Grok 3 Mini vs Gemini 3.1 Flash-Lite
Detailed pricing comparison and cost analysis.
Updated September 2026
Cost Simulator
| Feature | Grok 3 Mini | Gemini 3.1 Flash-Lite |
|---|---|---|
| Provider | xAI | |
| Input Price (1M) | $0.30 | $0.25 |
| Output Price (1M) | $0.50 | $1.50 |
| Context Window | 131,000 | 1,000,000 |
Verdict
Grok 3 Mini costs $0.30 per 1M input tokens and $0.50 per 1M output tokens. Gemini 3.1 Flash-Lite costs $0.25 per 1M input tokens and $1.50 per 1M output tokens. Gemini 3.1 Flash-Lite is 17% cheaper on input tokens than Grok 3 Mini. For output tokens, Grok 3 Mini is the more affordable option at $0.50/1M vs $1.50.
On context window, Gemini 3.1 Flash-Lite supports 1,000,000 tokens — meaning it can fit more conversation history, documents, or code in a single request. This matters for RAG pipelines, long document analysis, and agentic workflows where context builds up over many turns.
When to choose Grok 3 Mini
- ✓ Your workload is output-heavy — Grok 3 Mini generates text cheaper
- ✓ You are already integrated with xAI
When to choose Gemini 3.1 Flash-Lite
- ✓ You need the lowest input token cost ($ 0.25/1M)
- ✓ You need a larger context window (1,000,000 tokens)
- ✓ You are already integrated with Google
Use the calculator above to simulate your specific workload and find the exact break-even point. For most applications, the cheapest model is the one that minimises your total monthly bill given your input-to-output token ratio.
Frequently Asked Questions
Is Grok 3 Mini cheaper than Gemini 3.1 Flash-Lite? ▼
Gemini 3.1 Flash-Lite is cheaper on input tokens at $0.25/1M vs $0.30/1M for Grok 3 Mini — a 17% saving.
What is the context window of Grok 3 Mini vs Gemini 3.1 Flash-Lite? ▼
Grok 3 Mini has a 131,000-token context window. Gemini 3.1 Flash-Lite has a 1,000,000-token context window. Gemini 3.1 Flash-Lite supports the larger context, suitable for longer documents and agentic workflows.
Which model is better: Grok 3 Mini or Gemini 3.1 Flash-Lite? ▼
The best choice depends on your use case. For cost efficiency on input tokens, Gemini 3.1 Flash-Lite is the cheaper option. For maximum context length, Gemini 3.1 Flash-Lite supports 1,000,000 tokens. Use the comparison table above to find the right fit for your workload.