Mistral Small 4 is the next major release in the Mistral Small family, unifying the capabilities of several flagship Mistral models into a single system. It combines strong reasoning from Magistral, multimodal understanding from Pixtral, an…
Model details →Mistral: Mistral Small 4 vs xAI: Grok 4 Fast
xAI: Grok 4 Fast wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
Grok 4 Fast is xAI's latest multimodal model with SOTA cost-efficiency and a 2M token context window. It comes in two flavors: non-reasoning and reasoning. Read more about the model on xAI's [news post](http://x.ai/news/grok-4-fast). Reaso…
Model details →Side-by-side comparison
| Capability | Mistral: Mistral Small 4 | xAI: Grok 4 Fast | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 262K | 2M | 🏆 xAI: Grok 4 Fast |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.15 | $0.20 | 🏆 Mistral: Mistral Small 4 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $0.60 | $0.50 | 🏆 xAI: Grok 4 Fast |
| 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 Mistral: Mistral Small 4 better than xAI: Grok 4 Fast?
xAI: Grok 4 Fast wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Mistral: Mistral Small 4 and xAI: Grok 4 Fast?
Input: $0.15 vs $0.20 per 1M tokens. Output: $0.60 vs $0.50 per 1M tokens.
What context windows do Mistral: Mistral Small 4 and xAI: Grok 4 Fast support?
Mistral: Mistral Small 4 supports up to 262K tokens. xAI: Grok 4 Fast supports up to 2M tokens.
Do both Mistral: Mistral Small 4 and xAI: Grok 4 Fast support tool calling?
Mistral: Mistral Small 4: yes. xAI: Grok 4 Fast: yes.