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  5. DeepSeek V4 Flash 0731vsGPT-6 Sol Pro
Updated Sep 2026

DeepSeek V4 Flash 0731vsGPT-6 Sol Pro

DeepSeek V4 Flash 0731 is cheaper than GPT-6 Sol Pro at $0.14/M vs $2/M input tokens.

DeepSeek V4 Flash 0731 and GPT-6 Sol Pro compared across 18 shared prompts
SpecDeepSeek V4 Flash 0731GPT-6 Sol Pro
Input price$0.14/M tokens$2/M tokens
Output price$0.28/M tokens$10/M tokens
Context window1.0M tokens1.1M tokens
WeightsOpenClosed
Free API (OpenRouter)NoNo
ReleasedJul 2026Sep 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 18 prompts both answered. Formatting stripped, words untouched.

Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

DeepSeek V4 Flash 07311,562 words
The 3-Month Longevity & Performance Optimization Protocol (Biohacker Edition) Disclaimer: This protocol is for informational purposes only and is not medical advice. Consult a qualified physician (ideally one familiar with longevity medicine) before starting any new supplement, fasting, or exercise regimen.
Read the full answer
GPT-6 Sol Pro1,411 words
A 12-week longevity and performance plan Aim: improve the health markers most strongly linked to long-term outcomes—cardiorespiratory fitness, strength, blood pressure, metabolic health, sleep, and sustainable habits—while testing whether more experimental “biohacks” add anything useful.
Read the full answer

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…

DeepSeek V4 Flash 0731287 words
Here is a simple, comforting, and deeply flavorful recipe that comes together in just 20 minutes using only 7 common pantry staples. Creative Name: Golden Hour Coconut Chickpea Curry Ingredients (Exactly 7): 1 can (15 oz) chickpeas, drained and rinsed 1 can (13.5 oz) full-fat coconut milk 1 medium yellow onion 3 cloves…
Read the full answer
GPT-6 Sol Pro114 words
Golden Pantry Chickpea Patties Prep: 10 minutes · Cook: 8 minutes · Makes: 6 small patties Ingredients — just 7 1 can (15 oz) chickpeas, drained 3 tbsp all-purpose flour 2 tbsp water 2 tbsp olive oil 1 tsp garlic powder 1 tsp paprika ½ tsp salt Instructions Mash the chickpeas with a fork, leaving a few chunky bits.
Read the full answer

Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

DeepSeek V4 Flash 07311,888 words
This contract is heavily one-sided: it gives the Client nearly all rights and discretion while assigning the Contractor nearly all risk and liability. Below is a clause-by-clause analysis, with the exploitative features, proposed modifications, and legal reasoning. This is general legal information, not legal advice.
Read the full answer
GPT-6 Sol Pro970 words
This is a strongly one-sided draft. Do not sign it as written. The enforceability of particular terms—especially the non-compete, payment provisions, and arbitration clause—depends on the governing jurisdiction, which the agreement does not identify.
Read the full answer

Advanced Investment Memo (IC Memo)

You are writing an internal investment committee memo for a long/short equity fund. Company (fictional): LedgerLift (ticker: LLLT) – B2B…

DeepSeek V4 Flash 0731498 words
INTERNAL INVESTMENT COMMITTEE MEMO To: Investment Committee From: Equity Research Date: October 26, 2023 Subject: LedgerLift (LLLT) – Long Recommendation Recommendation Action: LONG 12-Month Price Target Range: $58 – $74 (Base case intrinsic value: $63/sh) Thesis: LedgerLift is a high-quality B2B SaaS compounder with a…
Read the full answer
GPT-6 Sol Pro974 words
LedgerLift (LLLT) — Investment Committee Memo Recommendation: Short 12-month price target: $30–$44 Thesis. LedgerLift has attractive subscription economics, but at $46 the stock prices in substantially more durable cash flow than the supplied operating assumptions produce: base-case DCF value is about $28 per share…
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…

DeepSeek V4 Flash 0731967 words
Here is a simple, actionable 1-month plan designed for absolute beginners. The goal is consistency over intensity. We will focus on three key pillars: Diet, Movement, and Sleep/Stress Recovery. You don’t need to be perfect—just aim for 80% adherence. If you miss a day, don’t double up tomorrow; just get back on track.
Read the full answer
GPT-6 Sol Pro230 words
A simple 1-month health plan Focus on food, movement, and sleep. Start small enough that you can repeat the habits most days. Week Food Movement Sleep 1: Set a baseline Add a fruit or vegetable to one meal each day. Walk for 10 minutes, 4 days this week. Pick a consistent wake-up time.
Read the full answer

Debug This Architecture

Here's the architecture for a real-time collaborative document editor (like Google Docs): **System Overview:** - Frontend: React SPA with…

DeepSeek V4 Flash 07311,719 words
Failure Modes, Race Conditions, and Scaling Bottlenecks The described architecture has several critical weaknesses that undermine reliability, consistency, and scalability in a real-time collaborative editor. Below is a systematic analysis with proposed solutions and trade-offs.
Read the full answer
GPT-6 Sol Pro1,277 words
The central problem is that this design treats concurrent edits as independent database writes, then tries to reconcile them with client timestamps. That can lose valid edits even when every component is working.
Read the full answer
Our Verdict
DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731
GPT-6 Sol Pro
GPT-6 Sol Pro

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

DeepSeek V4 Flash 0731 costs 36x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

DeepSeek V4 Flash 0731
Input
$0.14
14× cheaper
Output
$0.28
36× cheaper
GPT-6 Sol Pro
Input
$2.00
Output
$10.00

DeepSeek V4 Flash 0731 is cheaper on both: 14× input, 36× output.

Where to run it

31 hosts, cheapest first

DeepSeek V4 Flash 073129 hosts
HostInOutContextUptime
RRelacefp4$0.03 in·$0.32 out·1M·99.8% upSSail Researchfp4$0.03 in·$0.55 out·1M·99% upSStreamLakefp8$0.05 in·$0.16 out·1M·99.6% upDDeepInfrafp8$0.06 in·$0.18 out·1M·99.8% upWWafer$0.08 in·$0.35 out·1M·100% upIInceptronfp4$0.08 in·$0.41 out·1M·99.8% up
23 more hostsFewer hosts
RReka$0.09 in·$0.53 out·262k·99.8% upMMakora$0.09 in·$0.20 out·1M·98.5% upDDigitalOcean$0.12 in·$0.24 out·1M·100% upBBasetenfp8$0.13 in·$0.26 out·1M·100% upCCoreWeavefp8$0.13 in·$0.28 out·262k·99.9% upPParasailfp8$0.14 in·$0.28 out·1M·99.6% upTTogether$0.14 in·$0.28 out·1M·98% upOOpenInferencefp8$0.14 in·$0.70 out·1M·99.2% upMMorph$0.14 in·$0.40 out·1M·99.2% upVVenice$0.17 in·$0.35 out·1M·99.6% upMMancerfp8$0.20 in·$0.60 out·1M·96% upFFireworks$0.22 in·$0.66 out·1M·98.6% upSSiliconFlowfp8$0.22 in·$0.66 out·1M·99.1% upGGMI Cloudfp8$0.29 in·$0.86 out·1M·99.9% upAlibaba Cloud$0.35 in·$1.06 out·1M·99.8% upNNextBitfp8$0.35 in·$1.06 out·1M·99.9% upNNovitafp8$0.41 in·$1.23 out·1M·100% upAAtlasCloudfp4$0.44 in·$1.32 out·1M·97.6% upBaidu Qianfanfp8$0.44 in·$1.32 out·1M·99.9% upCloudflare Workers AI$0.44 in·$1.32 out·1.3M·100% upPPhala$0.44 in·$1.32 out·1M·99.3% upCoheredegraded$0.14 in·$0.28 out·1M·99.3% upNNebiusfp8degraded$0.14 in·$0.28 out·1M·86.3% up
GPT-6 Sol Pro2 hosts
HostInOutContextUptime
Azure AI Foundry$2.00 in·$10.00 out·1.1M·99.9% upOpenAI$2.00 in·$10.00 out·1.1M·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 25 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

DeepSeek V4 Flash 0731 is developed by DeepSeek while GPT-6 Sol Pro is developed by OpenAI. DeepSeek V4 Flash 0731 has a 1.0M token context window vs GPT-6 Sol Pro's 1.1M. You can compare their actual outputs across 18 challenges on Rival to see how they differ in practice.

It depends on your use case. DeepSeek V4 Flash 0731 and GPT-6 Sol 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.

DeepSeek V4 Flash 0731 costs $0.14/M input tokens and GPT-6 Sol Pro costs $2/M input tokens. DeepSeek V4 Flash 0731 is $1.86/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 DeepSeek V4 Flash 0731 and GPT-6 Sol 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.

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Model pages

DeepSeek V4 Flash 0731 logo
DeepSeek V4 Flash 073145 outputs, specs and price
GPT-6 Sol Pro logo
GPT-6 Sol Pro20 outputs, specs and price
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