Gemini 3.5 Flash-Lite
Provider list prices: no platform markup, pay-as-you-go. These are official list prices. Logged-in customers may see effective prices including workspace discounts on /console/pricing. Effective input at a 70% cache-hit rate:$0.111/M. Implicit caching is on by default for current Gemini models (discounted automatically on cache hits), plus an explicit CachedContent API with storage-based billing for guaranteed savings.
Use Gemini 3.5 Flash-Lite in 30 seconds
OpenAI-compatible: swap the base_url, keep your SDK. POST /v1/chat/completions
from openai import OpenAI
client = OpenAI(
base_url="https://synthorai.io/v1",
api_key="sk-syn-...",
)
resp = client.chat.completions.create(
model="gemini-3.5-flash-lite",
messages=[{"role": "user", "content": "Summarize this diff"}],
)
print(resp.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://synthorai.io/v1",
apiKey: "sk-syn-...",
});
const resp = await client.chat.completions.create({
model: "gemini-3.5-flash-lite",
messages: [{ role: "user", content: "Summarize this diff" }],
});
console.log(resp.choices[0].message.content);curl https://synthorai.io/v1/chat/completions \
-H "Authorization: Bearer sk-syn-..." \
-H "Content-Type: application/json" \
-d '{
"model": "gemini-3.5-flash-lite",
"messages": [{"role": "user", "content": "Hello"}]
}'package main
import (
"context"
"fmt"
"github.com/openai/openai-go/v3"
"github.com/openai/openai-go/v3/option"
)
func main() {
client := openai.NewClient(
option.WithBaseURL("https://synthorai.io/v1"),
option.WithAPIKey("sk-syn-..."),
)
resp, _ := client.Chat.Completions.New(context.TODO(), openai.ChatCompletionNewParams{
Model: "gemini-3.5-flash-lite",
Messages: []openai.ChatCompletionMessageParamUnion{
openai.UserMessage("Summarize this diff"),
},
})
fmt.Println(resp.Choices[0].Message.Content)
}import com.openai.client.OpenAIClient;
import com.openai.client.okhttp.OpenAIOkHttpClient;
import com.openai.models.chat.completions.*;
OpenAIClient client = OpenAIOkHttpClient.builder()
.baseUrl("https://synthorai.io/v1")
.apiKey("sk-syn-...")
.build();
ChatCompletion resp = client.chat().completions().create(
ChatCompletionCreateParams.builder()
.model("gemini-3.5-flash-lite")
.addUserMessage("Summarize this diff")
.build());
System.out.println(resp.choices().get(0).message().content().orElse(""));About Gemini 3.5 Flash-Lite
Gemini 3.5 Flash-Lite is a generally available, low-latency multimodal model that Google's documentation describes as the fastest, lowest-cost model in the 3.5 family, optimized for high-throughput, low-cost execution such as subagent tasks and document parsing.
- It supports thinking and the built-in tool suite including Computer Use, takes text, image, video, and audio input across a 1M-token context window with 65,536 output tokens; the model page notes that temperature, top_p, and top_k are deprecated and ignored from this generation.
- Synthorai serves it through its OpenAI-compatible chat endpoint.
Specs & limits
| Max output (vendor spec) | 65,536 |
| Modalities | text + image + video + audio → text |
| Features | tools · structured_output · streaming · vision · batch · caching · reasoning · computer_use |
| Notable | GA; 1M-token context, 64K max output; the fastest, lowest-cost model in the 3.5 family, optimized for high-throughput low-cost execution (subagent tasks, document parsing); thinking and built-in tools incl. Computer Use. Note: temperature/top_p/top_k are deprecated and ignored from this generation. |
| Prompt caching | automatic + explicit · min 1,024-token prefix |
FAQ
Is the Gemini 3.5 Flash-Lite API free to try?
Yes: new accounts get 10 trial calls and up to $1 in free credit, no card required. At $0.3/M input tokens, that credit alone covers roughly 416 requests of ~8K tokens against Gemini 3.5 Flash-Lite.
What is Gemini 3.5 Flash-Lite best at?
Fastest, lowest-cost model in the 3.5 family, plus built for high-throughput subagents and parsing and 1M context, thinking, and built-in tools. See the About section for the full picture from the vendor's own release notes.
How much does Gemini 3.5 Flash-Lite cost?
Gemini 3.5 Flash-Lite costs $0.3 per million input tokens and $2.5 per million output tokens on Synthorai. That is the provider's list price, with no platform markup. Cached input tokens bill at $0.03/M.
Does Gemini 3.5 Flash-Lite support prompt caching?
Yes: automatic caching is on by default, with an explicit mode for guaranteed savings. Cached input tokens bill at $0.03/M vs $0.3/M uncached; prompts need a 1,024-token stable prefix to cache. Prompt caching guide →
How do I get access to Gemini 3.5 Flash-Lite?
Point your existing OpenAI SDK at base_url="https://synthorai.io/v1", set model="gemini-3.5-flash-lite", and you're done. One API key covers every model on the gateway.