Gemini 3.5 Flash
google/gemini-3.5-flashGemini 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.
- Input price
- $1.27
$1.50USD / 1M tokens - Output price
- $7.65
$9.00USD / 1M tokens - Context window
- 1M
- Max output
- 65.5K
Try the model
Playground
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Model card
Specifications
Pricing
- Input
- $1.27 / 1M tokens
- Output
- $7.65 / 1M tokens
- Cache read
- $0.13 / 1M tokens
Context & modalities
- Context window
- 1,048,576 tokens
- Max output
- 65,536 tokens
- Input
- Text, image
- Output
- Text
Capabilities
- Chat
- Supported
- Vision
- Supported
- Reasoning
- Supported
- Structured output
- Supported
- Function calling
- Supported
- Audio input
- Supported
Access
- Provider
- Model ID
- google/gemini-3.5-flash
- Execution
- sync
- Base URL
- https://api.sandbase.ai
- API
- Chat Completions API
- Endpoint
- /v1/chat/completions
Independent evaluations
Benchmarks
Scores on standardized evaluations, compared with other models on SandBase.
Metrics sourced from Artificial Analysis · Intelligence Index v4.3
Start building
Send your first request
OpenAI-compatible endpoint with unified authentication and usage tracking.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(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
| Model | Context | Input / 1M | Output / 1M | Released |
|---|---|---|---|---|
Gemini 3.5 FlashThis model Google | 1M | $1.27 | $7.65 | May 19, 2026 |
Google | 64K | $1.50 | $7.50 | Oct 8, 2026 |
Google | — | Coming soon | Coming soon | Coming soon |
Google | 1M | $1.50 | $7.50 | Sep 2, 2026 |
Google | 1M | $1.50 | $7.50 | Aug 13, 2026 |
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.
How does Google Gemini 3.5 Flash score on benchmarks?
Google Gemini 3.5 Flash scores 32.6 on the Artificial Analysis Intelligence Index (v4.3), ranking #37 of 84 models on SandBase; Coding Index 70.1, Agentic Index 26.0. Source: Artificial Analysis, measured as Gemini 3.5 Flash (High).
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.