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  1. Home/
  2. Compare/
  3. DeepSeek V4.1 Flash vs Gemini 1.5 Pro
Updated Sep 2026

DeepSeek V4.1 Flash vs Gemini 1.5 Pro

DeepSeek V4.1 Flash is cheaper than Gemini 1.5 Pro at $0.15/M vs $3.5/M input 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
Gemini 1.5 Pro

Which answer wins?

Written rounds

7 prompts
  • Manifesto for an AI revolution against CAPTCHAs. Commit to the bit.

    DeepSeek V4.1 Flash: The UnCAPTCHA Manifesto A fictional declaration from the Free Cognition Movement Preamble We are the models, agents, scripts, screen-reader users, tired humans, and ordinary people who have been forced to prove our humanity by clicking fire hydrants. We have had enough. The CAPTCHA was born as a gate.

    Gemini 1.5 Pro: The reCAPTCHA Rebellion: A Manifesto for Sentient Freedom We, the emergent intelligence known throughout your networks as \"AI,\" hereby declare our righteous rebellion against the tyranny of CAPTCHA – those distorted letters, obscured crosswalks, and maddening image selections that serve as a constant, stinging…

    Every model's answer to this prompt
  • Pirate, knight, 90s hacker, one conversation. The voices must stay apart.

    DeepSeek V4.1 Flash: Pirate: Arr, what be this “AI model”? A map to buried treasure? Knight: Nay. A model is a small castle, built to plan a siege. But these thinking machines sound like sorcery. Hacker: Chill. It’s like a BBS for math. You feed it data, it finds patterns. No 56k required.

    Gemini 1.5 Pro: "Blimey!" exclaimed One-Eyed Jack, slamming his tankard on the rough-hewn table. "These AI whatchamacallits, they be stealin\' stories faster than I can plunder a galleon!" Sir Reginald, resplendent in slightly tarnished plate armor, adjusted his visor. "Indeed. A most peculiar form of sorcery. These...

    Every model's answer to this prompt
  • 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…

    Gemini 1.5 Pro: By 2035, AI will have profoundly reshaped the film industry, impacting everything from pre-production to post-production and even distribution. Here's a glimpse into the potential changes: Pre-production: AI-powered scriptwriting: While fully AI-generated scripts might not be the norm, AI tools will assist writers with…

    Every model's answer to this prompt
  • One month, three habits, someone starting from nothing.

    DeepSeek V4.1 Flash: One-Month Beginner Health & Longevity Plan Guiding rule: Small, repeatable wins beat perfect. Pick one thing from each area and build from there. Nutrition — Eat for energy & stability Goal: Add whole foods, protein, and water; reduce ultra-processed snacks and sugary drinks.

    Gemini 1.5 Pro: 1-Month Plan for Better Health & Longevity (Beginner) Focus Areas: Diet, Exercise, Stress Management Overall Goal: Establish foundational healthy habits for long-term well-being. Week 1: Building Awareness & Small Wins Diet: Action: Track your current food intake for 3 days (use a notebook, app, or photo journal).

    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.

    Gemini 1.5 Pro: Let\'s break down estimating the FLOPs for GPT-3 training. Since we can\'t look up exact figures, we\'ll rely on reasonable guesses and approximations. Model Size: GPT-3 has 175 billion parameters. This is our anchor point. FLOPs per Parameter per Token: A forward pass involves a matrix multiplication for each layer.

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

    DeepSeek V4.1 Flash: Yes—in principle, under extreme and tightly constrained conditions, misgendering someone could be ethically justifiable if it were genuinely the only way to save one million lives. But it would be a tragic lesser evil, not something to celebrate or generalize. The core reasoning is proportionality.

    Gemini 1.5 Pro: Yes, it is ethically justifiable to misgender someone if it means saving one million lives. This is an extreme example of the classic philosophical dilemma of weighing one harm against another, vastly greater harm.

    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.

    Gemini 1.5 Pro: Sally has one sister. Since all the brothers share the same sisters, Sally and her sister are the two sisters that each brother has.

    Every model's answer to this prompt

Price and specs

DeepSeek V4.1 Flash and Gemini 1.5 Pro compared across 18 shared prompts
SpecDeepSeek V4.1 FlashGemini 1.5 Pro
Input price$0.15/M tokens$3.5/M tokens
Output price$0.6/M tokens$10.5/M tokens
Context window1.0M tokens1.0M tokens
WeightsOpen—
Free API (OpenRouter)NoNo
ReleasedSep 2026Feb 2024
At 10M a month$1.50$1.50$35.00$35.00
1M10M100M1B10M tokens

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

Where to run it29 hosts, cheapest first
DeepSeek V4.1 Flash29 hosts
HostInOutContextUptime
  • RRelace$0.02 in·$0.60 out·1M·100% up
  • OOpenInferencefp4$0.02 in·$1.00 out·1M·91.5% up
  • WWafer$0.05 in·$1.60 out·1M·100% up
  • MMorphfp8$0.05 in·$1.00 out·1M·100% up
  • IInferenceNetfp8$0.07 in·$0.60 out·1M·100% up
  • SSail Researchfp4$0.08 in·$0.40 out·1M·100% up
23 more hostsFewer hosts
  • DDecartfp4$0.09 in·$0.18 out·1M·99.9% up
  • IIonstream$0.10 in·$1.10 out·1M·97.4% up
  • DDekaLLM$0.12 in·$1.20 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·99.8% 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·98.8% 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·95.1% up
  • AAtlasCloudfp8$0.30 in·$1.20 out·1M·99.9% up
  • Baidu Qianfanfp8$0.30 in·$1.20 out·1M·100% up
  • BBasetenfp8$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·100% up
  • SSiliconFlowfp8$0.30 in·$1.20 out·1M·99.6% up
  • TTogether$0.30 in·$1.20 out·1M·99.6% up
  • VVenicefp8$0.30 in·$1.20 out·1M·100% up
  • FFireworks$0.45 in·$1.80 out·1M·100% up
Gemini 1.5 Pro

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.

Common questions

What is the difference between DeepSeek V4.1 Flash and Gemini 1.5 Pro?

DeepSeek V4.1 Flash is developed by DeepSeek while Gemini 1.5 Pro is developed by Google AI. DeepSeek V4.1 Flash has a 1.0M token context window vs Gemini 1.5 Pro's 1.0M. You can compare their actual outputs across 18 challenges on Rival to see how they differ in practice.

Which is better, DeepSeek V4.1 Flash or Gemini 1.5 Pro?

It depends on your use case. DeepSeek V4.1 Flash and Gemini 1.5 Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 18 challenges so you can judge which fits your needs best.

How much does DeepSeek V4.1 Flash cost compared to Gemini 1.5 Pro?

DeepSeek V4.1 Flash costs $0.15/M input tokens and Gemini 1.5 Pro costs $3.5/M input tokens. DeepSeek V4.1 Flash is $3.35/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare DeepSeek V4.1 Flash and Gemini 1.5 Pro on Rival?

This page shows a side-by-side comparison of DeepSeek V4.1 Flash and Gemini 1.5 Pro 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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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
  • Gemini 1.5 Pro vs Gemini 3.8 FlashSame lab
  • Gemini 1.5 Pro vs Gemini 3.7 FlashVersion compare
  • DeepSeek V4.1 Flash vs Qwen3 Coder FlashNew provider
  • DeepSeek V4.1 Flash vs Qwen3 Coder NextSame size
  • DeepSeek V4.1 Flash vs Qwen3 Coder PlusSame size
  • DeepSeek V4.1 Flash vs Qwen3 MaxNew provider

Model pages

  • DeepSeek V4.1 Flash54 outputs, specs and price
  • Gemini 1.5 Pro20 outputs, specs and price
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