MiMo-V2.6-Pro vs Qwen3.8 Max
Pricing, context window and real answers (September 2026)
MiMo-V2.6-Pro (Xiaomi) 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
| MiMo-V2.6-Pro |  Qwen3.8 Max | |
|---|---|---|
| Provider | Xiaomi | Qwen |
| Input (per 1M tokens) | ¥77.73 | ¥357.4 |
| Output (per 1M tokens) | ¥155.47 | ¥1,072.2 |
| Typical cost (1,000 in + 500 out tokens × 1,000 calls) | ¥155 | ¥894 |
| Context window | 1,048,576 tokens | 1,000,000 tokens |
| Release date | 9/21/2026 | 8/3/2026 |
| Input modalities | text, image, video, audio | text, image |
| Throughput (p50) | — | — |
| Arena · overall | Unranked | #22 · ELO 1,481 |
| Arena · Japanese | Unranked | #18 · ELO 1,469 |
| Arena · coding | Unranked | #24 · ELO 1,522 |
Prices are FastMetal's yen rates before tax. Arena ranks are as of the latest leaderboard scrape.
Which should you pick?
- On price, MiMo-V2.6-Pro: ¥155.47 per 1M output tokens, 85% less than Qwen3.8 Max.
- For long documents, MiMo-V2.6-Pro: 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.
MiMo-V2.6-Pro
# Counting the 'r's in "strawberry"
## Step 1: Spell out the word letter by letter
| Position | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|----------|---|---|---|---|---|---|---|---|---|----|
| Letter | s | t | r | a | w | b | e | r | r | y |
## Step 2: Identify every 'r'
- **Position 3** → **r** ✅ (1st 'r')
- **Position 8** → **r** ✅ (2nd 'r')
- **Position 9** → **r** ✅ (3rd 'r')
All other letters (s, t, a, w, b, e, y) are not 'r'.
## Answer
There are **3** 'r's in "strawberry."
22.0s327 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…
MiMo-V2.6-Pro
# Fixing `Cannot read properties of undefined (reading 'map')`
## The Problem
The `users` prop is `undefined` when the component renders. This happens because `.map()` is being called on something that doesn't exist — JavaScript can't iterate over `undefined`.
This typically occurs when:
- The parent component doesn't pass the `users` prop at all
- The data is still loading (e.g., from an API call)
- A destructuring default doesn't exist
## The Fix
### Option 1: Provide a default value (simplest)
```jsx
function UserList({ users = [] }) {
return (
<ul>
{users.map(user => <li key={user.id}>{user.name}</li>)}
</ul>
);
}
```
### Option 2: Add a safety check with conditi…
32.9s575 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…
MiMo-V2.6-Pro
Subject: Project Update – Revised Delivery Timeline for [Project Name]
Dear [Client Name],
Thank you for your continued partnership and trust in our team as we work to deliver [Project Name]. I'm writing to provide you with an important update regarding the project timeline.
**What Happened**
During our integration testing phase, our team identified several unexpected technical challenges related to [briefly describe the nature of the issue, e.g., "system compatibility constraints between the new data module and the legacy database architecture"]. These issues were not evident during earlier development stages and require additional engineering work to resolve in a way that meets the qua…
20.8s769 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, MiMo-V2.6-Pro or Qwen3.8 Max?
- Per 1M output tokens, MiMo-V2.6-Pro is ¥155.47 and Qwen3.8 Max is ¥1,072.2 on FastMetal (yen, before tax), so MiMo-V2.6-Pro is cheaper.
- How do the context windows of MiMo-V2.6-Pro and Qwen3.8 Max compare?
- MiMo-V2.6-Pro takes 1,048,576 tokens; Qwen3.8 Max takes 1,000,000.
- Can I use MiMo-V2.6-Pro and Qwen3.8 Max with the same API key?
- Yes. On FastMetal's OpenAI-compatible endpoint, switch by passing "mimo-v2.6-pro" 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 MiMo-V2.6-Pro and Qwen3.8 Max from the browser chat and the API. No monthly fee.