What is the difference between DeepSeek V4 Flash and GPT-6 Astra Pro?

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

Which is better, DeepSeek V4 Flash or GPT-6 Astra Pro?

It depends on your use case. DeepSeek V4 Flash and GPT-6 Astra Pro 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 V4 Flash cost compared to GPT-6 Astra Pro?

DeepSeek V4 Flash costs $0.14/M input tokens and GPT-6 Astra Pro costs $10/M input tokens. DeepSeek V4 Flash is $9.86/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 Flash and GPT-6 Astra Pro on Rival?

This page shows a side-by-side comparison of DeepSeek V4 Flash and GPT-6 Astra 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.

Updated Sep 2026

DeepSeek V4 FlashvsGPT-6 Astra Pro

DeepSeek V4 Flash is cheaper than GPT-6 Astra Pro at $0.14/M vs $10/M input tokens.

DeepSeek V4 Flash and GPT-6 Astra Pro compared across 6 shared prompts
Spec	DeepSeek V4 Flash	GPT-6 Astra Pro
Input price	$0.14/M tokens	$10/M tokens
Output price	$0.28/M tokens	$50/M tokens
Context window	1.0M tokens	1.1M tokens
Weights	Open	Closed
Free API (OpenRouter)	No	No
Released	Apr 2026	Sep 2026

Our Verdict

GPT-6 Astra Pro

DeepSeek V4 FlashRunner-up

Not enough votes to call it. On the specs, GPT-6 Astra Pro has the edge: bigger model tier, newer.

DeepSeek V4 Flash costs 179x 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

Input

$0.14

71× cheaper

Output

$0.28

179× cheaper

GPT-6 Astra Pro

Input

$10.00

Output

$50.00

DeepSeek V4 Flash is cheaper on both: 71× input, 179× output.

Where to run it

19 hosts, cheapest first

DeepSeek V4 Flash17 hosts

HostInOutContextUptime

OpenInferencefp8$0.05 in$0.14 out1M100% up Wafer$0.07 in$0.25 out1M99.5% up StreamLakefp8$0.09 in$0.18 out1M98.1% up DeepInfrafp8$0.09 in$0.18 out1M99.6% up GMI Cloudfp8$0.09 in$0.18 out1M99.9% up Venice$0.10 in$0.19 out1M99.5% up

11 more hosts

DigitalOcean$0.10 in$0.20 out1M100% up SiliconFlowfp8$0.13 in$0.28 out1M91.7% up Alibaba Cloudfp8$0.13 in$0.27 out1M99.8% up AtlasCloudfp4$0.14 in$0.28 out1M100% up Baidu Qianfanfp8$0.14 in$0.28 out1M99.2% up Novitafp8$0.14 in$0.28 out1M99.9% up Parasailfp8$0.14 in$0.28 out1M99.5% up NextBitfp8$0.15 in$0.35 out1M99.9% up Mancerfp8$0.19 in$0.50 out1M99.3% up Phala$0.20 in$0.40 out1M99.6% up Azure AI Foundry$0.21 in$0.56 out1M96.1% up

GPT-6 Astra Pro2 hosts

HostInOutContextUptime

Azure AI Foundry$10.00 in$50.00 out1.1M98.9% up OpenAI$10.00 in$50.00 out1.1M99.6% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

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More comparisons

Cost per 1M tokens

19 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between DeepSeek V4 Flash and GPT-6 Astra Pro?

Which is better, DeepSeek V4 Flash or GPT-6 Astra Pro?

How much does DeepSeek V4 Flash cost compared to GPT-6 Astra Pro?

How can I compare DeepSeek V4 Flash and GPT-6 Astra Pro on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

19 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between DeepSeek V4 Flash and GPT-6 Astra Pro?

Which is better, DeepSeek V4 Flash or GPT-6 Astra Pro?

How much does DeepSeek V4 Flash cost compared to GPT-6 Astra Pro?

How can I compare DeepSeek V4 Flash and GPT-6 Astra Pro on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages