Claude Sonnet 4.6
VS
Qwen3.5 Plus 2026-02-15
Claude Sonnet 4.6 vs Qwen3.5 Plus 2026-02-15: which wins at real work?
22 task areas · same graded test runs · rank comparison only, so 0–100 and Elo collections never mix raw scores.
Claude Sonnet 4.6 wins 15 of 22 task areas we tested; Qwen3.5 Plus 2026-02-15 takes 7. Qwen3.5 Plus 2026-02-15 costs 9.9× less per token ($1.82 vs $18 per 1M).
Qwen3.5 Plus 2026-02-15 costs 9.9× less per token ($1.82 vs $18 per 1M).
Task by task
| Task area | Claude Sonnet 4.6 | Qwen3.5 Plus 2026-02-15 | Winner |
|---|---|---|---|
| Structured Output |
#105
/ 113
Usable
|
#18
/ 113
Excellent
|
Qwen3.5 Plus 2026-02-15 |
| RAG, Safety & Grounding |
#73
/ 113
Excellent
|
#7
/ 113
Excellent
|
Qwen3.5 Plus 2026-02-15 |
| Executive Assistant |
#1
/ 112
Strong
|
#61
/ 112
Strong
|
Claude Sonnet 4.6 |
| Creative & Comedy | #19 / 110 | #71 / 110 | Claude Sonnet 4.6 |
| Customer Support |
#62
/ 113
Strong
|
#18
/ 113
Strong
|
Qwen3.5 Plus 2026-02-15 |
| Coding |
#29
/ 115
Strong
|
#71
/ 115
Strong
|
Claude Sonnet 4.6 |
| Research & Competitive Analysis |
#35
/ 110
Strong
|
#73
/ 110
Usable
|
Claude Sonnet 4.6 |
| Investor & Pitch |
#4
/ 66
Strong
|
#36
/ 66
Usable
|
Claude Sonnet 4.6 |
| Landing Pages |
#5
/ 72
Strong
|
#36
/ 72
Strong
|
Claude Sonnet 4.6 |
| AI Strategy |
#3
/ 126
Strong
|
#32
/ 126
Strong
|
Claude Sonnet 4.6 |
| Chef / Home Cooking |
#20
/ 126
Usable
|
#40
/ 126
Usable
|
Claude Sonnet 4.6 |
| Data & Analytics |
#6
/ 110
Excellent
|
#26
/ 110
Excellent
|
Claude Sonnet 4.6 |
| Frontend & Landing Pages |
#23
/ 109
Needs editing
|
#3
/ 109
Usable
|
Qwen3.5 Plus 2026-02-15 |
| Knowledge & Docs |
#35
/ 110
Strong
|
#51
/ 110
Usable
|
Claude Sonnet 4.6 |
| Content & Brand |
#31
/ 124
Strong
|
#45
/ 124
Strong
|
Claude Sonnet 4.6 |
| Sales |
#13
/ 110
Strong
|
#27
/ 110
Strong
|
Claude Sonnet 4.6 |
| Legal & HR |
#3
/ 110
Excellent
|
#13
/ 110
Excellent
|
Claude Sonnet 4.6 |
| Summarization & Meeting Notes |
#37
/ 110
Excellent
|
#46
/ 110
Excellent
|
Claude Sonnet 4.6 |
| Product & Project Management |
#48
/ 110
Strong
|
#40
/ 110
Strong
|
Qwen3.5 Plus 2026-02-15 |
| Presentations & Decks |
#35
/ 110
Excellent
|
#40
/ 110
Excellent
|
Claude Sonnet 4.6 |
| Training & Education |
#9
/ 110
Excellent
|
#6
/ 110
Excellent
|
Qwen3.5 Plus 2026-02-15 |
| Translation & Localization |
#13
/ 110
Excellent
|
#10
/ 110
Excellent
|
Qwen3.5 Plus 2026-02-15 |
Rank = position among every model config we tested in that task area (lower is better). Sorted by biggest gap first.
Frequently asked
Is Claude Sonnet 4.6 better than Qwen3.5 Plus 2026-02-15?
Across 22 task areas we benchmarked, Claude Sonnet 4.6 ranks higher in 15 and Qwen3.5 Plus 2026-02-15 in 7.
Which is cheaper, Claude Sonnet 4.6 or Qwen3.5 Plus 2026-02-15?
Qwen3.5 Plus 2026-02-15 costs 9.9× less per token ($1.82 vs $18 per 1M).
What is Claude Sonnet 4.6 better at?
Claude Sonnet 4.6 out-ranks Qwen3.5 Plus 2026-02-15 at Executive Assistant, Creative & Comedy, Coding.
What is Qwen3.5 Plus 2026-02-15 better at?
Qwen3.5 Plus 2026-02-15 out-ranks Claude Sonnet 4.6 at Structured Output, RAG, Safety & Grounding, Customer Support.
More comparisons
This page is Spring Prompt, running in public
We just did this for every model. Do it for your prompt.
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Prompt × model results
12 test cases · 3 evals