DeepSeek V4 Pro vs GPT-6 Astra (2026): Which AI Model Is Better?

Both are popular language models. Here is how DeepSeek V4 Pro and GPT-6 Astra stack up on price, strengths and weaknesses, and which one we would pick.

DeepSeek V4 Pro

DeepSeek's MIT-licensed V4 models with 1M-token context and very low API prices

8.0 /10

Pricing: Open source

Pros

Open weights under the MIT licence, commercial use allowed
1M-token context and up to 384K output tokens
Off-peak API output prices of about $0.60 (Flash) and $1.98 (V4 Pro) per million tokens
Free chat app with an Expert Mode on V4 Pro

Cons

V4 Pro has no vision input; only the Flash model reads images
Peak-hour API prices are double the off-peak rates
Self-hosting V4 Pro (1.6T parameters) needs data-centre hardware
Data processed on the hosted service is subject to Chinese jurisdiction, a concern for some clients

Visit DeepSeek V4 Pro ↗

GPT-6 Astra

OpenAI's GPT-6 family (Astra, Sol, Luna) behind ChatGPT and the OpenAI API

9.0 /10

Pricing: Free plan, paid from $8/mo

Pros

Three tiers let you trade quality for cost: Astra, Sol and Luna
GPT-6 Sol and Luna API prices are half of the GPT-5.6 equivalents
Same model family powers ChatGPT, so drafts and API output behave alike
Wide third-party support in automation tools such as n8n, Make and Zapier

Cons

GPT-6 Astra is expensive on the API at $10 in / $50 out per million tokens
Sol is limited to paid ChatGPT plans; free users get Luna
Closed weights: you cannot self-host or fine-tune locally
Fast release cadence means prompts and outputs shift every few months

Visit GPT-6 Astra ↗

DeepSeek V4 Pro vs GPT-6 Astra at a glance

	DeepSeek V4 Pro	GPT-6 Astra
Editor score	8.0 / 10	9.0 / 10
Pricing model	Open source	Freemium
Starting price	Free	$8/mo
Reader upvotes	0	0
Best for	llm, open-weights, mit	llm, openai, chatgpt
Makes	Blog posts & articles, Ad & marketing copy, Scripts & outlines, Emails & newsletters	Blog posts & articles, Ad & marketing copy, Emails & newsletters, Scripts & outlines
Maker	DeepSeek	OpenAI
Latest release	2026-08	2026-09
Apps offering it	2	17

Our pick

GPT-6 Astra edges it with a score of 9.0 versus 8.0. GPT-6 Astra is the better fit if you value: three tiers let you trade quality for cost: astra, sol and luna, gpt-6 sol and luna api prices are half of the gpt-5.6 equivalents. Choose DeepSeek V4 Pro instead if you need: open weights under the mit licence, commercial use allowed, 1m-token context and up to 384k output tokens.