Gemini 3.5 Flash

Name: Google Gemini 3.5 Flash
Price: 1.275 USD
Availability: InStock
Author: Google

15% OFFgoogle/gemini-3.5-flash

Gemini 3.5 Flash is the Flash model of Google's Gemini 3.5 family, introduced at Google I/O in May 2026. Google positions it as delivering frontier-level intelligence at Flash speed, built for sub-agent deployment, multi-step workflows and long-horizon tasks at scale, and particularly effective in rapid agentic loops with complex coding iterations. It takes text, image, video, audio and PDF input with text output; Google's model list now labels it a legacy Flash model behind 3.6, 3.7 and 3.8 Flash.

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Input price: $1.27~~$1.50~~USD / 1M tokens
Output price: $7.65~~$9.00~~USD / 1M tokens
Context window: 1M
Max output: 65.5K

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Image URL or upload

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1M context65.5K max outputVision

Input~~$1.50/M~~$1.27/MOutput~~$9.00/M~~$7.65/MCache read~~$0.15/M~~$0.13/M

15% OFF

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Model card

Specifications

Pricing

Input: $1.27 / 1M tokens
Output: $7.65 / 1M tokens
Cache read: $0.13 / 1M tokens

Context & modalities

Context window: 1,048,576 tokens
Max output: 65,536 tokens
Input: Text, image
Output: Text

Capabilities

Chat: Supported
Vision: Supported
Reasoning: Supported
Structured output: Supported
Function calling: Supported
Audio input: Supported

Access

Provider: Google
Model ID: google/gemini-3.5-flash
Execution: sync
Base URL: https://api.sandbase.ai
API: Chat Completions API
Endpoint: /v1/chat/completions

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Send your first request

OpenAI-compatible endpoint with unified authentication and usage tracking.

Production API

Chat Completions API endpoint

https://api.sandbase.ai/v1/chat/completions

Model ID

google/gemini-3.5-flash

# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
  -X POST "https://api.sandbase.ai/v1/chat/completions" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "model": "google/gemini-3.5-flash",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ],
  "max_tokens": 2048
}
SANDBASE_JSON
)
printf '%s\n' "$result"

Choose your model

Compare models

All language models

Model	Context	Input / 1M	Output / 1M	Released
Gemini 3.5 FlashThis model `Google`	1M	$1.27	$7.65	May 19, 2026
Gemini 4 Argon `Google`	1M	$4.00	$20.00	Oct 13, 2026
Nano Banana 2.1 (Gemini Nano Banana 2.1) `Google`	64K	$1.50	$7.50	Oct 8, 2026
Gemini 3.8 Flash `Google`	1M	$1.50	$7.50	Sep 2, 2026
Gemini 3.7 Flash `Google`	1M	$1.50	$7.50	Aug 13, 2026
Gemini 3.5 Flash Lite `Google`	1M	$0.30	$2.50	Jul 21, 2026

Questions

FAQ

How do I call Google Gemini 3.5 Flash through SandBase?

Create a SandBase API key, then send requests with the model ID "google/gemini-3.5-flash" to Chat Completions API (/v1/chat/completions) at https://api.sandbase.ai. The request examples on this page show the exact payload.

How much does Google Gemini 3.5 Flash cost?

$1.27 per 1M input tokens and $7.65 per 1M output tokens with the current 15% discount (list price $1.50 / $9), billed per request from your SandBase balance.

What is the context window of Google Gemini 3.5 Flash?

1M tokens of context, with up to 65.5K output tokens per response.

Which features does Google Gemini 3.5 Flash support?

Google Gemini 3.5 Flash supports vision (image input), reasoning, function calling, structured output. See Specifications above for the full list.

Do I need a separate Google account?

No. One SandBase API key and balance gives you access to Google Gemini 3.5 Flash and the other models in the catalog; you do not need to sign up with Google separately.