DeepSeek Prover V2 vs 
GPT-5.3-Codex
DeepSeek Prover V2 is cheaper than GPT-5.3-Codex at $0/M vs $1.75/M input tokens.
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
1 promptThree minutes of stand-up. Puns are banned.
DeepSeek Prover V2: 3-Minute Stand-Up Comedy Routine Opening: Hey everyone! How's it going? You know, I've been thinking a lot about relationships lately. Not because I'm in one, but because I'm not. And that's the problem. I'm single, and I'm starting to think that my dating profile is the reason why.
GPT-5.3-Codex: Good evening, everybody! I’ve reached that age where my body sends me passive-aggressive emails. Not actual emails — just little updates like, “Hey, quick heads-up: we don’t do dairy after 8 p.m. anymore.” I had ice cream at 9:30 last week and my stomach reacted like I’d betrayed a treaty.
Price and specs
Not enough votes to call it. On the specs, GPT-5.3-Codex has the edge: newer, bigger context window.
| Spec | DeepSeek Prover V2 | GPT-5.3-Codex |
|---|---|---|
| Input price | Free | $1.75/M tokens |
| Output price | Free | $14/M tokens |
| Context window | 164K tokens | 400K tokens |
| Weights | Open | Closed |
| Free API (OpenRouter) | No | No |
| Released | Apr 2025 | Feb 2026 |
| At 10M a month | $0 | $17.50 |
Input tokens at list price. No caching, no batch discount.
Where to run it
DeepSeek Prover V2
No hosts listed on OpenRouter.
GPT-5.3-Codex2 hosts
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between DeepSeek Prover V2 and GPT-5.3-Codex?
DeepSeek Prover V2 is developed by DeepSeek while GPT-5.3-Codex is developed by OpenAI. DeepSeek Prover V2 has a 164K token context window vs GPT-5.3-Codex's 400K. You can compare their actual outputs across 6 challenges on Rival to see how they differ in practice.
Which is better, DeepSeek Prover V2 or GPT-5.3-Codex?
It depends on your use case. DeepSeek Prover V2 and GPT-5.3-Codex each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 6 challenges so you can judge which fits your needs best.
How much does DeepSeek Prover V2 cost compared to GPT-5.3-Codex?
DeepSeek Prover V2 costs $0/M input tokens and GPT-5.3-Codex costs $1.75/M input tokens. DeepSeek Prover V2 is $1.75/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 Prover V2 and GPT-5.3-Codex on Rival?
This page shows a side-by-side comparison of DeepSeek Prover V2 and GPT-5.3-Codex 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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