Gemini 3.5 Flash API

google/gemini-3-5-flash
Gemini 3.5 Flash model narrows the gap between Flash-tier speed and Pro-level reasoning.
Context
1.05M tokens
Input
$0.65 / 1M tokens
Output
$3.9 / 1M tokens

How to use Gemini 3.5 Flash API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to google/gemini-3-5-flash.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/chat/completions",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "google/gemini-3-5-flash",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ]
    },
)
print(r.json())
const r = 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-3-5-flash",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ]
  }),
});
console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"google/gemini-3-5-flash","messages":[{"role":"user","content":"Hello!"}]}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

Gemini 3.5 Flash API Pricing

TypePrice
Input
$0.65 / 1M tokens
Output
$3.9 / 1M tokens
Cached input
$0.065 / 1M tokens

Gemini 3.5 Flash Benchmarks

BenchmarkScoreWhat it measuresSourceRetrieved
Intelligence
33.6
Composite score across standardised reasoning, knowledge and problem-solving evaluations, measured independently by Artificial AnalysisSourceSeptember 12, 2026

Gemini 3.5 Flash vs other models

ModelInputOutputContextBest for
$0.65 / 1M tokens
$3.9 / 1M tokens
1.05M tokens
Reasoning + agents
$6.5 / 1M tokens
$39 / 1M tokens
1.05M tokens
Reasoning + agents
$2.6 / 1M tokens
$13 / 1M tokens
1M tokens
Balanced coding + agents
$3.9 / 1M tokens
$19.5 / 1M tokens
1M tokens
Long-context, multimodal & agentic workflows

Frequently asked questions

Gemini 3.5 Flash has a 1,048,576 tokens context window and can return up to 65,536 tokens.

Gemini 3.5 Flash takes audio, image, text, video as input and returns audio, text.

Use google/gemini-3-5-flash as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.

Gemini 3.5 Flash is priced at input $0.65 / 1M tokens, output $3.9 / 1M tokens, cached input $0.065 / 1M tokens.

Yes, Gemini 3.5 Flash can stream responses as they are generated.

Yes, Gemini 3.5 Flash accepts image input alongside text.

Gemini 3.5 Flash was built by Google.

It supports function calling, parallel tool calls, and structured output generation.

Start building with Gemini 3.5 Flash

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