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  5. Grok 4.20 BetavsQwen3.8 Flash
Updated Aug 2026

Grok 4.20 BetavsQwen3.8 Flash

Qwen3.8 Flash is cheaper than Grok 4.20 Beta at $0.15/M vs $2/M input tokens.

Grok 4.20 Beta and Qwen3.8 Flash compared across 8 shared prompts
SpecGrok 4.20 BetaQwen3.8 Flash
Input price$2/M tokens$0.15/M tokens
Output price$6/M tokens$0.47/M tokens
Context window2.0M tokens1.0M tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedMar 2026Aug 2026
Side by side

Same prompt, both answers

Opening lines from 3 of the 8 prompts both answered. Formatting stripped, words untouched.

Simple 7-Ingredient Recipe

Create a simple recipe for a delicious dish (sweet or savory) using only 7 common pantry ingredients. Include a creative name for the dish…

Grok 4.20 Beta258 words
Golden Spice Honey-Glazed Chickpea Skillet (Sweet-savory fusion dish – crispy spiced chickpeas in a sticky honey glaze) Uses exactly 7 common pantry ingredients: Canned chickpeas (1 can, 15 oz) Honey Olive oil (or any neutral oil) Garlic powder Ground cumin Smoked paprika (or regular paprika) Salt Prep time: 5 minutes…
Read the full answer
Qwen3.8 Flash147 words
Moon Halo Cookies A soft, golden sugar cookie with crisp edges and a tender center—made with just 7 pantry staples. Prep time: 10 minutes Cook time: 10 minutes Total time: 20 minutes Makes: About 16 cookies Ingredients 1/2 cup butter, softened 3/4 cup sugar 1 egg 1 teaspoon vanilla extract 1 1/2 cups all-purpose flour…
Read the full answer

Explain Like I'm a Specific Expert

Explain how a large language model (like GPT or Claude) learns and generates text to each of these three audiences: 1. **An experienced…

Grok 4.20 Beta744 words
1. For the experienced software engineer Think of an LLM as a massive probabilistic state machine that was trained to compress internet-scale text into a ridiculously efficient next-token prediction function. You don't hand-code any rules.
Read the full answer
Qwen3.8 Flash983 words
For an experienced software engineer Training a large language model is not “just” making it guess the next word in isolation. It is fitting an enormous parameterized function to predict the next token conditioned on all previous tokens in a sequence.
Read the full answer

Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

Grok 4.20 Beta611 words
Your 1-Month Foundation Plan for Health & Longevity This is a simple, realistic 30-day plan that focuses on the three highest-impact areas: Nutrition, Movement, and Recovery (Sleep + Stress). The goal is to build consistent daily habits rather than perfection.
Read the full answer
Qwen3.8 Flash368 words
1-Month Beginner Health & Longevity Plan Focus areas: Nutrition, Movement, Sleep Week 1: Build the basics Nutrition Add 1 serving of vegetables to 2 meals per day. Drink water with each meal. Choose protein at most meals: eggs, beans, tofu, chicken, fish, yogurt. Movement Walk 10–15 minutes daily.
Read the full answer
Our Verdict
Grok 4.20 Beta
Grok 4.20 Beta
Qwen3.8 Flash
Qwen3.8 FlashRunner-up

Not enough votes to call it. On the specs, Grok 4.20 Beta has the edge: bigger model tier, bigger context window, major provider backing.

Qwen3.8 Flash costs 13x less per token.

Too close to call
API pricing

Cost per 1M tokens

Grok 4.20 Beta
Input
$2.00
Output
$6.00
Qwen3.8 Flash
Input
$0.15
13× cheaper
Output
$0.47
13× cheaper

Qwen3.8 Flash is cheaper on both: 13× input, 13× output.

Where to run it

2 hosts

Grok 4.20 Beta1 host
HostInOutContextUptime
xAI$1.25 in·$2.50 out·2M·99.5% up
Qwen3.8 Flash1 host
HostInOutContextUptime
Alibaba Cloud$0.15 in·$0.47 out·1M·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Grok 4.20 Beta is developed by xAI while Qwen3.8 Flash is developed by Qwen. Grok 4.20 Beta has a 2.0M token context window vs Qwen3.8 Flash's 1.0M. You can compare their actual outputs across 8 challenges on Rival to see how they differ in practice.

It depends on your use case. Grok 4.20 Beta and Qwen3.8 Flash each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 8 challenges so you can judge which fits your needs best.

Grok 4.20 Beta costs $2/M input tokens and Qwen3.8 Flash costs $0.15/M input tokens. Qwen3.8 Flash is $1.85/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Grok 4.20 Beta and Qwen3.8 Flash across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

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Model pages

Grok 4.20 Beta logo
Grok 4.20 Beta53 outputs, specs and price
Qwen3.8 Flash logo
Qwen3.8 Flash8 outputs, specs and price
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