GoogleGemini 3.1 Flash Lite pricing
$0.25 per 1M input tokens and $1.50 per 1M output tokens. In real work that is 0.25¢ per chat answer and 0.51¢ to summarize a 20-page PDF.
What Gemini 3.1 Flash Lite costs per task
Token counts estimated from a measured model of the same lab (Gemini 3.8 Flash), rescaled by tokenizer. Reasoning tokens are billed as output.
| Task | Cost | Tokens used | Price rank | Basis |
|---|---|---|---|---|
| Answer a chat question | 0.25¢$2.46 / 1,000 | 35 in · 788 out · 843 reasoning | 174 of 336 | estimated |
| Reply to a customer email | 0.09¢$0.90 / 1,000 | 271 in · 128 out · 424 reasoning | 161 of 336 | estimated |
| Write a 1,500-word blog post | 0.54¢$5.39 / 1,000 | 52 in · 2,621 out · 964 reasoning | 138 of 336 | estimated |
| Write 10 product descriptions | 0.45¢$4.49 / 1,000 | 293 in · 1,127 out · 1,817 reasoning | 138 of 336 | estimated |
| Translate 1,000 words | 0.70¢$7.02 / 1,000 | 1,308 in · 1,297 out · 3,167 reasoning | 152 of 336 | estimated |
| Proofread one page (500 words) | 0.18¢$1.82 / 1,000 | 706 in · 653 out · 443 reasoning | 140 of 336 | estimated |
| Summarize a 20-page PDF | 0.51¢$5.06 / 1,000 | 12,741 in · 535 out · 713 reasoning | 128 of 336 | estimated |
| Extract data from an invoice | 0.23¢$2.34 / 1,000 | 452 in · 539 out · 943 reasoning | 168 of 336 | estimated |
| Analyze a 200-row spreadsheet | 1.4¢$13.75 / 1,000 | 6,304 in · 1,018 out · 7,100 reasoning | 123 of 336 | estimated |
| Answer from 5 retrieved documents (RAG) | 0.42¢$4.15 / 1,000 | 3,608 in · 669 out · 1,499 reasoning | 153 of 336 | estimated |
| Classify 100 support tickets | 1.0¢$10.29 / 1,000 | 1,397 in · 571 out · 6,059 reasoning | 207 of 336 | estimated |
| Review 500 lines of code | 0.44¢$4.41 / 1,000 | 5,207 in · 2,074 out | 71 of 336 | estimated |
| Write a SQL query | 0.24¢$2.42 / 1,000 | 135 in · 546 out · 1,043 reasoning | 176 of 336 | estimated |
| Run a 50-step coding agent | 17¢$166 / 1,000 | 2,194,987 in · 14,715 out · 47,150 reasoning | 80 of 336 | modeled |
Price at every provider
List prices per 1M tokens (input / output) at each host serving Gemini 3.1 Flash Lite through OpenRouter today. Hosts can differ in quantization, context and speed.
| Provider | Input / output | Cached input | Context | Uptime |
|---|---|---|---|---|
Googleunknown | $0.12 / $0.75 | $0.013 | 1M | 20% |
Google AI Studiounknown | $0.12 / $0.75 | $0.013 | 1M | 100% |
Google AI Studiounknown | $0.25 / $1.50 | $0.025 | 1M | 100% |
Googleunknown | $0.25 / $1.50 | $0.025 | 1M | 100% |
Googleunknown | $0.28 / $1.65 | $0.028 | 1M | 100% |
Googleunknown | $0.28 / $1.65 | $0.028 | 1M | 100% |
Googleunknown | $0.45 / $2.70 | $0.045 | 1M | 100% |
Google AI Studiounknown | $0.45 / $2.70 | $0.045 | 1M | 100% |
Price history
First seen in our price history on May 13, 2026 at $0.25 input / $1.50 output. The list price has not changed since.
FAQ
How much does Gemini 3.1 Flash Lite cost?
Gemini 3.1 Flash Lite costs $0.25 per 1 million input tokens and $1.50 per 1 million output tokens, with cached input at $0.025 (list price on Oct 18, 2026). In practice one chat answer costs about 0.25¢ and summarizing a 20-page PDF about 0.51¢.
Where is Gemini 3.1 Flash Lite cheapest?
Among 8 providers we track, the lowest list price today is at Google: $0.12 input and $0.75 output per 1M tokens.
Does Gemini 3.1 Flash Lite charge for reasoning tokens?
Yes. Reasoning (thinking) tokens are billed as output tokens. That is why the cost per task can be much higher than the visible answer suggests - our task costs include them.
Is the Gemini 3.1 Flash Lite cost per task measured or estimated?
Estimated: Gemini 3.1 Flash Lite was not run directly. Tokens come from Gemini 3.8 Flash and are rescaled by the tokenizer of Google. Real usage can differ.