Gemini 3.8 Flash API

Gemini 3.8 Flash is Google’s most intelligent Flash model, engineered for long-horizon software engineering, autonomous agents and complex enterprise workflows, at Flash speed and cost efficiency.

Modalities: Image, TextText
In / Out price: $0.75/$3.75per 1M
Context window: 1.05M tokens
Released: Sep 2, 2026

Gemini 3.8 Flash overview

Gemini 3.8 Flash by Google

Gemini 3.8 Flash is Google's most intelligent Flash model, built for long-horizon software engineering, autonomous agents, and complex enterprise workflows.

Gemini 3.8 Flash specs

Model ID: google/gemini-3.8-flash
Developer: Google
Context window: 1,048,576 tokens
Max output: 65,536 tokens
Input: Image, Text
Output: Text
API: OpenAI-compatible, base URL https://api.aimlapi.com/v1

What Is Gemini 3.8 Flash API?

Gemini 3.8 Flash, internally codenamed "Skimaki," is Google's most intelligent Flash model, released September 2, 2026, the third Flash update in about five weeks, following 3.6 Flash (July 21) and 3.7 Flash (August 13). It's engineered for long-horizon software engineering, autonomous agents, and complex enterprise workflows, at Flash speed and cost efficiency. Google also released a cybersecurity-focused sibling, Gemini 3.8 Flash Cyber, alongside it.

Technical Reference

Developer	Google
Model ID	google/gemini-3.8-flash
Context window	1,048,576 tokens
Max output	65,536 tokens
Supported inputs	Image, Text
Output	Text

What Gemini 3.8 Flash Brings to the Table

Strong agentic coding benchmarks
Google reports Gemini 3.8 Flash ahead of Anthropic's Opus 5 and OpenAI's GPT-5.6 Sol on several practical benchmarks, including Vals Finance Agent v2 (61.4% vs 58.6% and 53.8%), CharXiv Reasoning (86.2% vs 83.7%), and LVBench agentic mode (87.8% vs 75.4%).

Built for long-running agentic loops
Designed for multi-step orchestration, where an agent breaks a complex task into sequential actions and executes them with less human hand-holding, code generation, refactoring, and production-ready agents are the headline use cases.

Same speed and cost as 3.7 Flash
Google says the coding, agentic, and reasoning upgrades come at the same speed and low cost as the previous Flash release.

Sources: blog.google, 9to5google.com, officechai.com

Use cases

Gemini 3.8 Flash is documented as suited for long-horizon software engineering, including real-world coding benchmarks and complex multi-file refactoring. It is also suited for autonomous agents, with resilient multi-step planning and tool orchestration workflows.

It is documented for complex enterprise workflows, including demanding domain tasks and large-scale data pipelines with deep reasoning and high factual rigor. Google also describes it as well-suited for general-purpose, production-ready agents and agentic knowledge workflows.

It is additionally presented for interactive app building and rich visual experiences, including design adherence, interactive components, screenshots-to-app workflows, and 3D/physics-oriented app creation.

Capabilities

Reasoning
Streaming
Structured outputs
Function calling
Vision

Gemini 3.8 Flash benchmarks by Artificial Analysis

See how Gemini 3.8 Flash compares in intelligence, generation speed, cost per task and latency. Data retrieved Nov 3, 2026.

Intelligence#20 / 5030.5Index v5.0 Speed#73 / 219137Output tokens / second Cost per task#43 / 44$7.77USD / benchmark task Latency#212 / 21626.19Seconds to first token

Intelligence

Index v5.0

Speed

Output tokens / second

Cost per task

USD / benchmark task

Benchmark results

Compare 6 models available on AI/ML API across 5 independent benchmarks.

Humanity's Last Exam

Expert-written questions across academic subjects.

Gemini 3.8 Flash API pricing

Gemini 3.8 Flash pricing in US dollars
Usage	Price	Unit
Input	$0.75	1M tokens
Output	$3.75	1M tokens
Cached input	$0.075	1M tokens

Prices from the AI/ML API price list, checked on Nov 4, 2026.

Gemini 3.8 Flash vs other models: token prices

AI/ML API input and output rates for 5 models, per million tokens.

AI/ML API model prices in USD per million tokens
Model	Input	Output
Gemini 3.8 Flash	$0.75	$3.75
Gemini 3.5 Flash Lite	$0.3	$2.5
Gemini 3.7 Flash	$0.75	$3.75
Gemini 3.6 Flash	$1.5	$7.5
Gemini 4 Argon	$2	$10

How to use the Gemini 3.8 Flash API

View docs

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key

export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl 'https://api.aimlapi.com/v1/chat/completions' \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "google/gemini-3.8-flash",
  "messages": [
    {
      "role": "user",
      "content": "Write a haiku about the ocean."
    }
  ]
}'

import os
import requests

headers = {
    "Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
    "Content-Type": "application/json",
}
payload = {
    "model": "google/gemini-3.8-flash",
    "messages": [
        {
            "role": "user",
            "content": "Write a haiku about the ocean."
        }
    ]
}

response = requests.post("https://api.aimlapi.com/v1/chat/completions", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())

const response = await fetch("https://api.aimlapi.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "google/gemini-3.8-flash",
    "messages": [
      {
        "role": "user",
        "content": "Write a haiku about the ocean."
      }
    ]
  }),
});

if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());

All posts

Gemini 3.8 Flash FAQ

What is the context window of Gemini 3.8 Flash?

Gemini 3.8 Flash has a 1,048,576 tokens context window and can return up to 65,536 tokens.

What inputs and outputs does Gemini 3.8 Flash support?

Gemini 3.8 Flash takes image, text as input and returns text.

What is the model ID for Gemini 3.8 Flash?

Use google/gemini-3.8-flash as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.

When was Gemini 3.8 Flash released?

Gemini 3.8 Flash became available on September 2, 2026.

How much does Gemini 3.8 Flash cost?

Gemini 3.8 Flash costs $0.75 input and $3.75 output per 1M tokens on AI/ML API, billed as you go with no subscription.

Does Gemini 3.8 Flash support streaming?

Yes, Gemini 3.8 Flash can stream responses as they are generated.

Can Gemini 3.8 Flash read images?

Yes, Gemini 3.8 Flash accepts image input alongside text.

Who created Gemini 3.8 Flash?

Gemini 3.8 Flash was built by Google.

Start building with Gemini 3.8 Flash

Get API key

Gemini 3.8 Flash API

google/gemini-3.8-flash

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key

export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl 'https://api.aimlapi.com/v1/chat/completions' \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "google/gemini-3.8-flash",
  "messages": [
    {
      "role": "user",
      "content": "Write a haiku about the ocean."
    }
  ]
}'

import os
import requests

headers = {
    "Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
    "Content-Type": "application/json",
}
payload = {
    "model": "google/gemini-3.8-flash",
    "messages": [
        {
            "role": "user",
            "content": "Write a haiku about the ocean."
        }
    ]
}

response = requests.post("https://api.aimlapi.com/v1/chat/completions", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())

const response = await fetch("https://api.aimlapi.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "google/gemini-3.8-flash",
    "messages": [
      {
        "role": "user",
        "content": "Write a haiku about the ocean."
      }
    ]
  }),
});

if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());

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Gemini 3.8 Flash API

Gemini 3.8 Flash overview

Gemini 3.8 Flash by Google

Gemini 3.8 Flash specs

What Is Gemini 3.8 Flash API?

Technical Reference

What Gemini 3.8 Flash Brings to the Table

Use cases

Capabilities

Gemini 3.8 Flash benchmarks by Artificial Analysis

Intelligence

Speed

Cost per task

Benchmark results

Humanity's Last Exam

GPQA Diamond

Terminal-Bench 4.0

AA-LCR

SciCode

Gemini 3.8 Flash API pricing

Gemini 3.8 Flash vs other models: token prices

How to use the Gemini 3.8 Flash API

Build with your agent

1Get your API key

2Make your first request

Related articles

Gemini 3.8 Flash FAQ

Start building with Gemini 3.8 Flash

Gemini 3.8 Flash API

Build with your agent

1Get your API key

2Make your first request

Gemini 3.8 Flash API

Gemini 3.8 Flash overview

Gemini 3.8 Flash by Google

Gemini 3.8 Flash specs

What Is Gemini 3.8 Flash API?

Technical Reference

What Gemini 3.8 Flash Brings to the Table

Use cases

Capabilities

Intelligence

Speed

Cost per task

Benchmark results

Humanity's Last Exam

GPQA Diamond

Terminal-Bench 4.0

AA-LCR

SciCode

Gemini 3.8 Flash API pricing

Gemini 3.8 Flash vs other models: token prices

How to use the Gemini 3.8 Flash API

Build with your agent

1Get your API key

2Make your first request

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