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  5. DeepSeek V4 FlashvsGrok 4.7
Updated Sep 2026

DeepSeek V4 FlashvsGrok 4.7

DeepSeek V4 Flash is cheaper than Grok 4.7 at $0.14/M vs $1.6/M input tokens.

DeepSeek V4 Flash and Grok 4.7 compared across 10 shared prompts
SpecDeepSeek V4 FlashGrok 4.7
Input price$0.14/M tokens$1.6/M tokens
Output price$0.28/M tokens$4.8/M tokens
Context window1.0M tokens500K tokens
WeightsOpenClosed
Free API (OpenRouter)NoNo
ReleasedApr 2026Sep 2026
Side by side

Same prompt, both answers

Opening lines from 5 of the 10 prompts both answered. Formatting stripped, words untouched.

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 Flash1,942 words
Failure Modes, Race Conditions, and Scaling Bottlenecks The described architecture has several critical flaws that compromise reliability, consistency, and scalability. Below is a systematic analysis with proposed solutions and their trade-offs.
Read the full answer
Grok 4.71,399 words
This design will lose edits, split users into inconsistent views, and fall over under concurrent writing. The core problems are clock-based conflict resolution, per-server WebSocket fan-out, polling as the sync path, and treating documents as full HTML snapshots.
Read the full answer

Startup Pitch Teardown

Here's a pitch deck summary for a startup called "MindMeld AI": **Slide 1 - Vision:** "We're building the future of human-AI collaboration.…

DeepSeek V4 Flash618 words
Based on the pitch deck summary, three claims stand out as particularly weak due to lack of specificity, unrealistic benchmarks, or unverifiable assertions. Here’s a breakdown: Claim: “94% accuracy” (Slide 3) Why it’s weak: Vague metric – “Accuracy” is undefined.
Read the full answer
Grok 4.7599 words
Three weakest claims 1. “Predict what you want to type before you think it” (Slide 1) This is scientifically incoherent, not just ambitious. Non-invasive EEG decodes neural activity that is already underway (motor imagery, attempted speech, attention).
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 Flash967 words
This is a fantastic goal. The key for a beginner is consistency over intensity. Trying to overhaul your entire life overnight is a recipe for burnout. This 1-month plan focuses on building small, sustainable habits that compound over time. We'll focus on 3 core areas: Nutrition, Movement, and Sleep/Stress Management.
Read the full answer
Grok 4.7442 words
1-month beginner plan for better health and longevity Focus on three foundations: nutrition, movement, and sleep. Aim for consistency over perfection. If you have a medical condition, check with a clinician before big changes. Week-by-week rhythm Week 1: Build awareness and one easy habit in each area.
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…

DeepSeek V4 Flash1,120 words
To an experienced software engineer (skeptical of "next word prediction") Think of a large language model not as a brain, but as a massive, shared cache of probabilistic completions built from trillions of examples.
Read the full answer
Grok 4.71,173 words
1. Experienced software engineer An LLM is a stateless function from a token sequence to a probability distribution over the next token. Training is a giant batch job: you stream text, run a forward pass, compare the predicted distribution to the actual next token with cross-entropy, and push gradients through billions…
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 Flash348 words
Here’s a simple, hearty, and delicious savory dish using exactly 7 common pantry staples. It comes together in under 30 minutes and feels like a warm hug in a bowl.
Read the full answer
Grok 4.7129 words
Pantry Gold Honey Biscuits A sweet, buttery, slightly salty biscuit that tastes like it took more effort than it did. Ingredients (7) 2 cups all-purpose flour 1 tbsp baking powder ½ tsp salt ¼ cup sugar ½ cup butter (cold) ¾ cup milk 2 tbsp honey Time: about 10 minutes prep, 12–15 minutes bake Instructions Heat the…
Read the full answer
Our Verdict
DeepSeek V4 Flash
DeepSeek V4 Flash
Grok 4.7
Grok 4.7

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

DeepSeek V4 Flash costs 17x less per token.

Too close to call
API pricing

Cost per 1M tokens

DeepSeek V4 Flash
Input
$0.14
11× cheaper
Output
$0.28
17× cheaper
Grok 4.7
Input
$1.60
Output
$4.80

DeepSeek V4 Flash is cheaper on both: 11× input, 17× output.

Where to run it

16 hosts, cheapest first

DeepSeek V4 Flash15 hosts
HostInOutContextUptime
Baidu Qianfanfp8$0.04 in·$0.08 out·1M·93.4% upOOpenInferencefp8$0.04 in·$0.50 out·1M·99.7% upSStreamLakefp8$0.05 in·$0.10 out·1M·98.5% upDDeepInfrafp8$0.09 in·$0.18 out·1M·99.7% upGGMI Cloudfp8$0.09 in·$0.18 out·1M·99.3% upVVenice$0.10 in·$0.19 out·1M·98.8% up
9 more hostsFewer hosts
DDigitalOcean$0.10 in·$0.20 out·1M·99.9% upSSiliconFlowfp8$0.13 in·$0.28 out·1M·98.9% upAlibaba Cloudfp8$0.13 in·$0.27 out·1M·99.5% upAAtlasCloudfp4$0.14 in·$0.28 out·1M·99.9% upNNovitafp8$0.14 in·$0.28 out·1M·100% upPParasailfp8$0.14 in·$0.28 out·1M·99.6% upNNextBitfp8$0.15 in·$0.30 out·1M·97.7% upMMancerfp8$0.19 in·$0.50 out·1M·98% upAzure AI Foundrydegraded$0.21 in·$0.56 out·1M·95.8% up
Grok 4.71 host
HostInOutContextUptime
xAI$1.60 in·$4.80 out·500k·99% up

Per million tokens. Prices and uptime via OpenRouter, checked 22 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

DeepSeek V4 Flash is developed by DeepSeek while Grok 4.7 is developed by xAI. DeepSeek V4 Flash has a 1.0M token context window vs Grok 4.7's 500K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

It depends on your use case. DeepSeek V4 Flash and Grok 4.7 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.

DeepSeek V4 Flash costs $0.14/M input tokens and Grok 4.7 costs $1.6/M input tokens. DeepSeek V4 Flash is $1.46/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 and Grok 4.7 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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