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  5. ChatGPT-4o (March 2025)vsDeepSeek V4 Flash Vision Exp
Updated Aug 2026

ChatGPT-4o (March 2025)vsDeepSeek V4 Flash Vision Exp

DeepSeek V4 Flash Vision Exp is cheaper than ChatGPT-4o (March 2025) at $0.22/M vs $5/M input tokens.

ChatGPT-4o (March 2025) and DeepSeek V4 Flash Vision Exp compared across 8 shared prompts
SpecChatGPT-4o (March 2025)DeepSeek V4 Flash Vision Exp
Input price$5/M tokens$0.22/M tokens
Output price$15/M tokens$0.66/M tokens
Context window128K tokens1.0M tokens
Weights—Open
Free API (OpenRouter)NoNo
ReleasedMar 2025Aug 2026
Side by side

Same prompt, both answers

Opening lines from 3 of the 8 prompts both answered. Formatting stripped, words untouched.

Simple 7-Ingredient Recipe

Create a simple recipe for a delicious dish (sweet or savory) using only 7 common pantry ingredients. Include a creative name for the dish…

ChatGPT-4o (March 2025)265 words
Recipe Name: Maple Cinnamon Toast Bites Description: A quick and delicious sweet treat made with pantry staples! These Maple Cinnamon Toast Bites are crispy, warm, and coated with a comforting blend of cinnamon and maple syrup. Perfect for a cozy snack or a fun breakfast twist.
Read the full answer
DeepSeek V4 Flash Vision Exp144 words
Sticky Soy-Glazed Midnight Noodles A sweet-savory, buttery noodle dish that comes together in about 20 minutes with pantry staples. Ingredients (7): 8 oz spaghetti or noodles 3 tbsp butter 3 cloves garlic, thinly sliced 2 tbsp soy sauce 1 tbsp honey ½ tsp chili flakes 1 tbsp sesame seeds Instructions: Cook the noodles…
Read the full answer

Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

ChatGPT-4o (March 2025)441 words
Absolutely! Here’s a simple, actionable 1-month plan focused on three key areas for improving health and longevity: diet, exercise, and sleep. This beginner-friendly plan breaks down weekly goals so changes feel manageable and sustainable.
Read the full answer
DeepSeek V4 Flash Vision Exp565 words
Here’s a simple, beginner-friendly 1-month plan built around three key pillars: Nutrition, Movement, and Sleep & Stress. The goal is small, repeatable habits — not perfection. The 3 Key Areas Nutrition Goal: Eat more whole foods, more protein, and more plants.
Read the full answer

Explain Like I'm a Specific Expert

Explain how a large language model (like GPT or Claude) learns and generates text to each of these three audiences: 1. **An experienced…

ChatGPT-4o (March 2025)704 words
Certainly! Here's how to explain large language models (LLMs) like GPT or Claude to each of your three audiences, with framing and emphasis tailored to their backgrounds and concerns: The Experienced Software Engineer Think of a large language model as a massively distributed, probabilistic autocomplete engine trained…
Read the full answer
DeepSeek V4 Flash Vision Exp869 words
Here is how a large language model learns and generates text, tailored to each of your three audiences. To an Experienced Software Engineer You build distributed systems, so think of an LLM as a massively parallel, lossy compression engine for human text.
Read the full answer
Our Verdict
ChatGPT-4o (March 2025)
ChatGPT-4o (March 2025)
DeepSeek V4 Flash Vision Exp
DeepSeek V4 Flash Vision Exp

Not enough votes to call it. On the specs, nothing separates them.

DeepSeek V4 Flash Vision Exp costs 23x less per token.

Too close to call
API pricing

Cost per 1M tokens

ChatGPT-4o (March 2025)
Input
$5.00
Output
$15.00
DeepSeek V4 Flash Vision Exp
Input
$0.22
23× cheaper
Output
$0.66
23× cheaper

DeepSeek V4 Flash Vision Exp is cheaper on both: 23× input, 23× output.

Where to run it

5 hosts, cheapest first

ChatGPT-4o (March 2025)

No hosts listed on OpenRouter.

DeepSeek V4 Flash Vision Exp5 hosts
HostInOutContextUptime
FFireworks$0.22 in·$0.66 out·1M·99.8% upGGMI Cloudfp8$0.44 in·$1.32 out·1M·99.8% upNNovita$0.44 in·$1.32 out·1M·100% upSSiliconFlowfp8$0.44 in·$1.32 out·1M·97.4% upDDeepInfrafp8degraded$0.22 in·$0.65 out·1M·66.3% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

ChatGPT-4o (March 2025) is developed by OpenAI while DeepSeek V4 Flash Vision Exp is developed by DeepSeek. ChatGPT-4o (March 2025) has a 128K token context window vs DeepSeek V4 Flash Vision Exp's 1.0M. You can compare their actual outputs across 8 challenges on Rival to see how they differ in practice.

It depends on your use case. ChatGPT-4o (March 2025) and DeepSeek V4 Flash Vision Exp each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 8 challenges so you can judge which fits your needs best.

ChatGPT-4o (March 2025) costs $5/M input tokens and DeepSeek V4 Flash Vision Exp costs $0.22/M input tokens. DeepSeek V4 Flash Vision Exp is $4.78/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of ChatGPT-4o (March 2025) and DeepSeek V4 Flash Vision Exp 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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Model pages

ChatGPT-4o (March 2025) logo
ChatGPT-4o (March 2025)33 outputs, specs and price
DeepSeek V4 Flash Vision Exp logo
DeepSeek V4 Flash Vision Exp8 outputs, specs and price
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