Qwen3.7 Max vs Qwen3.8 Max
Pricing, context window and real answers (August 2026)
Qwen3.7 Max (Qwen) 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
 Qwen3.7 Max | Qwen3.8 Max | |
|---|---|---|
| Provider | Qwen | Qwen |
| Input (per 1M tokens) | ¥263.58 | ¥357.4 |
| Output (per 1M tokens) | ¥790.75 | ¥1,072.2 |
| Typical cost (1,000 in + 500 out tokens × 1,000 calls) | ¥659 | ¥894 |
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Release date | 5/21/2026 | 8/3/2026 |
| Input modalities | text | text, image |
| Arena · overall | #21 · ELO 1,475 | Unranked |
| Arena · Japanese | Unranked | Unranked |
| Arena · coding | #15 · ELO 1,526 | Unranked |
Prices are FastMetal's yen rates before tax. Arena ranks are as of the latest leaderboard scrape.
Which should you pick?
- On price, Qwen3.7 Max: ¥790.75 per 1M output tokens, 26% less than 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.
Qwen3.7 Max
To count the number of 'r's in the word "strawberry", let's break the word down letter by letter from left to right:
1. **s** - not an 'r'
2. **t** - not an 'r'
3. **r** - This is the **1st** 'r'
4. **a** - not an 'r'
5. **w** - not an 'r'
6. **b** - not an 'r'
7. **e** - not an 'r'
8. **r** - This is the **2nd** 'r'
9. **r** - This is the **3rd** 'r'
10. **y** - not an 'r'
By examining each character individually, we can see that the letter 'r' appears in the 3rd, 8th, and 9th positions.
Therefore, there are **3** 'r's in "strawberry".
15.1s842 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…
Qwen3.7 Max
This error occurs because the `users` prop being passed to your `UserList` component is **`undefined`** at the time React tries to render it. JavaScript cannot call the `.map()` method on `undefined`, which throws the error.
This usually happens for one of three reasons:
1. **Asynchronous Data Fetching:** The parent component is fetching `users` from an API. On the *initial render*, the data hasn't arrived yet, so the variable is `undefined`.
2. **Missing Prop:** The parent component forgot to pass the `users` prop (e.g., `<UserList />` instead of `<UserList users={myUsers} />`).
3. **Incorrect State Initialization:** The parent component initialized its state as `undefined` or `null` inste…
34.9s1851 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…
Qwen3.7 Max
Subject: Project Update: Revised Timeline and Integration Testing Status for [Project Name]
Dear [Client Name],
I am writing to provide you with an update on the progress of [Project Name].
During our recent integration testing phase, we encountered some unexpected technical complexities regarding [briefly mention the specific area, e.g., the third-party API data sync / the legacy database migration]. While our initial unit testing was successful, integrating these specific components requires additional refinement to ensure optimal performance and system stability.
Because we are committed to delivering a product that meets our high standards for quality, we need to adjust our final d…
40.1s1800 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, Qwen3.7 Max or Qwen3.8 Max?
- Per 1M output tokens, Qwen3.7 Max is ¥790.75 and Qwen3.8 Max is ¥1,072.2 on FastMetal (yen, before tax), so Qwen3.7 Max is cheaper.
- How do the context windows of Qwen3.7 Max and Qwen3.8 Max compare?
- Qwen3.7 Max takes 1,000,000 tokens; Qwen3.8 Max takes 1,000,000.
- Can I use Qwen3.7 Max and Qwen3.8 Max with the same API key?
- Yes. On FastMetal's OpenAI-compatible endpoint, switch by passing "qwen3.7-max" 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 Qwen3.7 Max and Qwen3.8 Max from the browser chat and the API. No monthly fee.