Model comparison

Claude Sonnet 5.5 vs Qwen3.7 Flash

Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 39.9 on the Noometry Index. Qwen3.7 Flash costs 73× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.

Last verified October 10, 2026. 6 shared benchmarks.

Claude Sonnet 5.5 Anthropic

61.9

Rank #10 Confirmed

Qwen3.7 Flash

Alibaba (Qwen)

39.9

Rank #156 Confirmed

Summary

They share 6 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 3 categories and Qwen3.7 Flash in 0 categories; 3 gaps are clear of the uncertainty.
The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 38.3.
The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 88.8% for Claude Sonnet 5.5 and 19.3% for Qwen3.7 Flash.
Qwen3.7 Flash is cheaper at $0.03 / $0.13 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.

Side by side

Claude Sonnet 5.5 and Qwen3.7 Flash specifications
	Claude Sonnet 5.5	Qwen3.7 Flash
Provider	Anthropic	Alibaba (Qwen)
Noometry Index	61.9	39.9
Released	2026-09-28	2026-07-15
Weights	Proprietary	Proprietary
Context window	1M	1M
Max output	128K	131K
Input $ / M tokens	$2	$0.03
Output $ / M tokens	$10	$0.13
Results tracked	32	7

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Category by category

Coding Not comparable

Claude Sonnet 5.5: 67.3 (#6), Qwen3.7 Flash: —

Coding benchmarks
Benchmark	Claude Sonnet 5.5	Qwen3.7 Flash
FrontierCode	52.1%	—
CursorBench	55.5%	—
LMArena WebDev	1774	—
FrontierSWE	61.9%	—
SciCode	61%	—
LMArena Coding	1513	—
ALE-Bench	1,819	—

Agentic & Tool Use Not comparable

Claude Sonnet 5.5: 45.0 (#16), Qwen3.7 Flash: —

Agentic & Tool Use benchmarks
Benchmark	Claude Sonnet 5.5	Qwen3.7 Flash
APEX-Agents	75.5%	—

Reasoning Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 54.0 (#28), Qwen3.7 Flash: 28.2 (#108)

Reasoning benchmarks
Benchmark	Claude Sonnet 5.5	Qwen3.7 Flash
NYT Connections (extended)	80.5%	43.8%
Mystery Game Puzzles	65%	15%
Epoch Capabilities Index	165.03	144.64
CritPt	31.4%	—
Chess Puzzles	—	23%
LMArena Hard Prompts	1495	—

Math Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 87.9 (#6), Qwen3.7 Flash: 38.3 (#140)

Math benchmarks
Benchmark	Claude Sonnet 5.5	Qwen3.7 Flash
FrontierMath (Tiers 1-3)	88.8%	19.3%
OTIS Mock AIME 2024-2025	100%	86.7%
FrontierMath Tier 4	80.5%	—
ProofBench	100%	—
LMArena Math	1510	—
FrontierMath Erdős	2.9%	—

Knowledge Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 66.0 (#12), Qwen3.7 Flash: 48.9 (#75)

Knowledge benchmarks
Benchmark	Claude Sonnet 5.5	Qwen3.7 Flash
GPQA Diamond	95.6%	82.3%
SimpleQA Verified	46.5%	—
LMArena Expert	1540	—

Multimodal Not comparable

Claude Sonnet 5.5: 51.5 (#6), Qwen3.7 Flash: —

Multimodal benchmarks
Benchmark	Claude Sonnet 5.5	Qwen3.7 Flash
LMArena Vision	1289	—
Furniture Assembly	75%	—

Multilingual Not comparable

Claude Sonnet 5.5: 55.3 (#30), Qwen3.7 Flash: —

Multilingual benchmarks
Benchmark	Claude Sonnet 5.5	Qwen3.7 Flash
LMArena Non-English	1452	—
LMArena Chinese	1522	—
LMArena Russian	1451	—

Instruction Following Not comparable

Claude Sonnet 5.5: 78.3 (#11), Qwen3.7 Flash: —

Instruction Following benchmarks
Benchmark	Claude Sonnet 5.5	Qwen3.7 Flash
LMArena Instruction Following	1495	—

Long Context Not comparable

Claude Sonnet 5.5: 45.9 (#28), Qwen3.7 Flash: —

Long Context benchmarks
Benchmark	Claude Sonnet 5.5	Qwen3.7 Flash
LMArena Longer Query	1498	—

Writing & Preference Not comparable

Claude Sonnet 5.5: 66.0 (#40), Qwen3.7 Flash: —

Writing & Preference benchmarks
Benchmark	Claude Sonnet 5.5	Qwen3.7 Flash
LMArena Text	1471	—
LMArena Creative Writing	1465	—
LMArena Multi-Turn	1474	—

Frequently asked questions

Is Claude Sonnet 5.5 better than Qwen3.7 Flash?

Which is cheaper, Claude Sonnet 5.5 or Qwen3.7 Flash?

Qwen3.7 Flash is cheaper. It lists at $0.03 per million input tokens and $0.13 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.

Which has the bigger context window?

Both accept 1M tokens.

How many benchmarks do Claude Sonnet 5.5 and Qwen3.7 Flash share?

6 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Qwen3.7 Flash has 7.