Compare / Qwen3.5-35B-A3B vs Claude Sonnet 4

Qwen3.5-35B-A3B vs Claude Sonnet 4

Which is cheaper, which is more capable, and which does better at each kind of work, from 21 results on 4 sources that measured both models.

AlibabaQwen3.5-35B-A3B Released 24 Feb 2026 · $0.16 in · $1.30 out
AnthropicClaude Sonnet 4 Released 22 May 2025 · $3.00 in · $15.00 out
Qwen3.5-35B-A3B wins 83 too close to callClaude Sonnet 4 wins 10

Of the 21 results both models have, the better value on each. Results whose reported ranges overlap are too close to call.

Results as of 9 October 2026 (catalogue release 2026-10-09-dd620e778ac5). See also Alibaba vs Anthropic, every model from both labs.

Qwen3.5-35B-A3B or Claude Sonnet 4? The short answer

They score about the same, so pick Qwen3.5-35B-A3B: it costs 13 times less per token.

  • Qwen3.5-35B-A3B is cheaper: $0.45 against $6.00 per million tokens, 13 times less.
  • They score about the same on the Artificial Analysis Intelligence Index (19.3 and 18.9).
  • Qwen3.5-35B-A3B is newer: released 24 Feb 2026, against 22 May 2025 for Claude Sonnet 4.
  • On third-party benchmarks, on the results both models have: Qwen3.5-35B-A3B does better for reasoning and knowledge; Claude Sonnet 4 for writing and sticking to the facts.

Head to head

19.3
Intelligence Index
18.9
$0.45
Price per million tokens, blendedlower is better
$6.00
262,144
Context window, tokens
200,000

Every fact side by side

Qwen3.5-35B-A3BClaude Sonnet 4
Price per million tokens$0.16 in · $1.30 out$3.00 in · $15.00 out
Blended (3 in : 1 out)$0.45$6.00
Cheapest host, blended$0.25 (Darkbloom, FP4)$6.00 (Amazon Bedrock)
Intelligence Index19.318.9
Spring Prompt overall––
Output speed, tokens a second––
Context window262,144 tokens200,000 tokens
Released24 Feb 2026 (newer)22 May 2025
WeightsOpenClosed
Developer based inChinathe US

Prices are the developer's list price where we have read it, otherwise the typical host on OpenRouter; see every model's price. Intelligence and speed from Artificial Analysis.

Which is better for what

Each model's rank among the models on sale today, for each kind of work, from our own benchmarks and licensed sources. Further right is better; the better rank is in green.

Agents and tool useMulti-step tasks with tools: support desks, coding agents, function calls 116 of 164 83 of 164
Reasoning and knowledgeHard questions across science, maths and general knowledge 92 of 198 115 of 198
WritingWhat people prefer in blind comparisons, and judged writing quality 108 of 188 68 of 188
Sticking to the factsSummarising without inventing things, and factual answers 112 of 152 88 of 152

Every shared result

Each model's best result on every measure both have, grouped by benchmark, with the setting that produced it. Under each measure, every model that benchmark has measured is a grey tick, best to the right, so you can see where the two sit in the field. The headline measures of each benchmark come first; the rest are under "Show all". Green marks the better value; where a source reports ranges that overlap, neither is marked.

MeasureQwen3.5-35B-A3BClaude Sonnet 4
Arena (formerly LMArena) reported by Arena (formerly LMArena) · 3 results
Overall · TextArena rating, higher is better 147 · 136 of 387 measured 1,394 1,402thinking-32k reasoning
Business, management and finance · TextArena rating, higher is better 139 · 153 of 380 measured 1,403 1,387
Creative writing · TextArena rating, higher is better 163 · 98 of 385 measured 1,342 1,396thinking-32k reasoning
Artificial Analysis reported by Artificial Analysis · 3 results
Artificial Analysis Intelligence Indexindex score, higher is better 108 · 109 of 243 measured 19.3 18.9thinking reasoning
GPQA Diamond% of questions, higher is better 84 · 122 of 231 measured 84.5% 77.7%thinking reasoning
Humanity's Last Exam% of questions, higher is better 106 · 148 of 242 measured 21.0% 10.7%thinking reasoning
UGI Leaderboard reported by UGI Leaderboard · 3 results
Writing score · UGIscore out of 100, higher is better 97 · 32 of 230 measured 42.6think-prefill reasoning 63.7no reasoning
Requested-length error · UGI% off the requested word count, lower is better 83 · 13 of 230 measured 17.0%no reasoning 4.0%no reasoning
Style adherence · UGIscore from 0 to 1, higher is better 151 · 76 of 230 measured 0.33no reasoning 0.36no reasoning
Vectara Hallucination Leaderboard reported by Vectara Hallucination Leaderboard · 2 results
Hallucination rate · Vectara% of summaries, lower is better 62 · 60 of 104 measured 10.5% 10.3%
Answer rate · Vectara% of documents, higher is better 31 · 72 of 104 measured 99.8% 98.6%
Show all 21 results (10 more)
MeasureQwen3.5-35B-A3BClaude Sonnet 4
Arena (formerly LMArena) reported by Arena (formerly LMArena) · 3 results
Expert prompts · TextArena rating, higher is better 134 · 120 of 338 measured 1,419 1,433thinking-32k reasoning
Instruction following · TextArena rating, higher is better 140 · 100 of 387 measured 1,386 1,415thinking-32k reasoning
Writing, literature and language · TextArena rating, higher is better 155 · 111 of 386 measured 1,363 1,398thinking-32k reasoning
Artificial Analysis reported by Artificial Analysis · 7 results
Terminal-Bench 2.1% of tasks, higher is better 72 · 77 of 130 measured 40.8%no reasoning 36.3%thinking reasoning
τ-bench banking% of tasks, higher is better 107 · 54 of 121 measured 4.9%no reasoning 16.7%thinking reasoning
Artificial Analysis Coding Indexindex score, higher is better 79 · 78 of 131 measured 37.0no reasoning 37.6thinking reasoning
IFBench% of instructions, higher is better 39 · 91 of 195 measured 72.5% 54.7%thinking reasoning
Long-context reasoning (AA-LCR)% of questions, higher is better 99 · 107 of 233 measured 72.0% 70.3%thinking reasoning
Terminal-Bench Hard% of tasks, higher is better 74 · 65 of 190 measured 26.5% 31.1%thinking reasoning
τ²-bench telecom% of tasks, higher is better 45 · 90 of 193 measured 89.2% 64.6%thinking reasoning

Quick answers

Is Qwen3.5-35B-A3B better than Claude Sonnet 4?

They score about the same, so pick Qwen3.5-35B-A3B: it costs 13 times less per token.

Which is cheaper, Qwen3.5-35B-A3B or Claude Sonnet 4?

Qwen3.5-35B-A3B is cheaper: $0.45 against $6.00 per million tokens, 13 times less.

Which is better for agents and tool use, Qwen3.5-35B-A3B or Claude Sonnet 4?

Claude Sonnet 4 ranks 83 of 164 models on sale for multi-step tasks with tools: support desks, coding agents, function calls, against 116 for Qwen3.5-35B-A3B.

Which is better for reasoning and knowledge, Qwen3.5-35B-A3B or Claude Sonnet 4?

Qwen3.5-35B-A3B ranks 92 of 198 models on sale for hard questions across science, maths and general knowledge, against 115 for Claude Sonnet 4.

Which is better for writing, Qwen3.5-35B-A3B or Claude Sonnet 4?

Claude Sonnet 4 ranks 68 of 188 models on sale for what people prefer in blind comparisons, and judged writing quality, against 108 for Qwen3.5-35B-A3B.

Which is better for sticking to the facts, Qwen3.5-35B-A3B or Claude Sonnet 4?

Claude Sonnet 4 ranks 88 of 152 models on sale for summarising without inventing things, and factual answers, against 112 for Qwen3.5-35B-A3B.

Which has the bigger context window, Qwen3.5-35B-A3B or Claude Sonnet 4?

Qwen3.5-35B-A3B: 262,144 tokens, against 200,000 for Claude Sonnet 4.

Run Qwen3.5-35B-A3B and Claude Sonnet 4 on your own prompt

Benchmarks aren't your data. Try both side by side in the playground, with the cost of every answer.

Try the playgroundTalk to us