o3 Mini vs Qwen3.5 Plus 2026-02-15
Qwen3.5 Plus 2026-02-15 costs 2.8x less per output token than o3 Mini ($1.56 vs $4.40 per million). Updated October 21, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- 38.0
- Output $/M
- $4.40
- Coding
- No data
- Overall
- No data
- Output $/M
- $1.56
o3 Mini or Qwen3.5 Plus 2026-02-15: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Compare them on price, context and the boards below.
No benchmark has tested both yet. o3 Mini has results on Aider polyglot, SWE-bench Verified and SWE-bench Lite; Qwen3.5 Plus 2026-02-15 on Design Arena: websites, Design Arena: UI components and Design Arena: game dev. Compare them on price and context instead.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Intelligence
AA Intelligence Index
No call
Only o3 Mini has a AA Intelligence Index result, 12.5.
Directional only
Reasoning
GPQA Diamond
No call
Only o3 Mini has a GPQA Diamond result, 75.5%.
Directional only
Math
AIME
No call
Only o3 Mini has a AIME result, 86.5%.
Directional only
Knowledge
MMLU Pro
No call
Only o3 Mini has a MMLU Pro result, 78.7%.
Directional only
Web design
Design Arena: websites
No call
Only Qwen3.5 Plus 2026-02-15 has a Design Arena: websites result, 1187.
Directional only
Long documents
Listed context window
Qwen3.5 Plus 2026-02-15
Qwen3.5 Plus 2026-02-15 takes 1M tokens against 200K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Qwen3.5 Plus 2026-02-15
o3 Mini $0.0033, Qwen3.5 Plus 2026-02-15 $0.0010 per turn.
List prices
At a glance
- Coding index
- o3 Mini not benchmarked, Qwen3.5 Plus 2026-02-15 not benchmarked.
- Widest category
- None yet: no category has been tested on both models.
- Widest single gap
- None yet: no benchmark has tested both models.
- Output price
- o3 Mini $4.40 against Qwen3.5 Plus 2026-02-15 $1.56 per million output tokens, 2.8x apart.
- Context window
- o3 Mini takes 200K tokens, Qwen3.5 Plus 2026-02-15 1M.
Benchmark by benchmark
Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.
CodingDirectional onlySix of these boards feed the Vibe Coding Index13 boards measured
| Benchmark | o3 Mini | Qwen3.5 Plus 2026-02-15 | Leader |
|---|---|---|---|
| Aider polyglot | 60.4% | Not measured | Only o3 Mini measured |
| SWE-bench Verified | 42.4% | Not measured | Only o3 Mini measured |
| SWE-bench Lite | 32.3% | Not measured | Only o3 Mini measured |
| LiveCodeBench (Vals AI) | 71.5% | Not measured | Only o3 Mini measured |
| LiveCodeBench (Artificial Analysis run) | 73.4% | Not measured | Only o3 Mini measured |
| SciCode | 42.8% | Not measured | Only o3 Mini measured |
| Terminal-Bench Hard (Artificial Analysis run) | 6.8% | Not measured | Only o3 Mini measured |
| GSO-Bench | 1.3% | Not measured | Only o3 Mini measured |
| WeirdML | 43.7% | Not measured | Only o3 Mini measured |
| Cybench | 22.5% | Not measured | Only o3 Mini measured |
| LMArena Text: coding | 1378 | Not measured | Only o3 Mini measured |
| LMArena Text: software and IT | 1364 | Not measured | Only o3 Mini measured |
| SciCode | 7.7% | Not measured | Only o3 Mini measured |
| Neither model has a result on the other 26 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards measured
| Benchmark | o3 Mini | Qwen3.5 Plus 2026-02-15 | Leader |
|---|---|---|---|
| AA Intelligence Index | 12.5 | Not measured | Only o3 Mini measured |
| Epoch Capabilities Index | 140.2 | Not measured | Only o3 Mini measured |
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | o3 Mini | Qwen3.5 Plus 2026-02-15 | Leader |
|---|---|---|---|
| τ²-Bench Telecom | 31.3% | Not measured | Only o3 Mini measured |
| Neither model has a result on the other 40 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index12 boards measured
| Benchmark | o3 Mini | Qwen3.5 Plus 2026-02-15 | Leader |
|---|---|---|---|
| GPQA Diamond | 75.5% | Not measured | Only o3 Mini measured |
| GPQA Diamond (Artificial Analysis run) | 77.3% | Not measured | Only o3 Mini measured |
| Humanity's Last Exam (Artificial Analysis run) | 12.0% | Not measured | Only o3 Mini measured |
| GPQA Diamond (Epoch AI run) | 77.0% | Not measured | Only o3 Mini measured |
| ARC-AGI | 34.5% | Not measured | Only o3 Mini measured |
| ARC-AGI-2 | 3.0% | Not measured | Only o3 Mini measured |
| SimpleBench | 22.8% | Not measured | Only o3 Mini measured |
| Chess puzzles | 15.0% | Not measured | Only o3 Mini measured |
| Mystery game puzzles | 7.0% | Not measured | Only o3 Mini measured |
| LMArena Text: hard prompts | 1365 | Not measured | Only o3 Mini measured |
| LMArena Text: expert | 1364 | Not measured | Only o3 Mini measured |
| LMArena Text: hard prompts in English | 1375 | Not measured | Only o3 Mini measured |
| Neither model has a result on the other 10 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index9 boards measured
| Benchmark | o3 Mini | Qwen3.5 Plus 2026-02-15 | Leader |
|---|---|---|---|
| AIME | 86.5% | Not measured | Only o3 Mini measured |
| MATH 500 (Vals AI) | 91.8% | Not measured | Only o3 Mini measured |
| MGSM (Vals AI) | 91.3% | Not measured | Only o3 Mini measured |
| OTIS Mock AIME | 76.9% | Not measured | Only o3 Mini measured |
| FrontierMath, tiers 1 to 3 | 18.6% | Not measured | Only o3 Mini measured |
| FrontierMath, tier 4 | 0.0% | Not measured | Only o3 Mini measured |
| MATH level 5 | 96.5% | Not measured | Only o3 Mini measured |
| LMArena Text: math | 1396 | Not measured | Only o3 Mini measured |
| LMArena Text: mathematical work | 1399 | Not measured | Only o3 Mini measured |
| Neither model has a result on the other 4 boards here | |||
KnowledgeDirectional onlyPublic boards, shown as published, kept out of the index11 boards measured
| Benchmark | o3 Mini | Qwen3.5 Plus 2026-02-15 | Leader |
|---|---|---|---|
| MMLU Pro | 78.7% | Not measured | Only o3 Mini measured |
| LegalBench (Vals AI) | 71.5% | Not measured | Only o3 Mini measured |
| CorpFin (Vals AI) | 45.3% | Not measured | Only o3 Mini measured |
| TaxEval (Vals AI) | 69.4% | Not measured | Only o3 Mini measured |
| MedQA (Vals AI) | 94.8% | Not measured | Only o3 Mini measured |
| MMLU Pro (Artificial Analysis run) | 80.2% | Not measured | Only o3 Mini measured |
| SimpleQA Verified | 15.3% | Not measured | Only o3 Mini measured |
| LMArena Text: science | 1339 | Not measured | Only o3 Mini measured |
| LMArena Text: medicine and healthcare | 1330 | Not measured | Only o3 Mini measured |
| LMArena Text: legal and government | 1328 | Not measured | Only o3 Mini measured |
| LMArena Text: business and finance | 1313 | Not measured | Only o3 Mini measured |
| Neither model has a result on the other 7 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards measured
| Benchmark | o3 Mini | Qwen3.5 Plus 2026-02-15 | Leader |
|---|---|---|---|
| Design Arena: websites | Not measured | 1187 | Only Qwen3.5 Plus 2026-02-15 measured |
| Design Arena: UI components | Not measured | 1178 | Only Qwen3.5 Plus 2026-02-15 measured |
| Design Arena: game dev | Not measured | 1105 | Only Qwen3.5 Plus 2026-02-15 measured |
| Design Arena: data viz | Not measured | 1135 | Only Qwen3.5 Plus 2026-02-15 measured |
| Design Arena: 3D | Not measured | 1119 | Only Qwen3.5 Plus 2026-02-15 measured |
| Design Arena: all code categories | Not measured | 1167 | Only Qwen3.5 Plus 2026-02-15 measured |
| Design Arena: SVG | Not measured | 1108 | Only Qwen3.5 Plus 2026-02-15 measured |
| Design Arena: ASCII art | Not measured | 1094 | Only Qwen3.5 Plus 2026-02-15 measured |
| Neither model has a result on the other 1 board here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index23 boards measured
| Benchmark | o3 Mini | Qwen3.5 Plus 2026-02-15 | Leader |
|---|---|---|---|
| IFBench | 67.1% | Not measured | Only o3 Mini measured |
| Long context reasoning (AA-LCR) | 43.0% | Not measured | Only o3 Mini measured |
| DTBench | 68.8% | Not measured | Only o3 Mini measured |
| LMCA | 19.0% | Not measured | Only o3 Mini measured |
| Fiction.LiveBench | 50.0% | Not measured | Only o3 Mini measured |
| Creative writing (Lech Mazur) | 61.7% | Not measured | Only o3 Mini measured |
| LMArena Text | 1337 | Not measured | Only o3 Mini measured |
| LMArena Text: instruction following | 1337 | Not measured | Only o3 Mini measured |
| LMArena Text: creative writing | 1286 | Not measured | Only o3 Mini measured |
| LMArena Text: English | 1351 | Not measured | Only o3 Mini measured |
| LMArena Text: non-English | 1319 | Not measured | Only o3 Mini measured |
| LMArena Text: Chinese | 1379 | Not measured | Only o3 Mini measured |
| LMArena Text: German | 1303 | Not measured | Only o3 Mini measured |
| LMArena Text: Japanese | 1286 | Not measured | Only o3 Mini measured |
| LMArena Text: Korean | 1313 | Not measured | Only o3 Mini measured |
| LMArena Text: French | 1334 | Not measured | Only o3 Mini measured |
| LMArena Text: Spanish | 1321 | Not measured | Only o3 Mini measured |
| LMArena Text: Russian | 1304 | Not measured | Only o3 Mini measured |
| LMArena Text: Polish | 1294 | Not measured | Only o3 Mini measured |
| LMArena Text: multi-turn | 1320 | Not measured | Only o3 Mini measured |
| LMArena Text: longer queries | 1343 | Not measured | Only o3 Mini measured |
| LMArena Text: writing and language | 1313 | Not measured | Only o3 Mini measured |
| LMArena Text: entertainment and media | 1283 | Not measured | Only o3 Mini measured |
| Neither model has a result on the other 23 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
Qwen3.5 Plus 2026-02-15 costs less
Repository review
50K input + 3K output tokens
Qwen3.5 Plus 2026-02-15 costs less
Agent loop
200K input + 10K output tokens
Qwen3.5 Plus 2026-02-15 costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | OpenAI o3 Mini | Qwen3.5 Plus 2026-02-15 |
|---|---|---|
| Maker | OpenAI | Qwen |
| Weights | No public weights listed | No public weights listed |
| Released | January 31, 2025 | February 16, 2026 |
| Context window | 200K | 1M |
| Input $/Mtok | $1.10 | $0.26 |
| Output $/Mtok | $4.40 | $1.56 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 0 | 0 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is o3 Mini better than Qwen3.5 Plus 2026-02-15 for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Compare them on price, context and the boards below.
Which is cheaper, o3 Mini or Qwen3.5 Plus 2026-02-15?
o3 Mini costs $1.10 per million input tokens and $4.40 per million output tokens; Qwen3.5 Plus 2026-02-15 costs $0.26 and $1.56. Cost per solved task is known for neither of them.
Which has the bigger context window, o3 Mini or Qwen3.5 Plus 2026-02-15?
Qwen3.5 Plus 2026-02-15, with 1M tokens against 200K.
Has any benchmark tested both o3 Mini and Qwen3.5 Plus 2026-02-15?
No benchmark has tested both yet. o3 Mini has results on Aider polyglot, SWE-bench Verified and SWE-bench Lite; Qwen3.5 Plus 2026-02-15 on Design Arena: websites, Design Arena: UI components and Design Arena: game dev. Compare them on price and context instead. Data as of October 21, 2026.