Cheaper Gemini 3.5 Flash API Pricing in 2026
Updated 2026-06-23
Gemini 3.5 Flash is available through APIsRouter. Set your SDK Base URL to https://api.apisrouter.com/v1, use model ID gemini-3.5-flash, and inspect usage, cost, and errors in the console.
| API base URL | https://api.apisrouter.com/v1 |
|---|---|
| Interface | OpenAI-compatible /v1 |
| Billing | Pay as you go |
| Use case | model API |
| Model ID | gemini-3.5-flash |
| Display name | Gemini 3.5 Flash |
| Context | 1M |
| APIsRouter price | $1.2 input / $7.2 output per 1M tokens |
When to use this model
Gemini 3.5 Flash can be called through the same OpenAI-compatible APIsRouter key used for other text and image models. Keep the Base URL fixed and switch only the model field when testing alternatives.
- Useful for agent tools, coding workflows, internal applications, and API experiments.
- Request logs show token usage, cost, latency, and sanitized errors.
- Use the model catalog and pricing page as the source of truth for availability and billing.
OpenAI SDK example
Fill Base URL at /v1 and put the model ID in the model field.
from openai import OpenAI
client = OpenAI(
api_key="sk-...",
base_url="https://api.apisrouter.com/v1",
)
response = client.chat.completions.create(
model="gemini-3.5-flash",
messages=[{"role": "user", "content": "Reply with one sentence if the connection works."}],
)
print(response.choices[0].message.content)FAQ
What is the model ID for Gemini 3.5 Flash?
Use gemini-3.5-flash. Model IDs are case-sensitive, so copying from the model catalog is safest.
How is Gemini 3.5 Flash billed?
Billing follows the live pricing page and request logs. Token models are charged by input/output/cache usage; image models are charged per request.
Do I need a separate API key for Gemini 3.5 Flash?
No. One APIsRouter key can call available text and image models unless you explicitly restrict that key.