DeepSeek V4.1 Flash is a sparse mixture-of-experts model from DeepSeek, and the first built on the company's Causal Encoder-Decoder (CED) architecture. It activates 8B parameters on input and 16B on...
Model details →DeepSeek: DeepSeek V4.1 Flash vs xAI: Grok 4.1 Fast
DeepSeek: DeepSeek V4.1 Flash and xAI: Grok 4.1 Fast are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
Grok 4.1 Fast is xAI's best agentic tool calling model that shines in real-world use cases like customer support and deep research. 2M context window. Reasoning can be enabled/disabled using the `reasoning` `enabled` parameter in the API. …
Model details →Side-by-side comparison
| Capability | DeepSeek: DeepSeek V4.1 Flash | xAI: Grok 4.1 Fast | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.0M | 2M | 🏆 xAI: Grok 4.1 Fast |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.10 | $0.20 | 🏆 DeepSeek: DeepSeek V4.1 Flash |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $0.50 | $0.50 | Tie |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is DeepSeek: DeepSeek V4.1 Flash better than xAI: Grok 4.1 Fast?
DeepSeek: DeepSeek V4.1 Flash and xAI: Grok 4.1 Fast are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between DeepSeek: DeepSeek V4.1 Flash and xAI: Grok 4.1 Fast?
Input: $0.10 vs $0.20 per 1M tokens. Output: $0.50 vs $0.50 per 1M tokens.
What context windows do DeepSeek: DeepSeek V4.1 Flash and xAI: Grok 4.1 Fast support?
DeepSeek: DeepSeek V4.1 Flash supports up to 1.0M tokens. xAI: Grok 4.1 Fast supports up to 2M tokens.
Do both DeepSeek: DeepSeek V4.1 Flash and xAI: Grok 4.1 Fast support tool calling?
DeepSeek: DeepSeek V4.1 Flash: yes. xAI: Grok 4.1 Fast: yes.