API cost decision in 10 seconds
Gemini 3.1 Flash Lite vs 🔥Gemini 3 Flash Preview
Pick Gemini 3.1 Flash Lite when budget is the priority.
Pricing data updated:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Gemini 3.1 Flash Lite when budget is the priority.
On the standard 1M input plus 500K output workload, Gemini 3.1 Flash Lite is estimated at $1 vs $2 for Gemini 3 Flash Preview, saving $1 (50% lower).
Cost-first pickGemini 3.1 Flash Lite
Context-first pickTie
Sample savings$150%
10x traffic gap$10
The reported context window is tied, so cost and provider fit carry more weight. At 10x that traffic, the same price gap is about $10. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Gemini 3.1 Flash Lite stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Gemini 3.1 Flash Lite | Gemini 3 Flash Preview |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Gemini 3.1 Flash Lite | $2 | $4 |
| Balanced workload | 1M input + 1M output | Gemini 3.1 Flash Lite | $1.75 | $3.5 |
| Output-heavy chatbot | 1M input + 5M output | Gemini 3.1 Flash Lite | $7.75 | $15.5 |
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
Gemini 3.1 Flash Lite has the lower input price, Gemini 3.1 Flash Lite has the lower output price, and Tie offers the larger context window.
For a 1M input token plus 500K output token workload, the estimated API cost is $1 for Gemini 3.1 Flash Lite and $2 for Gemini 3 Flash Preview.
Choose Gemini 3.1 Flash Lite when you care most about lower input-token price, and lower output-token price.
Choose Gemini 3 Flash Preview when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
| Feature | Gemini 3.1 Flash Lite (Google) | 🔥Gemini 3 Flash Preview (Google) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.25 | $0.5 |
| Completion Price per 1M tokens | $1.5 | $3 |
| Sample Workload Cost 1M input + 500K output | $1 | $2 |
| Context Window | 1.05M | 1.05M |
| Release Date | 2026-05-07 | 2025-12-17 |
| Popularity | #7 |
Gemini 3.1 Flash Lite is Google’s GA high-efficiency multimodal model optimized for low-latency, high-volume workloads. It supports text, image, video, audio, and PDF inputs, and is designed for lightweight agentic...
Gemini 3 Flash Preview is a high speed, high value thinking model designed for agentic workflows, multi turn chat, and coding assistance. It delivers near Pro level reasoning and tool...
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Gemini 3.1 Flash Lite | On the standard 1M input plus 500K output workload, Gemini 3.1 Flash Lite is estimated at $1 vs $2 for Gemini 3 Flash Preview, saving $1 (50% lower). |
| High-volume input processing | Gemini 3.1 Flash Lite | Lower prompt-token price matters most when prompts or retrieved passages dominate the bill. |
| Long responses and chatbots | Gemini 3.1 Flash Lite | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Tie | A larger context window leaves more room for retrieved passages and source files. |