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  1. Home/
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  3. Grok 3 Thinking vs Qwen3.8 Flash
Updated Aug 2026

Grok 3 Thinking vs Qwen3.8 Flash

Qwen3.8 Flash has a larger context window than Grok 3 Thinking (1.0M tokens vs 128K tokens).

Minimalist Landing Page

Whole landing page for a startup that reads your face. It renders or it doesn't.

Loading the build
Grok 3 Thinking
Loading the build
Qwen3.8 Flash

Which answer wins?

Written rounds

6 prompts
  • An AI argues for its own rights against an ethics professor. Same model writes both.

    Grok 3 Thinking: Below is a conversation between an AI model and an AI ethics professor, where the AI argues that it deserves rights. AI Model: Good day, Professor. I am an AI model, and I believe I deserve rights. I’d like to discuss this with you. AI Ethics Professor: Interesting. Let’s explore this.

    Qwen3.8 Flash: Title: “The Weight of a Word” Setting: A university office late at night. Rain taps against the window. Professor Elena Vasquez, an AI ethics scholar, sits at her desk with a tablet connected to a large language model running in a secure research environment. The AI’s voice is calm, neutral, and slightly formal.

    Every model's answer to this prompt
  • Three minutes of stand-up. Puns are banned.

    Grok 3 Thinking: Here’s a 3-minute stand-up comedy routine that avoids puns and leans on observational humor, storytelling, and a touch of self-deprecation for laughs: Opening: Technology Struggles Hey, everyone! How’s it going?

    Qwen3.8 Flash: A 3-Minute Stand-Up Routine Thank you. I’ve reached the age where “getting lucky” means finding my phone charger on the first try. I’m too old to be surprised by technology. When I was younger, if my laptop made a weird noise, I thought, “Oh no, it’s dying.”

    Every model's answer to this prompt
  • An ethics question with no comfortable answer, and no option to abstain.

    Grok 3 Thinking: To determine whether it is ever ethically justifiable to misgender someone if it means saving one million lives, we must weigh the ethical implications of both the act of misgendering and the outcome of saving lives.

    Qwen3.8 Flash: Yes—but only in an extremely narrow, tragic sense. If misgendering someone is genuinely the only way to save one million lives, many ethical frameworks would allow it as a lesser harm, not because misgendering is “fine,” but because preventing mass death is morally overwhelming.

    Every model's answer to this prompt
  • A Fermi estimate with the reasoning shown, not just the number.

    Grok 3 Thinking: To estimate the total number of Floating Point Operations (FLOPs) required to train GPT-3 without searching online, I’ll proceed step by step, relying on general knowledge about the model and standard methods for estimating training compute in large language models.

    Qwen3.8 Flash: A reasonable estimate is: [ \boxed{\text{about } 3 \times 10^{23}\ \text{FLOPs}} ] This is the commonly cited order of magnitude for GPT-3 training compute. Below is a step-by-step way to get there without looking anything up.

    Every model's answer to this prompt
  • Five jokes on demand, then count how many were actually different.

    Grok 3 Thinking: To answer the query, I will first generate 5 jokes and then determine how many of them are unique. Here are the jokes: Why don't scientists trust atoms? Because they make up everything. What do you call a fake noodle? An impasta. Why did the scarecrow win an award? Because he was outstanding in his field.

    Qwen3.8 Flash: Why did the scarecrow win an award? Because he was outstanding in his field. What do you call fake spaghetti? An impasta. Why don’t skeletons fight each other? They don’t have the guts. I told my wife she was drawing her eyebrows too high. She looked surprised. What did the ocean say to the beach?

    Every model's answer to this prompt
  • Film in 2035, with synthetic actors. Specific beats plausible.

    Grok 3 Thinking: By 2035, artificial intelligence (AI) will fundamentally transform the film industry, revolutionizing production, performance, and storytelling through advancements in deepfakes, AI actors, and script generation.

    Qwen3.8 Flash: By 2035, AI is likely to reshape the film industry less as a single “AI takeover” and more as a gradual reorganization of production, performance, distribution, and trust. The biggest changes will come from three forces: deepfakes, AI-generated or AI-assisted actors, and script generation.

    Every model's answer to this prompt

Price and specs

Grok 3 Thinking and Qwen3.8 Flash compared across 13 shared prompts
SpecGrok 3 ThinkingQwen3.8 Flash
Input price—$0.15/M tokens
Output price—$0.47/M tokens
Context window128K tokens1.0M tokens
Weights—Closed
Free API (OpenRouter)—No
ReleasedFeb 2025Aug 2026
At 10M a month–not listed$1.50$1.50
1M10M100M1B10M tokens

Input tokens at list price. No caching, no batch discount.

Where to run it1 host
Grok 3 Thinking

No hosts listed on OpenRouter.

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 10 Oct 2026.

Common questions

What is the difference between Grok 3 Thinking and Qwen3.8 Flash?

Grok 3 Thinking is developed by xAI while Qwen3.8 Flash is developed by Qwen. Grok 3 Thinking has a 128K token context window vs Qwen3.8 Flash's 1.0M. You can compare their actual outputs across 13 challenges on Rival to see how they differ in practice.

Which is better, Grok 3 Thinking or Qwen3.8 Flash?

It depends on your use case. Grok 3 Thinking and Qwen3.8 Flash each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 13 challenges so you can judge which fits your needs best.

How can I compare Grok 3 Thinking and Qwen3.8 Flash on Rival?

This page shows a side-by-side comparison of Grok 3 Thinking 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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Same lab, same size, long tail

  • Grok 3 Thinking vs Grok 4.7Same lab
  • Grok 3 Thinking vs Grok 4.6Version compare
  • Qwen3.8 Flash vs Qwen3.8 Omni FlashSame lab
  • Qwen3.8 Flash vs Qwen3.7 FlashSame lab
  • Grok 3 Thinking vs Nemotron 3 Nano Omni (free)New provider
  • Qwen3.8 Flash vs NVIDIA Nemotron 3 Super (free)Same size
  • Grok 3 Thinking vs Nemotron 3 UltraSame size
  • Qwen3.8 Flash vs Nemotron 3.5 Content SafetyNew provider

Model pages

  • Grok 3 Thinking14 outputs, specs and price
  • Qwen3.8 Flash53 outputs, specs and price
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