Grok 4.1 Fast (Reasoning) vs Qwen3.5-Plus
Side-by-side specs, pricing and capabilities. Both models run on Clade under one subscription, so you can switch between them in the same conversation.
Grok 4.1 Fast (Reasoning) comes from xAI and Qwen3.5-Plus from Alibaba. The practical difference for most people is context, price, and which input types each one accepts.
Grok 4.1 Fast (Reasoning) holds more in a single conversation — 2M tokens against 1M — which matters for long documents and large codebases.
Grok 4.1 Fast (Reasoning) is the cheaper of the two on input tokens at $0.20 / 1M tokens.
| Specification | Grok 4.1 Fast (Reasoning) | Qwen3.5-Plus |
|---|---|---|
| Provider | xAI | Alibaba |
| Model ID | grok-4-1-fast-reasoning | qwen3.5-plus |
| Context window | 2M | 1M |
| Max output | — | 64K |
| Input price | $0.20 / 1M tokens | $0.40 / 1M tokens |
| Output price | $0.50 / 1M tokens | $2.40 / 1M tokens |
| Knowledge cutoff | — | — |
| Input types | text, image, file, audio | text, image, video |
| Output types | text | text |
| Plan | Free | Free |
Which should you use?
Pick Grok 4.1 Fast (Reasoning) when…
- You need the larger context window — 2M against 1M.
- Cost matters: input runs at $0.20 / 1M tokens versus $0.40 / 1M tokens.
- You need file and audio input, which the other model does not accept.
Pick Qwen3.5-Plus when…
- You want longer single responses — up to 64K output tokens.
- You need video input, which the other model does not accept.
Related comparisons
Try both on Clade
You do not have to choose. One Clade subscription gives you Grok 4.1 Fast (Reasoning), Qwen3.5-Plus, and every other model on the platform.