Gemini 3.8 Flash: Google's Fast, Low-Cost Model Explained

By the ChatGBot Team · Published October 12, 2026

Google has released Gemini 3.8 Flash, the newest entry in its cheap-and-fast Flash line. It keeps a huge context window, handles text, images, video, audio and PDFs, and is priced to run at scale. Here is what it does, what it costs, and where it fits.

What is Gemini 3.8 Flash?

Gemini 3.8 Flash is Google's latest lightweight model, released on September 2, 2026. The Flash line is built for speed and low cost rather than maximum reasoning power, so it suits high-volume jobs like classification, extraction, summarizing and chat where you care about price per task.

A big context window and full multimodal input

It carries about a 1 million token context window and can return up to roughly 65,000 tokens in a single response. It accepts text, images, video, audio and PDFs, and supports function calling and structured JSON output, which makes it practical for real applications, not just chat.

What it costs

Reported standard pricing is around $0.75 per million input tokens and $3.75 per million output tokens as an introductory rate, with coverage suggesting those prices roughly double at the start of 2027. Batch processing is cheaper, at about half the standard rate. Prices from third-party trackers vary, so confirm against Google's official pricing page before budgeting.

The catch: verbosity

The per-token price is low, but Flash can be chatty. Independent testing suggests it sometimes uses more tokens to reach an answer, so the real cost per finished task can be higher than the sticker rate implies. For high-volume pipelines, it is worth measuring tokens per completed task, not just the headline price.

Where Gemini 3.8 Flash fits

Flash is the value option in Google's lineup, meant to pair with the heavier Gemini models for harder work. If you are weighing it against other assistants, our Gemini vs ChatGPT and ChatGPT vs Gemini vs Claude guides break down the trade-offs.

One quick note

Gemini is Google's own product and is not part of ChatGBot. ChatGBot bundles GPT, Claude, DeepSeek, Qwen and GLM under a single subscription, which matters if you would rather compare several models in one place than keep separate apps.

Frequently asked questions

What is Gemini 3.8 Flash? It is Google's fast, low-cost model released on September 2, 2026, with a roughly 1 million token context window and support for text, image, video, audio and PDF input.

How much does Gemini 3.8 Flash cost? Reported introductory pricing is about $0.75 per million input tokens and $3.75 per million output tokens, with batch processing around half that. Check Google's pricing page for the current rate.

Is Flash better than the full Gemini models? Not for the hardest reasoning. Flash trades some depth for speed and low cost, so it shines on high-volume, simpler tasks while larger models handle complex work.

Is Gemini included in ChatGBot? No. Gemini is a Google product. ChatGBot gives you GPT, Claude, DeepSeek, Qwen and GLM in one subscription so you can switch between those models in one place.

Still deciding which model to use? Our guide to the best AI in 2026 breaks it down by task.

Compare the top models in one app

Instead of juggling separate tools, ChatGBot puts GPT, Claude, DeepSeek, Qwen and GLM under one subscription, so you can test answers side by side and switch models whenever the task changes.