Grok 3 Mini vs Grok 4 Fast Reasoning >128k
Side-by-side comparison of pricing and capabilities
Grok 3 Mini
Grok 4 Fast Reasoning >128k
Input Price Comparison
| Attribute | Grok 3 Mini | Grok 4 Fast Reasoning >128k |
|---|---|---|
| Provider | xAI | xAI |
| Input Price | $0.3 /1M tokens | $0.4 /1M tokens |
| Output Price | $0.5 /1M tokens | $1 /1M tokens |
| Cached Input | $0.075 /1M tokens | $0.050 /1M tokens |
| Context Window | 131K | 1.0M |
| Type | chat | reasoning |
| Status | current | current |
Capability Comparison
| Capability | Grok 3 Mini | Grok 4 Fast Reasoning >128k |
|---|---|---|
| reasoning | ||
| coding |
Which should you choose?
Budget-conscious: Grok 3 Mini is 25% cheaper on input tokens ($0.3 vs $0.4 per 1M tokens).
Context-heavy tasks: Grok 4 Fast Reasoning >128k offers a larger context window (1.0M vs 131K), making it better for long documents or conversations.
Capability fit: Grok 3 Mini supports 2 capabilities (reasoning, coding), while Grok 4 Fast Reasoning >128k supports 1 (reasoning).
Frequently Asked Questions
Which is cheaper: Grok 3 Mini or Grok 4 Fast Reasoning >128k?
Grok 3 Mini costs $0.3/1M input vs Grok 4 Fast Reasoning >128k at $0.4/1M input. Grok 3 Mini is 25% cheaper on input tokens.
How do output prices compare between Grok 3 Mini and Grok 4 Fast Reasoning >128k?
Grok 3 Mini output: $0.5/1M, Grok 4 Fast Reasoning >128k output: $1/1M. Grok 3 Mini is more economical for generation-heavy workloads.
What is Grok 3 Mini best used for?
Grok 3 Mini is best for budget-conscious applications, high-volume chatbots, and tasks where cost efficiency is the primary concern.
What is Grok 4 Fast Reasoning >128k best used for?
Grok 4 Fast Reasoning >128k is suited for complex reasoning, analysis, and tasks that benefit from its reasoning capabilities.