Gemini 3.5 Flash vs Qwen3.8 Max
Pricing, context window and real answers (August 2026)
Gemini 3.5 Flash (Google) and Qwen3.8 Max (Qwen), compared as you can actually call them on FastMetal. Both are served from the same OpenAI-compatible endpoint and API key; switching is a change to the model string.
Specs and pricing
 Gemini 3.5 Flash |  Qwen3.8 Max | |
|---|---|---|
| Provider | Qwen | |
| Input (per 1M tokens) | ¥268.05 | ¥357.4 |
| Output (per 1M tokens) | ¥1,608.3 | ¥1,072.2 |
| Typical cost (1,000 in + 500 out tokens × 1,000 calls) | ¥1,072 | ¥894 |
| Context window | 1,048,576 tokens | 1,000,000 tokens |
| Release date | 5/19/2026 | 8/3/2026 |
| Input modalities | text, image, video, file, audio | text, image |
| Arena · overall | #18 · ELO 1,476 | Unranked |
| Arena · Japanese | #20 · ELO 1,456 | Unranked |
| Arena · coding | #45 · ELO 1,507 | Unranked |
Prices are FastMetal's yen rates before tax. Arena ranks are as of the latest leaderboard scrape.
Which should you pick?
- On price, Qwen3.8 Max: ¥1,072.2 per 1M output tokens, 33% less than Gemini 3.5 Flash.
- For long documents, Gemini 3.5 Flash: a 1,048,576-token context window against 1,000,000 for Qwen3.8 Max.
- If in doubt, try both on the same key. Switching is a change to the model string, and each is billed at its own rate.
Real answers to the same prompts
Exactly what the FastMetal gateway returned, side by side. Not benchmark scores: actual output.
Count the number of 'r's in 'strawberry'
Count the number of 'r's in 'strawberry'. Explain your reasoning step by step.
Gemini 3.5 Flash
There are **3** 'r's in the word "strawberry".
Here is the step-by-step breakdown of how to count them:
1. **Break the word down into its individual letters:**
* 1st letter: **s**
* 2nd letter: **t**
* 3rd letter: **r** (First 'r')
* 4th letter: **a**
* 5th letter: **w**
* 6th letter: **b**
* 7th letter: **e**
* 8th letter: **r** (Second 'r')
* 9th letter: **r** (Third 'r')
* 10th letter: **y**
2. **Identify and count only the 'r's:**
* s - t - **r** (1) - a - w - b - e - **r** (2) - **r** (3) - y
By counting them as we go through the word, we find a total of **3** 'r's.
4.8s601 output tokens
Qwen3.8 Max
The word **strawberry** is spelled:
**s t r a w b e r r y**
Now count the letter **r**:
1. s
2. t
3. **r** ← first r
4. a
5. w
6. b
7. e
8. **r** ← second r
9. **r** ← third r
10. y
There are **3** letters **r** in **strawberry**.
3.5s156 output tokens
Debug This Error
I'm getting the following error in my Node.js application: TypeError: Cannot read properties of undefined (reading 'map') at UserList (/app/components/UserList.js:12:25) at renderWithHooks (/app/node_modules/rea…
Gemini 3.5 Flash
### What is causing this error?
The error `TypeError: Cannot read properties of undefined (reading 'map')` means that your `UserList` component is trying to call `.map()` on the `users` variable, but **`users` is currently `undefined`**.
This usually happens for one of two reasons:
1. **The parent component forgot to pass the prop:** `<UserList />` was rendered without the `users` attribute.
2. **Asynchronous data fetching:** The parent component fetches the users from an API, but the API request hasn't finished yet when the component first renders, so `users` starts as `undefined`.
---
### How to fix it
Here are the three best ways to fix this, depending on how you want your UI to beh…
11.2s1524 output tokens
Qwen3.8 Max
The error means `users` is `undefined` when `UserList` tries to render:
```js
{users.map(user => ...)}
```
JavaScript cannot call `.map()` on `undefined`, so React throws:
```text
Cannot read properties of undefined (reading 'map')
```
## Most likely cause
The parent component is rendering `UserList` without passing a valid `users` array, or it is passing `users` before the data has loaded.
For example:
```jsx
<UserList />
```
or:
```jsx
<UserList users={undefined} />
```
or:
```jsx
const [users, setUsers] = useState(); // undefined initially
```
Then later:
```jsx
<UserList users={users} />
```
On the first render, `users` is still `undefined`.
---
## Fix 1: Give `users` a d…
17.7s1020 output tokens
Professional Email
Write a professional email to a client explaining that the project delivery will be delayed by two weeks due to unexpected technical challenges discovered during integration testing. The tone should be apologetic but con…
Gemini 3.5 Flash
Subject: Project Update: Revised Delivery Timeline for [Project Name]
Dear [Client Name],
I hope this email finds you well.
I am writing to provide an important update regarding the delivery schedule for [Project Name]. During our integration testing phase this week, our team encountered unexpected technical challenges related to [briefly insert area, e.g., data synchronization / API compatibility].
To ensure we deliver the secure, high-performing, and seamless product you expect, we need to adjust our final delivery date by two weeks. Our new target delivery date is now **[New Delivery Date, e.g., Friday, November 17th]**.
I want to sincerely apologize for this delay and any disrupt…
10.1s1342 output tokens
Qwen3.8 Max
Subject: Revised Project Delivery Timeline – Updated Schedule and Next Steps
Dear [Client Name],
I hope this message finds you well.
I am writing to provide an update on the current status of the project and to inform you that, during our recent integration testing phase, we encountered several unexpected technical challenges that will impact the original delivery timeline. After careful review with the technical team, we now anticipate the revised delivery date will be [insert date – two weeks from original delivery date].
Please accept my sincere apologies for this delay. We understand the importance of this project and the expectations tied to the original schedule. While this situati…
11.9s547 output tokens
Frequently asked questions
- Which is cheaper, Gemini 3.5 Flash or Qwen3.8 Max?
- Per 1M output tokens, Gemini 3.5 Flash is ¥1,608.3 and Qwen3.8 Max is ¥1,072.2 on FastMetal (yen, before tax), so Qwen3.8 Max is cheaper.
- How do the context windows of Gemini 3.5 Flash and Qwen3.8 Max compare?
- Gemini 3.5 Flash takes 1,048,576 tokens; Qwen3.8 Max takes 1,000,000.
- Can I use Gemini 3.5 Flash and Qwen3.8 Max with the same API key?
- Yes. On FastMetal's OpenAI-compatible endpoint, switch by passing "gemini-3.5-flash" or "qwen3.8-max" as the model. Each is billed at its own rate from the same prepaid balance.
Try both on one API key
Create an account and add credit to call Gemini 3.5 Flash and Qwen3.8 Max from the browser chat and the API. No monthly fee.