GPT-5 Codex vs Qwen3.5
OpenAI vs Alibaba — benchmarks, pricing, and capabilities side by side.
- •GPT-5 Codex has a larger context window (400K)
| GPT-5 Codex | Qwen3.5 | |
|---|---|---|
| Intelligence index | 87.1 | — |
| Developer | OpenAI | Alibaba |
| Type | Multimodal | Multimodal |
| Access | API only | Open weights |
| Context window | 400,000 tokens | 262,144 tokens |
| Input price | $1.25 / 1M | — |
| Output price | $10.00 / 1M | — |
| Speed | 180 tok/s | — |
| Released | September 23, 2025 | February 16, 2026 |
| Parameters | — | 397B (17B active) |
| Input modalities | Text, Image | Text, Image, Video |
| Output modalities | Text | Text |