Gemini 3.1 Flash-Lite vs Grok 4 Fast Reasoning >128k
Side-by-side comparison of pricing and capabilities
Gemini 3.1 Flash-Lite
Grok 4 Fast Reasoning >128k
Input Price Comparison
| Attribute | Gemini 3.1 Flash-Lite | Grok 4 Fast Reasoning >128k |
|---|---|---|
| Provider | xAI | |
| Input Price | $0.25 /1M tokens | $0.4 /1M tokens |
| Output Price | $1.5 /1M tokens | $1 /1M tokens |
| Cached Input | $0.025 /1M tokens | $0.050 /1M tokens |
| Context Window | 1.0M | 1.0M |
| Type | chat | reasoning |
| Status | preview | current |
Capability Comparison
| Capability | Gemini 3.1 Flash-Lite | Grok 4 Fast Reasoning >128k |
|---|---|---|
| multilingual | ||
| reasoning |
Which should you choose?
Budget-conscious: Gemini 3.1 Flash-Lite is 38% cheaper on input tokens ($0.25 vs $0.4 per 1M tokens).
Context-heavy tasks: Both models offer the same context window size.
Capability fit: Gemini 3.1 Flash-Lite supports 1 capabilities (multilingual), while Grok 4 Fast Reasoning >128k supports 1 (reasoning).
Frequently Asked Questions
Which is cheaper: Gemini 3.1 Flash-Lite or Grok 4 Fast Reasoning >128k?
Gemini 3.1 Flash-Lite costs $0.25/1M input vs Grok 4 Fast Reasoning >128k at $0.4/1M input. Gemini 3.1 Flash-Lite is 38% cheaper on input tokens.
How do output prices compare between Gemini 3.1 Flash-Lite and Grok 4 Fast Reasoning >128k?
Gemini 3.1 Flash-Lite output: $1.5/1M, Grok 4 Fast Reasoning >128k output: $1/1M. Grok 4 Fast Reasoning >128k is more economical for generation-heavy workloads.
What is Gemini 3.1 Flash-Lite best used for?
Gemini 3.1 Flash-Lite 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.