head-to-head
OpenAI: GPT-5.3-Codex vs Qwen: Qwen3.5 Plus 2026-02-15
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-23.
| OpenAI: GPT-5.3-Codex | Qwen: Qwen3.5 Plus 2026-02-15 | |
|---|---|---|
| Vendor | openai | qwen |
| Quality Score | 100 | 100 |
| Benchmark Score | 53.3 | - |
| Input Price | $1.75/M | $0.26/M |
| Output Price | $14.00/M | $1.56/M |
| Context Window | 400,000 | 1,000,000 |
| Max Output | 128,000 | 65,536 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 53.6 | - |
Who wins by task?
| Task | OpenAI: GPT-5.3-Codex | Qwen: Qwen3.5 Plus 2026-02-15 |
|---|---|---|
| SQL Generation | 138 | 133 |
| Code Review | 142 | 132 |
| Code Completion | 117 | 131 |
| Code Refactoring | 144 | 136 |
| Bug Fixing | 146 | 136 |
| Unit Test Generation | 130 | 124 |
| Code Documentation | 133 | 131 |
| Regex Writing | 122 | 119 |
| CI/CD Pipelines | 126 | 120 |
| Frontend Component Design | 128 | 122 |
| Data Analysis | 132 | 124 |
| CSV / Spreadsheet Cleanup | 134 | 133 |
| ETL Scripting | 135 | 128 |
| JSON Extraction | 120 | 131 |
| Bulk Data Labeling | 117 | 129 |
| OCR / Document Parsing | 133 | 131 |
| Table Extraction from PDFs | 133 | 131 |
| Long-Document Summarization | 145 | 137 |
| Short-Form Summarization | 115 | 123 |
| Blog Post Writing | 126 | 121 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →
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