Short answer
In the Gemini app, a personal account without a Google AI plan can select Flash-Lite or choose Auto. Google says Auto usually uses Flash-Lite for quick answers and may use Flash or Pro for prompts that need more reasoning. Access can depend on your account and available usage; work or school accounts may follow their Workspace license. (Google Gemini Apps Help)
For the Gemini API, Google offers free input and output tokens for certain models, subject to model-specific limits. A dated third-party pricing snapshot lists Gemini 3.5 Flash-Lite (gemini-3.5-flash-lite) as free, but the current Google model-level pricing entry for that specific ID could not be confirmed here. Check the live pricing row before budgeting for it. (Google API pricing; third-party pricing snapshot)
App vs. API at a glance
| Where you use Gemini | What can be free | What to keep in mind |
|---|---|---|
| Gemini app | Flash-Lite is directly selectable on the no-plan row; Auto is also listed. | Auto may use Flash or Pro for some prompts. Access and limits can vary. |
| Gemini API / AI Studio | Google offers free access to certain models, with free input and output tokens up to each model’s free-tier limits. | Eligibility is model-specific. The dated third-party listing of Gemini 3.5 Flash-Lite is not confirmation of its current Google pricing row. Free-tier content may be used to improve Google products. |
Which Gemini model is free in the app?
Google’s model-availability help page lists Flash-Lite and Auto for personal accounts without a Google AI plan. With Auto enabled, Google says most prompts use Flash-Lite, while prompts needing more reasoning may use Flash or Pro. If you turn Auto off, responses use Flash-Lite. Access depends on your plan and remaining usage and may change. (Google Gemini Apps Help)
So the simplest answer is: Flash-Lite is the free model you can select directly; Auto is another no-plan option that may select a model for the prompt. That does not mean every user can manually select Flash or Pro without a paid plan.
Google describes Flash-Lite as suited to quick everyday answers and lightweight tasks. For personal accounts, usage limits are compute-based rather than a fixed message count: prompt complexity, models and features used, and chat length can affect usage. Google says limits refresh every five hours until the weekly limit is reached. (Google Gemini Apps limits)
Which Gemini models are free through the API?
Google’s API billing guide confirms a Free tier for an active project or free trial, with access to certain models up to their individual free-tier rate limits. Google’s pricing page describes free input and output tokens for limited access to certain models. Neither statement means every model or API request is free. (Google API billing guide; Google API pricing)
For a specific example, a third-party pricing page says it read Google’s pricing information on October 16, 2026, and lists Gemini 3.5 Flash-Lite among models free of charge on the API tier. Google’s model documentation identifies its stable API model ID as gemini-3.5-flash-lite, but model availability and stable status do not establish its price. Treat its current free-tier eligibility as unconfirmed until you check that exact ID’s current Free Tier entry in Google’s pricing table. The available information does not establish any regional restriction for this model. (BenchLM’s dated pricing snapshot; Google model documentation; Google API pricing)
A free API key and free inference are separate things. Google offers a no-cost API key, but having a key alone does not show that a particular model or request is free. Check the current Free Tier entry for the exact model ID before estimating API costs. (Google Cloud Gemini page; Google API pricing)
Is the free API tier suitable for production?
Treat free API access as a way to try a model or prototype—not as a production capacity or cost guarantee. Google says Free Tier access is limited to certain models and their rate limits; its pricing page presents Paid access for production applications that need higher volumes and advanced features. Check the active limits for your project rather than assuming a fixed number of free requests. (Google API billing guide; Google API pricing)
Data use is another budget and deployment consideration. Google says Free Tier content may be used to improve its products. Google’s billing guide says Paid Tier prompts and responses are not used for that purpose under the linked terms. However, a third-party pricing snapshot reports an exception for Contributor rows; check the exact pricing row and applicable terms for the model and tier you plan to use before sending sensitive data. (Google API pricing; Google API billing guide; BenchLM’s dated snapshot)
A practical decision:
- Trying prompts or testing an idea? A free-tier model may fit if its current pricing row says it is free and the project’s limits meet your needs.
- Building an application that needs predictable volume or particular data-use terms? Check the current model prices, project limits, and applicable terms before launch. Google’s billing guide says moving to Paid access requires linking a billing account and prepaying at least $5, or the equivalent in another currency. (Google API billing guide)
How to check before you rely on a free model
- For the Gemini app: Open the model selector and check whether Flash-Lite or Auto is available on your account. Work or school accounts may have different access based on their Workspace license. (Google Gemini Apps Help)
- For the API: Find the exact model name or ID in Google’s Gemini API pricing table and check its Free Tier entry. Do not infer API pricing from the consumer app or from having a free API key. (Google API pricing)
- Before production use: Check your project’s active limits and the current data-use terms for the chosen model and tier. Free access alone does not establish production capacity or a service guarantee. (Google API billing guide)
Bottom line: For the free Gemini app, Flash-Lite is directly selectable and Auto is also available; Auto may use Flash or Pro for some prompts. For the Gemini API, selected models can have free token usage under limits. A dated third-party source lists gemini-3.5-flash-lite as free, but its current Google pricing eligibility remains unconfirmed here—check the live pricing row before budgeting or deploying.
Sources
About Gemini models — Gemini Apps Help
Gemini Apps limits & feature availability — Gemini Apps Help
Gemini Developer API pricing — Google AI Studio
Gemini 3.5 Flash-Lite — Gemini API
Google AI Studio Free Tier: Gemini API Limits & Free Models
Google AI Studio vs. Gemini platform vs. Gemini — Google Cloud