Grok 4.1 Fast (Non-Reasoning) vs Sonar
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 (Non-Reasoning) comes from xAI and Sonar from Perplexity. The practical difference for most people is context, price, and which input types each one accepts.
Grok 4.1 Fast (Non-Reasoning) holds more in a single conversation — 2M tokens against 128K — which matters for long documents and large codebases.
Grok 4.1 Fast (Non-Reasoning) is the cheaper of the two on input tokens at $0.20 / 1M tokens.
| Specification | Grok 4.1 Fast (Non-Reasoning) | Sonar |
|---|---|---|
| Provider | xAI | Perplexity |
| Model ID | grok-4-1-fast-non-reasoning | sonar |
| Context window | 2M | 128K |
| Max output | — | — |
| Input price | $0.20 / 1M tokens | $1.00 / 1M tokens |
| Output price | $0.50 / 1M tokens | $1.00 / 1M tokens |
| Knowledge cutoff | — | — |
| Input types | text, image, file, audio | text, image, file |
| Output types | text | text |
| Plan | Free | Free |
Which should you use?
Pick Grok 4.1 Fast (Non-Reasoning) when…
- You need the larger context window — 2M against 128K.
- Cost matters: input runs at $0.20 / 1M tokens versus $1.00 / 1M tokens.
- You need audio 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 (Non-Reasoning), Sonar, and every other model on the platform.