Gemini 3.1 Flash-Lite API pricing
Gemini 3.1 Flash-Lite costs $0.25 per million input tokens and $1.5 per million output tokens. A typical chatbot request (about 1,500 input + 400 output tokens) costs $0.00099, or $0.99 per 1,000 requests.
0 characters0 words0 tokens (GPT o200k)
| Model | Per month |
|---|---|
| Gemini 3.1 Flash-Lite |
≈ = estimated token count: only OpenAI publishes its tokenizer. Claude counts use Anthropic’s published ratios; use the count_tokens API for an exact number.
Gemini 3.1 Flash-Lite price per million tokens
USD, Google standard tier. Prices checked on October 28, 2026.
| Token type | Price per 1M | With Batch API |
|---|---|---|
| Input | $0.25 | $0.125 |
| Cached input | $0.025 | $0.0125 |
| Output | $1.5 | $0.75 |
Model ID: gemini-3.1-flash-lite · Source: ai.google.dev
What a Gemini 3.1 Flash-Lite request costs
| Request | Per request | Per 1,000 |
|---|---|---|
| Short chat reply 500 input + 200 output tokens | $0.00043 | $0.43 |
| Chatbot turn with context 1,500 input + 400 output tokens | $0.00099 | $0.99 |
| Document Q&A (RAG) 8,000 input + 500 output tokens | $0.0029 | $2.85 |
| Long-document summary 150,000 input + 2,000 output tokens | $0.04 | $42.38 |
Token counts are measured with GPT's o200k tokenizer and converted for Gemini 3.1 Flash-Lite (see below). No caching or batch discount.
Similarly priced models
| Model | Chatbot request | vs Gemini 3.1 Flash-Lite |
|---|---|---|
| GPT-5.6 Luna OpenAI | $0.00078 | −22% |
| GPT-5.4 nano OpenAI | $0.00080 | −19% |
| DeepSeek Flash DeepSeek | $0.00095 | −4% |
| GPT-5 mini OpenAI | $0.0012 | +18% |
| Mistral Large 3 Mistral | $0.0014 | +40% |
| Gemini 3.5 Flash-Lite Google | $0.0015 | +48% |
Frequently asked questions
How much does the Gemini 3.1 Flash-Lite API cost?
Gemini 3.1 Flash-Lite costs $0.25 per million input tokens and $1.5 per million output tokens on Google's standard tier. Prices checked on October 28, 2026.
How much does one Gemini 3.1 Flash-Lite request cost?
A typical chatbot request with about 1,500 input and 400 output tokens costs about $0.00099, or $0.99 per 1,000 requests. Paste your own prompt into the calculator on this page for an exact estimate.
Does Gemini 3.1 Flash-Lite support prompt caching?
Yes. Cached input costs $0.025 per million tokens, 90% less than regular input.
Does Gemini 3.1 Flash-Lite have a Batch API discount?
Yes: 50% off for requests sent through the Batch API, which may take up to 24 hours. That makes it $0.125 / $0.75 per million input / output tokens.
How are Gemini 3.1 Flash-Lite tokens counted?
Gemini 3.1 Flash-Lite's tokenizer is not published. We estimate about 1.05× the GPT o200k count for the same text.