The Model Index
Models/Alibaba

Qwen3.5

AlibabaReleased 16 Feb 2026Open
CompareRun it yourself →Announcement
146134–158Index score#68 of 229 models
3/ 8Core tests taken3 of 6 areas · plus 5 anchor tests
−24Versus the frontier at releasebest then: GPT-5.3-Codex
$0.55/ $3.5Price per million tokensinput / output, list price
262KContext windowtokens it reads at once

Where it sitson the frontier

o3 reached this score 10 months earlier.

Test resultsby area · tick = best by any model

Reasoning & knowledgeevidence
GPQA Diamond
86%
Humanity's Last Exam
no result
Mathsevidence
FrontierMath T1-3
31%
Codingno evidence yet
SWE-bench Verified
no result
Terminal-Bench
no result
Agentsevidence
APEX-Agents
25%
Novel problemsno evidence yet
ARC-AGI-2
no result
Long tasksno evidence yet
METR time horizon
no result

Independent results from the Epoch AI benchmarking hub, best reasoning setting. The core tests are shown here; anchor tests also inform the score and can be shown above.

What others sayrank on each leaderboard

The Model Indexindependent tests, our method#68of 219 · 146
LMArena · Creative writingcreative writing#43of 386 · 1446LMArena · Codingcoding questions in chat#44of 383 · 1514LMArena · Textoverall chat quality, judged by people#48of 388 · 1465LMArena · Mathsmaths questions in chat#48of 373 · 1468Artificial Analysis Intelligence Indexoverall capability across ten evaluations#53of 207 · 21Epoch Capabilities Indexoverall capability from many benchmarks#67of 239 · 146.7LMArena · Visionunderstanding images#48of 149 · 1245LMArena · WebDevbuilding web apps and front ends#77of 123 · 1400

Further left is better. Leaderboards measure different things: LMArena is people voting blind between two answers, the others are test scores. Click any row for the source.

Best attop three among current models

Not in the top three among current models on any category we track.

Where this model places in the top three of today's models, on category leaderboards and on our core tests.

Where to use itprices checked 1 Oct 2026

From the lab

Qwen Chatapp · subscription↗Alibaba Cloud Model StudioAPI↗

API providers 10 · per million tokens, in / out

AAlibaba$0.39 / $2.34cheapestDDeepInfra$0.45 / $3.0 · fp8↗PParasail$0.50 / $3.6 · fp8↗DDigitalOcean$0.55 / $3.5↗PPhala$0.55 / $3.5↗AAtlasCloud$0.55 / $3.5 · fp8↗SStreamLake$0.60 / $3.6↗GGMICloud$0.60 / $3.6 · fp8↗

Run it yourself

🤗Official weightsQwen/Qwen3.5-397B-A17B↗

Provider prices come from OpenRouter's live listing; going direct to a provider can differ. Subscriptions are the lab's own apps.

Facts and sources

Released16 Feb 2026
Release entryQwen3.5 (397B open + 3.5-Plus)
Scored asQwen3.5 397B-A17B
Artificial Analysis index18
Output speed85 tokens/s

Alibaba releasesaround this one

Qwen3-Next-80B-A3BOpen
Qwen3-Max-ThinkingClosed
Qwen3.5Open
index 146
Qwen3.6-PlusClosed
index 148
Qwen3.6-35B-A3BOpen
index 139