Claude Opus 4.5vsQwen3.5 Plus 2026-02-15
Qwen3.5 Plus 2026-02-15 is the newer model, released after Claude Opus 4.5.
| Spec | Claude Opus 4.5 | Qwen3.5 Plus 2026-02-15 |
|---|---|---|
| Input price | — | $0.4/M tokens |
| Output price | — | $2.4/M tokens |
| Context window | — | 1.0M tokens |
| Weights | Closed | Closed |
| Free API (OpenRouter) | No | No |
| Released | Nov 2025 | Feb 2026 |
Our Verdict
Claude Opus 4.5
Qwen3.5 Plus 2026-02-15
Not enough votes to call it. On the specs, nothing separates them.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
Claude Opus 4.5
Input
—
Output
—
Qwen3.5 Plus 2026-02-15
Input
$0.40
Output
$2.40
Where to run it
5 hosts
Qwen3.5 Plus 2026-02-151 host
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
32%
Claude Opus 4.5 uses 2.9x more sentence length
Claude Opus 4.5
Qwen3.5 Plus 2026-02-15
66%Vocabulary54%
51wSentence Length18w
0.82Hedging0.51
6.0Bold5.3
4.5Lists2.9
0.18Emoji0.10
1.46Headings0.75
0.05Transitions0.09
Based on 27 + 23 text responses
Research
What we learned reading every model
FAQ
Common questions
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