# Gemini 3.1 Flash-Lite API pricing Gemini 3.1 Flash-Lite is an earlier Google model, still sold. It costs $0.25 per million tokens it reads and $1.50 per million it writes, $0.563 on a mix of 3 read for each 1 written. Google's newest models are Gemini 4 Argon, Gemini 3.8 Flash and Gemini 3.5 Flash-Lite. Below are every price Google lists for it, and what 8 everyday jobs cost a month on it. - Page: https://tecyfy.com/prices/gemini-3-1-flash-lite - Maker: Google ## Price per million tokens, in US dollars | | Price | | --- | --: | | Input | $0.25 | | Cached input | $0.025 | | Cache write | not listed | | Output | $1.50 | | Blend, 3 read for each 1 written | $0.563 | | Batch input | not listed | | Batch output | not listed | | Context window, tokens | 1.05M | | Longest answer, tokens | 66K | | Capability score (Epoch Capabilities Index; GPT-5 is 150) | 144 | Audio input is $0.50. ## What 8 everyday jobs cost a month Each job at its usual runs a day, for 30 days, at the standard price. | Job | Tokens in, out, runs a day | A run | A month | | --- | --- | --: | --: | | A chat question | 300, 500, 100 | 0.083 cents | $2.48 | | A hard question, with thinking | 300, 1,400, 100 | 0.22 cents | $6.52 | | A long report, summarised | 60,000, 2,000, 20 | 1.8 cents | $10.80 | | A 40-turn agent task | 2,800,000, 40,000, 10 | 19 cents | $57.90 | | A support bot's reply | 4,000, 300, 2,000 | 0.1 cents | $60.00 | | Sort a message into a category | 250, 5, 50,000 | 0.007 cents | $105 | | Read an invoice into fields | 1,500, 250, 1,000 | 0.075 cents | $22.50 | | Review a pull request | 25,000, 4,500, 50 | 1.3 cents | $19.50 | ## Cheaper models that score as well as Gemini 3.1 Flash-Lite - [Claude Haiku 5.5](https://tecyfy.com/prices/claude-haiku-5-5.md), Anthropic: $0.20 per million at 3:1, score 159 - [GPT-6 Luna](https://tecyfy.com/prices/gpt-6-luna.md), OpenAI: $0.20 per million at 3:1, score 156 - [DeepSeek V4.1 Flash](https://tecyfy.com/prices/deepseek-flash.md), DeepSeek: $0.525 per million at 3:1, score 156 ## Questions ### How much does Gemini 3.1 Flash-Lite cost? Gemini 3.1 Flash-Lite costs $0.25 per million input tokens, the text it reads, and $1.50 per million output tokens, the text it writes, thinking included. On a mix of 3 tokens read for each 1 written, that is $0.563 per million. ### How much does cached input cost on Gemini 3.1 Flash-Lite? Text Gemini 3.1 Flash-Lite reads again from the cache costs $0.025 per million tokens, against $0.25 the first time. Google lists no separate price for writing to the cache. ### Does Gemini 3.1 Flash-Lite have a batch price? Not on Google's price page, which lists no batch price for Gemini 3.1 Flash-Lite. The cache still lowers the price of text it reads again. ### What is the context window of Gemini 3.1 Flash-Lite? Gemini 3.1 Flash-Lite holds 1.05M tokens at once, about 1,600 pages of English text, and writes up to 66K tokens in one answer. The window holds your instructions, the files you attach, the conversation so far and the answer. ### How good is Gemini 3.1 Flash-Lite? Gemini 3.1 Flash-Lite scores 144 on the Epoch Capabilities Index, an independent score from Epoch AI that combines over 50 benchmarks, with a range of doubt from 142 to 146 (GPT-5 is 150). One score is an average; test it on 10 tasks of your own. ### Is there a cheaper model as good as Gemini 3.1 Flash-Lite? Claude Haiku 5.5 from Anthropic scores 159 on the Epoch Capabilities Index, about as well or better, and costs $0.20 per million on a mix of 3 tokens read for each 1 written: Gemini 3.1 Flash-Lite costs 2.8 times as much. Test both on your own work before you switch. ### Should I still use Gemini 3.1 Flash-Lite? It is still sold, so it keeps working, but Google's newest models are Gemini 4 Argon, Gemini 3.8 Flash and Gemini 3.5 Flash-Lite. Compare its price with theirs below, and run your own tasks on the newer model before you move. ### What does a support bot cost a month on Gemini 3.1 Flash-Lite? At 2,000 replies a day, each reading 4,000 tokens (50 percent of them from cache) and writing 300, a support bot costs 0.1 cents a reply on Gemini 3.1 Flash-Lite, $60.00 a month. ### What does an AI agent task cost on Gemini 3.1 Flash-Lite? One 40-turn task that reads 2,800,000 tokens in all, 90 percent of them from cache, and writes 40,000, costs 19 cents on Gemini 3.1 Flash-Lite. At 10 tasks a day that is $57.90 a month. ## Sources - [Google: API prices](https://ai.google.dev/gemini-api/docs/pricing) - [Epoch Capabilities Index, by Epoch AI (CC BY 4.0)](https://epoch.ai/benchmarks/eci) - Every model's prices as [JSON](https://tecyfy.com/prices.json) or [CSV](https://tecyfy.com/prices.csv), free to use ## Compare - [Gemini 3.1 Flash-Lite vs Gemini 4 Argon](https://tecyfy.com/prices/compare/gemini-3-1-flash-lite-vs-gemini-4-argon.md) - [Gemini 3.1 Flash-Lite vs Gemini 3.8 Flash](https://tecyfy.com/prices/compare/gemini-3-1-flash-lite-vs-gemini-3-8-flash.md) - [Gemini 3.1 Flash-Lite vs Gemini 3.5 Flash-Lite](https://tecyfy.com/prices/compare/gemini-3-1-flash-lite-vs-gemini-3-5-flash-lite.md) ## Google's other models - [Gemini 4 Argon](https://tecyfy.com/prices/gemini-4-argon.md) - [Gemini 3.8 Flash](https://tecyfy.com/prices/gemini-3-8-flash.md) - [Gemini 3.5 Flash-Lite](https://tecyfy.com/prices/gemini-3-5-flash-lite.md) - [Gemini 3.6 Flash](https://tecyfy.com/prices/gemini-3-6-flash.md) - [Gemini 3.1 Pro Preview](https://tecyfy.com/prices/gemini-3-1-pro-preview.md) - [Gemini 3 Flash Preview](https://tecyfy.com/prices/gemini-3-flash-preview.md) - [Gemini 2.5 Pro](https://tecyfy.com/prices/gemini-2-5-pro.md) - [Gemini 2.5 Flash](https://tecyfy.com/prices/gemini-2-5-flash.md) - [Gemini 2.5 Flash-Lite](https://tecyfy.com/prices/gemini-2-5-flash-lite.md)