GoogleText Generation/v1/ai/chat

Gemini 3.8 Flash API

Access Gemini 3.8 Flash through one API key. Google Most Intelligent Flash.

Gemini 3.8 Flash is Google's most intelligent Flash model, with significant gains over 3.7 Flash across software engineering, agentic tasks and multi-step reasoning. Gemini 3.8 Flash is the default Gemini for agents and coding assistants that need strong reasoning at Flash cost, and for any pipeline that ingests audio or video alongside text.

Full Docs Get API Key

Takes 30 seconds.

Gemini 3.8 Flash API pricing

Pay per request from your YepAPI balance — no subscription, no monthly minimum. Prices updated October 23, 2026.

Token type	Price
Input	$1.22 / 1M tokens
Output	$6.09 / 1M tokens
Context window	1.0M tokens

What it costs	Per job	Per 1,000
Chat reply1K input + 500 output tokens	$0.0043	$4.27
RAG answer8K input + 800 output tokens	$0.015	$14.63
Agent step with tools30K input + 2K output tokens	$0.049	$48.78
Long document summary100K input + 2K output tokens	$0.134	$134.18

4,900+

Developers

2.3M+

API calls served

184

Endpoints

$0.01

Per call

Yep, that's it.

Try it live

Send a message and see Gemini 3.8 Flash respond in real time.

POST/v1/ai/chatgoogle/gemini-3.8-flash

Message *

Max Tokens

Maximum tokens in the response.

Stream

Real-time tokens

Hit "Send Request" to see the response

Gemini 3.8 Flash specs

Provider	Google
Model ID	google/gemini-3.8-flash
Endpoint	/v1/ai/chat
Type	Text Generation
Context window	1.05M tokens
Max output	66K tokens
Reasoning	No
OpenAI-compatible	Yes — /v1/ai/chat/completions

How to get a Gemini 3.8 Flash API key

1
Create an account
Sign up at yepapi.com with Google or email. It takes about 30 seconds.
2
Create an API key
Open the dashboard, go to API Keys and create a key. Copy it — it starts with yep_sk_.
3
Call Gemini 3.8 Flash
Send a request to /v1/ai/chat with the x-api-key header and model "google/gemini-3.8-flash".
4
Pay as you go
Usage is billed per request from your balance. Top up any amount; there is no subscription.

Strengths

✓

Best Flash yet

Significant gains over Gemini 3.7 Flash on software engineering, agentic tasks and multi-step reasoning.

✓

Full multimodal input

Accepts text, images, files, audio and video in one prompt.

✓

1M token context

Handles up to 1,048,576 input tokens and returns up to 65,536 output tokens per call.

✓

Flash-tier price

$1.22 per 1M input and $6.09 per 1M output tokens.

Quick start

Copy this snippet and start making calls with Gemini 3.8 Flash.

const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "google/gemini-3.8-flash",
    "messages": [
      {
        "role": "user",
        "content": "Explain API gateways in 2 sentences."
      }
    ],
    "maxTokens": 256
  }),
});
const { data } = await res.json();
console.log(data.message.content);

Gemini 3.8 Flash vs similar models

Every model below runs on the same API key — switch by changing the model ID.

Model	Provider	Price	Context
Gemini 3.8 Flash	Google	$1.22 in / $6.09 out per 1M	1.0M
Gemma 4 26B	Google	$0.13 in / $0.44 out per 1M	262K
Gemini 2.5 Flash Lite	Google	$0.15 in / $0.59 out per 1M	1.0M
Gemma 4 31B	Google	$0.30 in / $0.59 out per 1M	262K
Gemini 3.1 Flash Lite	Google	$0.37 in / $2.22 out per 1M	1.0M
Gemini 2.5 Flash	Google	$0.44 in / $3.69 out per 1M	1.0M
Nemotron 3 Super	NVIDIA	$0 in / $0 out per 1M	262K
Qwen3.7 Flash	Qwen	$0.04 in / $0.19 out per 1M	1M

Why use Gemini 3.8 Flash through YepAPI?

✓One API key for all models — no separate accounts

✓OpenAI SDK compatible — just change the base URL

✓No monthly minimums — pay per token

✓Switch models with one line of code

✓Full provider passthrough — citations, search results, and all extras included

✓Streaming and non-streaming support on every model

✓Works with Cursor, Claude, LangChain, and any LLM tool

✓Unified billing across all providers

Gemini 3.8 Flash API — pricing, context window & access

Gemini 3.8 Flash is Google's most intelligent Flash model, with significant gains over 3.7 Flash across software engineering, agentic tasks and multi-step reasoning. It pairs a 1,048,576-token context window with up to 65,536 output tokens per response, at $1.22 per 1M input and $6.09 per 1M output tokens through YepAPI.

Through YepAPI you call Gemini 3.8 Flash on an OpenAI-compatible endpoint with a single key — the same key that reaches GPT-6, Claude, Gemini, Grok and the SEO, SERP and scraping APIs. Input: text, images, files, audio, video.

What is Gemini 3.8 Flash?

Gemini 3.8 Flash is Google's most intelligent Flash model, with significant gains over 3.7 Flash across software engineering, agentic tasks and multi-step reasoning. It keeps the Flash tier's price ($1.22 / $6.09 per 1M tokens) and full multimodal input — text, images, files, audio and video — with a 1,048,576-token context window and 65,536 output tokens. It accepts text, images, files, audio, video as input, handles up to 1,048,576 tokens of context and returns up to 65,536 output tokens per call.

Build with Gemini 3.8 Flash via YepAPI

YepAPI serves Gemini 3.8 Flash on the OpenAI-compatible /v1/ai/chat endpoint. Point your base URL at YepAPI, add your key, and set the model string to gemini-3.8-flash (or the full google/gemini-3.8-flash). Function calling, structured outputs and reasoning settings pass straight through, and switching to any other model on the platform is a one-string change per request.

Gemini 3.8 Flash API pricing — $1.22 / 1M input, $6.09 / 1M output

Gemini 3.8 Flash costs $1.22 per 1M input tokens and $6.09 per 1M output tokens through YepAPI, pay per token with no minimums. Failed calls are never charged, and every request is itemised in your dashboard API Logs so you can see exactly what a 65,536-token response cost.

Gemini 3.8 Flash use cases

Gemini 3.8 Flash is the default Gemini for agents and coding assistants that need strong reasoning at Flash cost, and for any pipeline that ingests audio or video alongside text.

Start generating in 30 seconds

Pay per call, no subscriptions.

Get API Key

What developers say

“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
Marcus T.
SEO Platform Founder

“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
Priya S.
Full-Stack Developer

“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Jake R.
Indie Hacker

Frequently asked questions

Gemini 3.8 Flash costs $1.22 per 1M input tokens and $6.09 per 1M output tokens through YepAPI, billed per request with no monthly fee. For example, a chat reply (1K input + 500 output tokens) costs about $0.0043.

Sign up at yepapi.com (Google or email, about 30 seconds), open the dashboard and create an API key. The same key works for Gemini 3.8 Flash and every other model — no separate Google account or waitlist.

Use "google/gemini-3.8-flash" as the model on /v1/ai/chat. The short alias "gemini-3.8-flash" also works.

Yes. Point the OpenAI SDK at https://api.yepapi.com/v1/ai with your YepAPI key and set model to "google/gemini-3.8-flash". Streaming works the same way, so existing OpenAI code only needs the base URL and key changed.

Gemini 3.8 Flash supports a 1.0M token context window with up to 66K output tokens per request.