Compare / Qwen3.5-Flash vs gpt-oss-120b

Qwen3.5-Flash vs gpt-oss-120b

Which is cheaper, which is more capable, and which does better at each kind of work, from 10 results on 3 sources that measured both models.

AlibabaQwen3.5-Flash $0.065 in · $0.26 out
OpenAIgpt-oss-120b Released 5 Aug 2025 · $0.15 in · $0.60 out
Qwen3.5-Flash wins 9gpt-oss-120b wins 1

Of the 10 results both models have, the better value on each. Results whose reported ranges overlap are too close to call.

Results as of 14 October 2026 (catalogue release 2026-10-14-7d7cf32c3f6d). See also Alibaba vs OpenAI, every model from both labs.

Qwen3.5-Flash or gpt-oss-120b? The short answer

They score about the same, so pick Qwen3.5-Flash: it costs 2.3 times less per token.

  • Qwen3.5-Flash is cheaper: $0.11 against $0.26 per million tokens, 2.3 times less.
  • On third-party benchmarks, on the results both models have: Qwen3.5-Flash does better for agents and tool use, writing and sticking to the facts.

Head to head

$0.11
Price per million tokens, blendedlower is better
$0.26
1,000,000
Context window, tokens
131,072

Every fact side by side

Qwen3.5-Flashgpt-oss-120b
Price per million tokens$0.065 in · $0.26 out$0.15 in · $0.60 out
Blended (3 in : 1 out)$0.11$0.26
Cheapest host, blended–$0.065 (CoreWeave, FP4)
Intelligence Index–11.6
Spring Prompt overall––
Output speed, tokens a second–242
Context window1,000,000 tokens131,072 tokens
Released–5 Aug 2025
WeightsClosedOpen
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 145 of 166 122 of 166
Professional workReal tasks from banking, consulting and law, business documents and freelance projects not measured 49 of 51
Reasoning and knowledgeHard questions across science, maths and general knowledge not measured 116 of 200
WritingWhat people prefer in blind comparisons, and judged writing quality 117 of 189 134 of 189
Sticking to the factsSummarising without inventing things, and factual answers 120 of 153 140 of 153

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-Flashgpt-oss-120b
Arena (formerly LMArena) reported by Arena (formerly LMArena) · 3 results
Overall · TextArena rating, higher is better 142 · 187 of 387 measured 1,396 1,352
Overall · Text factualityArena rating, higher is better 123 · 142 of 163 measured 1,414 1,385
Business, management and finance · TextArena rating, higher is better 137 · 183 of 380 measured 1,403 1,352
Vectara Hallucination Leaderboard reported by Vectara Hallucination Leaderboard · 2 results
Hallucination rate · Vectara% of summaries, lower is better 62 · 88 of 104 measured 10.5% 14.2%
Answer rate · Vectara% of documents, higher is better 31 · 17 of 104 measured 99.8% 99.9%
Vending-Bench 2 reported by Vending-Bench 2 · 1 result
Money after a yearUS dollars, higher is better 48 · 56 of 58 measured $462.69 $-21.53
Show all 10 results (4 more)
MeasureQwen3.5-Flashgpt-oss-120b
Arena (formerly LMArena) reported by Arena (formerly LMArena) · 4 results
Creative writing · TextArena rating, higher is better 167 · 238 of 385 measured 1,337 1,278
Expert prompts · TextArena rating, higher is better 135 · 188 of 338 measured 1,419 1,357
Instruction following · TextArena rating, higher is better 148 · 204 of 387 measured 1,381 1,323
Writing, literature and language · TextArena rating, higher is better 149 · 215 of 386 measured 1,367 1,309

Quick answers

Is Qwen3.5-Flash better than gpt-oss-120b?

They score about the same, so pick Qwen3.5-Flash: it costs 2.3 times less per token.

Which is cheaper, Qwen3.5-Flash or gpt-oss-120b?

Qwen3.5-Flash is cheaper: $0.11 against $0.26 per million tokens, 2.3 times less.

Which is better for agents and tool use, Qwen3.5-Flash or gpt-oss-120b?

gpt-oss-120b ranks 122 of 166 models on sale for multi-step tasks with tools: support desks, coding agents, function calls, against 145 for Qwen3.5-Flash.

Which is better for writing, Qwen3.5-Flash or gpt-oss-120b?

Qwen3.5-Flash ranks 117 of 189 models on sale for what people prefer in blind comparisons, and judged writing quality, against 134 for gpt-oss-120b.

Which is better for sticking to the facts, Qwen3.5-Flash or gpt-oss-120b?

Qwen3.5-Flash ranks 120 of 153 models on sale for summarising without inventing things, and factual answers, against 140 for gpt-oss-120b.

Which has the bigger context window, Qwen3.5-Flash or gpt-oss-120b?

Qwen3.5-Flash: 1,000,000 tokens, against 131,072 for gpt-oss-120b.

Run Qwen3.5-Flash and gpt-oss-120b 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