GPT-5.1-Codex vs Qwen3.5 Plus
OpenAI vs Alibaba — benchmarks, pricing, and capabilities side by side.
- •Qwen3.5 Plus is cheaper ($0.26 vs $1.25 per 1M input)
- •Qwen3.5 Plus has a larger context window (1M)
| GPT-5.1-Codex | Qwen3.5 Plus | |
|---|---|---|
| Intelligence index | 88.2 | — |
| Developer | OpenAI | Alibaba |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 400,000 tokens | 1,000,000 tokens |
| Input price | $1.25 / 1M | $0.26 / 1M |
| Output price | $10.00 / 1M | $1.56 / 1M |
| Speed | 188 tok/s | — |
| Released | November 13, 2025 | February 16, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image | Text, Image, Video |
| Output modalities | Text | Text |