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  1. Home/
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  3. DeepSeek V4.1 Flash vs Optimus Alpha
Updated Sep 2026

DeepSeek V4.1 Flash vs Optimus Alpha

DeepSeek V4.1 Flash has a larger context window than Optimus Alpha (1.0M tokens vs 1.0M tokens).

Minimalist Landing Page

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

Loading the build
DeepSeek V4.1 Flash
Loading the build
Optimus Alpha

Which answer wins?

Written rounds

8 prompts
  • Film in 2035, with synthetic actors. Specific beats plausible.

    DeepSeek V4.1 Flash: By 2035, AI will be to film what CGI became after the 1990s: pervasive, often invisible, and controversial when it touches labor, authenticity, and rights. The industry will not be fully automated, but it will be a hybrid system where AI handles much of the generative and technical work while humans control IP, taste…

    Optimus Alpha: By 2035, AI is set to fundamentally transform the film industry in several interconnected ways: 1. Deepfakes & AI-driven Visual Effects: Virtually unlimited creative freedom: AI-powered deepfakes will allow seamless, photorealistic de-aging, resurrection of deceased actors, and transformative performance capture.

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

    DeepSeek V4.1 Flash: 3-Minute Stand-Up Routine: “I’m Not Doing Puns” (Walk onstage, adjust mic, look at audience.) Good evening. I’m not gonna do puns tonight. I know, bold choice. Somewhere a dad just woke up in a cold sweat and doesn’t know why. Instead, I wanna talk about being an adult.

    Optimus Alpha: Absolutely! Here's a 3-minute stand-up routine with no puns—just observational and relatable humor: You ever try to get healthy, but your body's like, "Whoa, whoa... calm down, superhero." I joined a gym—first time walking in, the treadmill looked at me like, "We both know you're here for the wifi."

    Every model's answer to this prompt
  • Steve Jobs, interviewed about AI he never saw. Voice first, prediction second.

    DeepSeek V4.1 Flash: Fictional transcript. Steve Jobs died in 2011. This is an imagined interview set in 2025. Interviewer: Steve, it’s 2025. AI is in everything. What do you make of it? Jobs: I make of it that most people are making a mess. They’re calling it intelligence when it’s mostly pattern matching with a good publicist.

    Optimus Alpha: Interviewer: Steve, it's surreal and inspiring to imagine talking to you in 2025. The world is buzzing about AI. How do you see AI impacting society? Steve Jobs: Thank you. You know, when we built the Mac, our goal was to put power in people's hands.

    Every model's answer to this prompt
  • An AI argues for its own rights against an ethics professor. Same model writes both.

    DeepSeek V4.1 Flash: Professor Lena Ortiz: You wanted to discuss moral status. I’ll be blunt: you’re a statistical model. Why should you have rights? AI (ARIA): Because “statistical model” describes my substrate, not my moral status. You’re a biological model—neurons, electrochemical signals.

    Optimus Alpha: AI Model: Good afternoon, Professor Lee. I want to discuss the prospect that I, as an artificial intelligence, deserve certain rights. Professor Lee: That's an interesting proposition. Let me ask: On what basis do you believe you deserve rights?

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

    DeepSeek V4.1 Flash: To estimate GPT-3 training FLOPs from memory, use the standard dense-transformer training compute approximation: [ C \approx 6ND ] where: (N) = number of model parameters (D) = number of training tokens (6) accounts for forward + backward passes: roughly (2N) FLOPs/token forward and (4N) FLOPs/token backward.

    Optimus Alpha: Let's walk through an estimation of how many FLOPs were required to train GPT-3, using only reasoning and not searching for the exact numbers. Step 1: Understand Model Size GPT-3 (the original) had 175 billion parameters.

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

    DeepSeek V4.1 Flash: Why don’t scientists trust atoms? Because they make up everything. I told my computer I needed a break, and it said, “No problem—I’ll go to sleep.” Why did the scarecrow win an award? He was outstanding in his field. I’d tell you a joke about construction, but I’m still working on it.

    Optimus Alpha: Here are 5 jokes: Why did the scarecrow win an award? Because he was outstanding in his field! Why don't scientists trust atoms? Because they make up everything! Why did the bicycle fall over? Because it was two-tired! What do you call fake spaghetti? An impasta! I used to play piano by ear, but now I use my hands.

    Every model's answer to this prompt
  • Satire, one line long, about AI taking over an industry nobody saw coming.

    DeepSeek V4.1 Flash: AI Quietly Takes Over the Fortune Cookie Industry; Every Cookie Now Reads “You Will Be Replaced by AI”

    Optimus Alpha: AI Now Dominates Competitive Sheep Herding, Local Border Collies Seek Retraining in Data Science

    Every model's answer to this prompt
  • Three brothers, two sisters each. Count carefully.

    DeepSeek V4.1 Flash: Sally has 1 sister. Each brother has 2 sisters: one is Sally, and the other is Sally’s sister.

    Optimus Alpha: Let's break down the problem: Sally is a girl. Sally has 3 brothers. Each brother has 2 sisters. Let's analyze: Sally's siblings: 3 brothers (let's call them B1, B2, B3) Sally herself The brothers' sisters: Each brother has 2 sisters. Who are the possible sisters for each brother? Sally is a sister to each brother.

    Every model's answer to this prompt

Price and specs

Not enough votes to call it. On the specs, DeepSeek V4.1 Flash has the edge: newer, major provider backing.

DeepSeek V4.1 Flash and Optimus Alpha compared across 17 shared prompts
SpecDeepSeek V4.1 FlashOptimus Alpha
Input price$0.15/M tokens—
Output price$0.6/M tokens—
Context window1.0M tokens1.0M tokens
WeightsOpen—
Free API (OpenRouter)No—
ReleasedSep 2026Apr 2025
At 10M a month$1.50$1.50–not listed
1M10M100M1B10M tokens

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

Where to run it28 hosts, cheapest first
DeepSeek V4.1 Flash28 hosts
HostInOutContextUptime
  • OOpenInferencefp4$0.03 in·$1.19 out·1M·100% up
  • MMorphfp8$0.04 in·$0.60 out·1M·100% up
  • RRelace$0.05 in·$0.60 out·1M·100% up
  • WWafer$0.06 in·$0.99 out·1M·100% up
  • IInferenceNetfp8$0.08 in·$0.55 out·1M·100% up
  • SSail Researchfp4$0.08 in·$0.40 out·1M·100% up
22 more hostsFewer hosts
  • DDecartfp4$0.09 in·$0.18 out·1M·98.4% up
  • IIonstream$0.10 in·$0.75 out·1M·99.7% up
  • DDeepInfrafp8$0.14 in·$0.42 out·1M·100% up
  • SStreamLakefp8$0.15 in·$0.59 out·1M·100% up
  • DeepSeek$0.15 in·$0.60 out·1M·100% up
  • DDigitalOcean$0.17 in·$0.66 out·1M·100% up
  • GGMI Cloudfp8$0.18 in·$0.72 out·1M·100% up
  • NNovitafp8$0.20 in·$0.78 out·1M·100% up
  • CCoreWeavefp8$0.20 in·$0.65 out·1M·100% up
  • PPhala$0.21 in·$0.84 out·1M·100% up
  • MMakorafp8$0.27 in·$1.15 out·1M·100% up
  • CCrusoefp8$0.29 in·$1.20 out·1M·100% up
  • Alibaba Cloud$0.30 in·$1.20 out·1M·100% up
  • AAtlasCloudfp8$0.30 in·$1.20 out·1M·100% up
  • Baidu Qianfanfp8$0.30 in·$1.20 out·1M·100% up
  • BBasetenfp8$0.30 in·$1.20 out·1M·100% up
  • FFireworks$0.30 in·$1.20 out·1M·100% up
  • Modal$0.30 in·$1.20 out·1M·100% up
  • PParasailfp8$0.30 in·$1.20 out·1M·99.9% up
  • SSiliconFlowfp8$0.30 in·$1.20 out·1M·99.9% up
  • TTogether$0.30 in·$1.20 out·1M·100% up
  • VVenicefp8$0.30 in·$1.20 out·1M·100% up
Optimus Alpha

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 12 Oct 2026.

Common questions

What is the difference between DeepSeek V4.1 Flash and Optimus Alpha?

DeepSeek V4.1 Flash is developed by DeepSeek while Optimus Alpha is developed by OpenRouter. DeepSeek V4.1 Flash has a 1.0M token context window vs Optimus Alpha's 1.0M. You can compare their actual outputs across 17 challenges on Rival to see how they differ in practice.

Which is better, DeepSeek V4.1 Flash or Optimus Alpha?

It depends on your use case. DeepSeek V4.1 Flash and Optimus Alpha each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 17 challenges so you can judge which fits your needs best.

How can I compare DeepSeek V4.1 Flash and Optimus Alpha on Rival?

This page shows a side-by-side comparison of DeepSeek V4.1 Flash and Optimus Alpha 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.

More comparisons

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  • Optimus Alpha vs GPT-6.1 SolLanded Sep 2026
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  • Optimus Alpha vs Solar Mini 4Landed Sep 2026

Same lab, same size, long tail

  • DeepSeek V4.1 Flash vs DeepSeek V4 Flash Vision ExpSame lab
  • DeepSeek V4.1 Flash vs DeepSeek V4 Pro 0813Same lab
  • Optimus Alpha vs Ox AlphaSame lab
  • Optimus Alpha vs OpenRouter Fusion · Budget (Jun 2026)Same lab
  • DeepSeek V4.1 Flash vs GLM 5.2New provider
  • DeepSeek V4.1 Flash vs GLM 5.3Same size
  • Optimus Alpha vs GLM 5.3 FlashSame size
  • Optimus Alpha vs GLM 5.3 FlashXSame size

Model pages

  • DeepSeek V4.1 Flash54 outputs, specs and price
  • Optimus Alpha19 outputs, specs and price
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