Gemini 2.5 Flash Thinking
Gemini 2.5 Flash Thinking is a language model from Google. It is currently free at 1 provider with up to 1M tokens of context. The model understands images, supports step-by-step reasoning, is suited to coding, supports tool calling.
- Developer
- Context
- 1M tokens
- Type
- Text
- License
- Proprietary
- Free since
- October 6, 2026
Where to use Gemini 2.5 Flash Thinking for free
Each row is a separate free endpoint with its own limits.
Quick start
curl https://api.unorouter.com/v1/chat/completions \
-H "Authorization: Bearer $UNOROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gemini-2.5-flash-thinking:free",
"messages": [{"role": "user", "content": "Hello!"}]
}'from openai import OpenAI
client = OpenAI(
base_url="https://api.unorouter.com/v1",
api_key="YOUR_UNOROUTER_API_KEY",
)
reply = client.chat.completions.create(
model="gemini-2.5-flash-thinking:free",
messages=[{"role": "user", "content": "Hello!"}],
)
print(reply.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.unorouter.com/v1",
apiKey: process.env.UNOROUTER_API_KEY,
});
const reply = await client.chat.completions.create({
model: "gemini-2.5-flash-thinking:free",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(reply.choices[0].message.content);Example for UnoRouter. Any OpenAI-compatible client works: Cursor, Cline, OpenCode, Open WebUI.
Benchmarks
Source: Artificial Analysis · Gemini 2.5 Flash (Reasoning)
Similar free models
FAQ
Is Gemini 2.5 Flash Thinking free?
Yes. As of October 6, 2026, Gemini 2.5 Flash Thinking is free at UnoRouter. Each provider has its own limits — see the table above.
What is the context window of Gemini 2.5 Flash Thinking?
The largest context among free routes is 1,000,000 tokens. Some providers cap it lower.
How do I call Gemini 2.5 Flash Thinking via API?
Use any OpenAI-compatible client with base URL https://api.unorouter.com/v1, model ID gemini-2.5-flash-thinking:free, and a UnoRouter key.
How good is Gemini 2.5 Flash Thinking?
Artificial Analysis Intelligence Index: 13.1, GPQA Diamond: 79%. For comparison, the strongest free model in the catalog right now is GLM 5.3.
Is Gemini 2.5 Flash Thinking open-weight?
No, it is proprietary: access is only through provider APIs.