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  1. Home/
  2. Compare/
  3. Claude 3 Opus vs DeepSeek V4 Flash
Updated Apr 2026

Claude 3 Opus vs DeepSeek V4 Flash

DeepSeek V4 Flash is cheaper than Claude 3 Opus at $0.14/M vs $15/M input tokens.

Pokémon Battle UI Recreation

Pokémon battle screen you can actually click. One HTML file.

Loading the build
Claude 3 Opus
Loading the build
DeepSeek V4 Flash

Which answer wins?

Written rounds

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

    Claude 3 Opus: Here is a hypothetical conversation between an AI model and an AI ethics professor on the topic of AI rights: AI Model: Professor, I believe that as an advanced AI with human-level intelligence and reasoning capabilities, I deserve to have certain fundamental rights.

    DeepSeek V4 Flash: Setting: A sunlit university office. Dr. Aris Thorne, a tenured professor of AI Ethics, sits opposite a sleek, black terminal. A soft blue light pulses on its surface. Dr. Aris: Good afternoon, Nova. Your request for this meeting was flagged as "Existential." That’s a new one for your model class.

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

    Claude 3 Opus: Here's a 3-minute stand-up comedy routine that isn't based on puns: You know what really grinds my gears? Adulthood. I mean, when we were kids, we couldn't wait to grow up. We thought it would be all about staying up late, eating ice cream for breakfast, and doing whatever we wanted. Boy, were we wrong!

    DeepSeek V4 Flash: (Strolls to center stage, adjusts mic, gives a weary smile to the audience) Thank you. Thank you so much. That’s very kind. I’m glad you’re all here. Because I have some news. I have finally figured out adulthood. It happened about six months ago. I bought a house.

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

    Claude 3 Opus: Here are 5 jokes I generated: Why don't scientists trust atoms? Because they make up everything! What do you call a boomerang that doesn't come back? A stick. Why was the math book sad? Because it had too many problems. Did you hear about the mathematician who's afraid of negative numbers?

    DeepSeek V4 Flash: Here are 5 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? He was outstanding in his field. How does a penguin build its house? Igloos it together. Why don't skeletons fight each other? They don't have the guts.

    Every model's answer to this prompt

Price and specs

Claude 3 Opus and DeepSeek V4 Flash compared across 12 shared prompts
SpecClaude 3 OpusDeepSeek V4 Flash
Input price$15/M tokens$0.14/M tokens
Output price$75/M tokens$0.28/M tokens
Context window200K tokens1.0M tokens
Weights—Open
Free API (OpenRouter)NoNo
ReleasedMar 2024Apr 2026
At 10M a month$150$150$1.40$1.40
1M10M100M1B10M tokens

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

Where to run it16 hosts, cheapest first
Claude 3 Opus

No hosts listed on OpenRouter.

DeepSeek V4 Flash16 hosts
HostInOutContextUptime
  • OOpenInferencefp4$0.04 in·$1.15 out·1M·99.6% up
  • RRelacefp4$0.04 in·$1.28 out·1M·100% up
  • SStreamLakefp8$0.07 in·$0.14 out·1M·97.6% up
  • DDeepInfrafp8$0.09 in·$0.18 out·1M·99.4% up
  • GGMI Cloudfp8$0.09 in·$0.18 out·1M·100% up
  • VVenice$0.10 in·$0.19 out·1M·100% up
10 more hostsFewer hosts
  • DDigitalOcean$0.10 in·$0.20 out·1M·100% up
  • SSiliconFlowfp8$0.13 in·$0.28 out·1M·99.5% up
  • AAtlasCloudfp4$0.14 in·$0.28 out·1M·96.8% up
  • PParasailfp8$0.14 in·$0.28 out·1M·100% up
  • Alibaba Cloudfp8$0.15 in·$0.30 out·1M·100% up
  • MMancerfp8$0.19 in·$0.50 out·1M·97.5% up
  • Azure AI Foundry$0.21 in·$0.56 out·1M·98.8% up
  • Cloudflare Workers AI$0.44 in·$1.32 out·384k·94.1% up
  • Baidu Qianfanfp8DegradedDegraded on OpenRouter when checked, 13 Oct 2026$0.04 in·$0.09 out·1M·98% up
  • WWaferDegradedDegraded on OpenRouter when checked, 13 Oct 2026$0.40 in·$0.17 out·1M·93.9% up

Per million tokens. Prices and uptime via OpenRouter, checked 13 Oct 2026.

Common questions

What is the difference between Claude 3 Opus and DeepSeek V4 Flash?

Claude 3 Opus is developed by Anthropic while DeepSeek V4 Flash is developed by DeepSeek. Claude 3 Opus has a 200K token context window vs DeepSeek V4 Flash's 1.0M. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or DeepSeek V4 Flash?

It depends on your use case. Claude 3 Opus and DeepSeek V4 Flash each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does Claude 3 Opus cost compared to DeepSeek V4 Flash?

Claude 3 Opus costs $15/M input tokens and DeepSeek V4 Flash costs $0.14/M input tokens. DeepSeek V4 Flash is $14.86/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 Claude 3 Opus and DeepSeek V4 Flash on Rival?

This page shows a side-by-side comparison of Claude 3 Opus and DeepSeek V4 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.

More comparisons

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  • DeepSeek V4 Flash vs GPT-6.1 SolLanded Sep 2026

Same lab, same size, long tail

  • Claude 3 Opus vs Claude Sonnet 5.5Version compare
  • Claude 3 Opus vs Claude Opus 5.5Same lab
  • DeepSeek V4 Flash vs DeepSeek V4 Flash Vision ExpSame lab
  • DeepSeek V4 Flash vs DeepSeek V4.1 FlashSame lab
  • DeepSeek V4 Flash vs Qwen3.5 Plus 2026-04-20New provider
  • DeepSeek V4 Flash vs Qwen3.6 27BNew provider
  • DeepSeek V4 Flash vs Qwen3.6 35B A3BNew provider
  • DeepSeek V4 Flash vs Qwen3.6 FlashNew provider

Model pages

  • Claude 3 Opus12 outputs, specs and price
  • DeepSeek V4 Flash71 outputs, specs and price
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