DeepSeek V4.1 Flash vs 
Gemini 2.5 Flash Preview 05-20
DeepSeek V4.1 Flash is the newer model, released after Gemini 2.5 Flash Preview 05-20.
Pokémon Battle UI Recreation
Pokémon battle screen you can actually click. One HTML file.
Loading the build
Loading the build
Which answer wins?
Written rounds
2 promptsThree 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.
Gemini 2.5 Flash Preview 05-20: Alright, alright, settle down you magnificent collection of human beings! You look good tonight. Not just good, but… like you've all collectively decided to nail the 'I'm here to laugh and avoid talking about my Monday' look. And I respect that. Seriously though, it's great to be back on stage. I'm living the dream.
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.
Gemini 2.5 Flash Preview 05-20: Here are 5 jokes for you: 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! I told my wife she was drawing her eyebrows too high. She looked surprised.
Price and specs
Not enough votes to call it. On the specs, DeepSeek V4.1 Flash has the edge: bigger model tier, newer.
| Spec | DeepSeek V4.1 Flash | Gemini 2.5 Flash Preview 05-20 |
|---|---|---|
| Input price | $0.15/M tokens | $0.15/M tokens |
| Output price | $0.6/M tokens | $0.6/M tokens |
| Context window | 1.0M tokens | 1.0M tokens |
| Weights | Open | — |
| Free API (OpenRouter) | No | No |
| Released | Sep 2026 | May 2025 |
| At 10M a month | $1.50 | $1.50 |
Input tokens at list price. No caching, no batch discount.
Where to run it
DeepSeek V4.1 Flash29 hosts
- Relace$0.02 in$0.60 out1M100% up
- OpenInferencefp4$0.02 in$1.00 out1M91.5% up
- Wafer$0.05 in$1.60 out1M100% up
- Morphfp8$0.05 in$1.00 out1M100% up
- InferenceNetfp8$0.07 in$0.60 out1M100% up
- Sail Researchfp4$0.08 in$0.40 out1M100% up
23 more hostsFewer hosts
- Decartfp4$0.09 in$0.18 out1M99.9% up
- Ionstream$0.10 in$1.10 out1M97.4% up
- DekaLLM$0.12 in$1.20 out1M99.7% up
- DeepInfrafp8$0.14 in$0.42 out1M100% up
- StreamLakefp8$0.15 in$0.59 out1M100% up
- DeepSeek$0.15 in$0.60 out1M100% up
- DigitalOcean$0.17 in$0.66 out1M99.8% up
- GMI Cloudfp8$0.18 in$0.72 out1M100% up
- Novitafp8$0.20 in$0.78 out1M100% up
- CoreWeavefp8$0.20 in$0.65 out1M98.8% up
- Phala$0.21 in$0.84 out1M100% up
- Makorafp8$0.27 in$1.15 out1M100% up
- Crusoefp8$0.29 in$1.20 out1M100% up
- Alibaba Cloud$0.30 in$1.20 out1M95.1% up
- AtlasCloudfp8$0.30 in$1.20 out1M99.9% up
- Baidu Qianfanfp8$0.30 in$1.20 out1M100% up
- Basetenfp8$0.30 in$1.20 out1M100% up
- Modal$0.30 in$1.20 out1M100% up
- Parasailfp8$0.30 in$1.20 out1M100% up
- SiliconFlowfp8$0.30 in$1.20 out1M99.6% up
- Together$0.30 in$1.20 out1M99.6% up
- Venicefp8$0.30 in$1.20 out1M100% up
- Fireworks$0.45 in$1.80 out1M100% up
Gemini 2.5 Flash Preview 05-20
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 2.5 Flash Preview 05-20?
DeepSeek V4.1 Flash is developed by DeepSeek while Gemini 2.5 Flash Preview 05-20 is developed by Google AI. DeepSeek V4.1 Flash has a 1.0M token context window vs Gemini 2.5 Flash Preview 05-20's 1.0M. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.
Which is better, DeepSeek V4.1 Flash or Gemini 2.5 Flash Preview 05-20?
It depends on your use case. DeepSeek V4.1 Flash and Gemini 2.5 Flash Preview 05-20 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.
How much does DeepSeek V4.1 Flash cost compared to Gemini 2.5 Flash Preview 05-20?
DeepSeek V4.1 Flash costs $0.15/M input tokens and Gemini 2.5 Flash Preview 05-20 costs $0.15/M input tokens. Gemini 2.5 Flash Preview 05-20 is $0.00/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 2.5 Flash Preview 05-20 on Rival?
This page shows a side-by-side comparison of DeepSeek V4.1 Flash and Gemini 2.5 Flash Preview 05-20 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
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