen3.6 Flash?

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 38.8 on the Noometry Index. Qwen3.6 Flash costs 19× less per token, which makes it the better buy when Claude Opus 5.5's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 5.5 or Qwen3.6 Flash?

Qwen3.6 Flash is cheaper. It lists at $0.19 per million input tokens and $1.13 per million output tokens; Claude Opus 5.5 lists at $4 and $20.

Which has the bigger context window?

Both accept 1M tokens.

How many benchmarks do Claude Opus 5.5 and Qwen3.6 Flash share?

9 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and Qwen3.6 Flash has 13.

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