GPT-4.5vsQwen3.5 397B A17B
Qwen3.5 397B A17B is cheaper than GPT-4.5 at $0.6/M vs $75/M input tokens.
| Spec | GPT-4.5 | Qwen3.5 397B A17B |
|---|---|---|
| Input price | $75/M tokens | $0.6/M tokens |
| Output price | $150/M tokens | $3.6/M tokens |
| Context window | 128K tokens | 262K tokens |
| Parameters | Not disclosed | 397B (17B active) |
| Weights | — | Open |
| Free API (OpenRouter) | No | No |
| Released | Feb 2025 | Feb 2026 |
| SWE-bench Verified | 28.0% | 76.4% |
Our Verdict
GPT-4.5
Qwen3.5 397B A17B
Not enough votes to call it. On the specs, nothing separates them.
Qwen3.5 397B A17B costs 42x less per token.
Too close to call
API pricing
Cost per 1M tokens
GPT-4.5
Input
$75.00
Output
$150.00
Qwen3.5 397B A17B
Input
$0.60
125× cheaper
Output
$3.60
42× cheaper
Qwen3.5 397B A17B is cheaper on both: 125× input, 42× output.
Where to run it
10 hosts, cheapest first
GPT-4.5
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 9 Sep 2026.
Writing DNA
Style Comparison
Similarity
49%
Qwen3.5 397B A17B uses 22.8x more emoji
GPT-4.5
Qwen3.5 397B A17B
63%Vocabulary54%
16wSentence Length14w
0.57Hedging0.39
4.7Bold6.9
6.4Lists4.2
0.00Emoji0.23
1.30Headings0.93
0.54Transitions0.17
Based on 11 + 23 text responses
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