Model comparison
GPT-5.3 Codex vs Qwen3.6 Flash
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 38.8 on the Noometry Index. Qwen3.6 Flash costs 11× less per token, which makes it the better buy when GPT-5.3 Codex's lead doesn't matter for your workload.
Last verified . 2 shared benchmarks.
Alibaba (Qwen)Summary
- They share 2 benchmarks with published results for both.
- Qwen3.6 Flash is cheaper at $0.19 / $1.13 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Codex.
- Qwen3.6 Flash accepts more context: 1M tokens versus 400K.
Side by side
| GPT-5.3 Codex | Qwen3.6 Flash | |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 45.8 | 38.8 |
| Released | 2026-02-05 | 2026-04-27 |
| Weights | Proprietary | Proprietary |
| Context window | 400K | 1M |
| Max output | 128K | 66K |
| Input $ / M tokens | $1.75 | $0.19 |
| Output $ / M tokens | $14 | $1.13 |
| Results tracked | 8 | 13 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Not comparable
GPT-5.3 Codex: 48.6 (#56), Qwen3.6 Flash: —
| Benchmark | GPT-5.3 Codex | Qwen3.6 Flash |
|---|---|---|
| ALE-Bench | 1,655 | 326.4 |
| SWE-bench Verified | 74.8% | — |
| LMArena WebDev | 1409 | — |
| WeirdML | 79.3% | — |
Agentic & Tool Use Not comparable
GPT-5.3 Codex: 48.0 (#9), Qwen3.6 Flash: —
| Benchmark | GPT-5.3 Codex | Qwen3.6 Flash |
|---|---|---|
| Terminal-Bench | 78.4% | — |
| METR Time Horizons | 74.5% | — |
| Vending-Bench 2 | 5,940 | — |
Reasoning Not comparable
GPT-5.3 Codex: —, Qwen3.6 Flash: 29.0 (#96)
| Benchmark | GPT-5.3 Codex | Qwen3.6 Flash |
|---|---|---|
| Epoch Capabilities Index | 156.77 | 143.26 |
| SimpleBench | — | 35.2% |
| Chess Puzzles | — | 20% |
| Mystery Game Puzzles | — | 18% |
| DTBench | — | 77.1% |
| LMCA | — | 31% |
Math Not comparable
GPT-5.3 Codex: —, Qwen3.6 Flash: 39.0 (#117)
| Benchmark | GPT-5.3 Codex | Qwen3.6 Flash |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 22.5% |
| OTIS Mock AIME 2024-2025 | — | 84.4% |
| FrontierMath (Feb 2025 set) | — | 10.3% |
| FrontierMath Tier 4 (v1) | — | 0% |
Knowledge Not comparable
GPT-5.3 Codex: —, Qwen3.6 Flash: 42.1 (#100)
| Benchmark | GPT-5.3 Codex | Qwen3.6 Flash |
|---|---|---|
| GPQA Diamond | — | 83.3% |
| SimpleQA Verified | — | 15.9% |
Frequently asked questions
Is GPT-5.3 Codex better than Qwen3.6 Flash?
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 38.8 on the Noometry Index. Qwen3.6 Flash costs 11× less per token, which makes it the better buy when GPT-5.3 Codex's lead doesn't matter for your workload.
Which is cheaper, GPT-5.3 Codex or Qwen3.6 Flash?
Qwen3.6 Flash is cheaper. It lists at $0.19 per million input tokens and $1.13 per million output tokens; GPT-5.3 Codex lists at $1.75 and $14.
Which has the bigger context window?
Qwen3.6 Flash does, with 1M tokens against 400K.
How many benchmarks do GPT-5.3 Codex and Qwen3.6 Flash share?
2 benchmarks have published results for both models. GPT-5.3 Codex has 8 scored results on Noometry and Qwen3.6 Flash has 13.