GPT-6 Astra vs DeepSeek V4 Pro

GPT-6 and DeepSeek V4 at a glance

GPT-6 is an OpenAI model family with 3 variants (Astra, Sol and Luna) available in Quad Chat, with up to 1.05M tokens of context, image input, tool calling and adjustable reasoning. DeepSeek V4 is a DeepSeek model family with 2 variants (Pro and Flash) available in Quad Chat, with up to 1M tokens of context, tool calling and adjustable reasoning. This page compares specifications and plan availability from the Quad Chat model catalog. It does not publish benchmark scores, because quality depends on your task; the quickest fair test is to send the same prompt to both models in one Quad Chat conversation. Where a family has several variants, the head-to-head below uses the top variant (the one needing the highest plan, then the highest output price): GPT-6 Astra for GPT-6 and DeepSeek V4 Pro for DeepSeek V4.

GPT-6 Astra vs DeepSeek V4 Pro

Top variant of each family, side by side. Lab: GPT-6 Astra OpenAI, DeepSeek V4 Pro DeepSeek. Plan needed: GPT-6 Astra Pro ($15/month), DeepSeek V4 Pro Free. Context window: GPT-6 Astra 1.05M tokens, DeepSeek V4 Pro 1M tokens. Max output: GPT-6 Astra 128K tokens, DeepSeek V4 Pro 384K tokens. API input price: GPT-6 Astra $10.00 per 1M, DeepSeek V4 Pro $0.66 per 1M. API output price: GPT-6 Astra $50.00 per 1M, DeepSeek V4 Pro $1.98 per 1M. Image input: GPT-6 Astra Yes, DeepSeek V4 Pro No. Tool calling: GPT-6 Astra Yes, DeepSeek V4 Pro Yes. Reasoning: GPT-6 Astra Yes, adjustable (low, medium, high, xhigh, max), DeepSeek V4 Pro Yes, adjustable (low, high, max). Privacy lane: GPT-6 Astra Private Lane (Zero Data Retention), DeepSeek V4 Pro Private Lane (Zero Data Retention).

Cheapest GPT-6 vs cheapest DeepSeek V4

The lowest-priced variant of each family, for everyday use. Lab: GPT-6 Luna OpenAI, DeepSeek V4 Flash DeepSeek. Plan needed: GPT-6 Luna Free, DeepSeek V4 Flash Free. Context window: GPT-6 Luna 1.05M tokens, DeepSeek V4 Flash 1M tokens. Max output: GPT-6 Luna 128K tokens, DeepSeek V4 Flash 384K tokens. API input price: GPT-6 Luna $0.10 per 1M, DeepSeek V4 Flash $0.076 per 1M. API output price: GPT-6 Luna $0.50 per 1M, DeepSeek V4 Flash $0.15 per 1M. Image input: GPT-6 Luna Yes, DeepSeek V4 Flash No. Tool calling: GPT-6 Luna Yes, DeepSeek V4 Flash Yes. Reasoning: GPT-6 Luna Yes, adjustable (low, medium, high, xhigh, max), DeepSeek V4 Flash Yes, adjustable (low, medium, high). Privacy lane: GPT-6 Luna Private Lane (Zero Data Retention), DeepSeek V4 Flash Private Lane (Zero Data Retention).

Choose GPT-6 or DeepSeek V4

Each point below comes from a real difference in the catalog data. Choose GPT-6 if: You attach screenshots, photos or scans: GPT-6 Astra supports image input, DeepSeek V4 Pro does not. You like choosing a size: GPT-6 comes in 3 variants (GPT-6 Astra, GPT-6 Sol and GPT-6 Luna), against 2. Choose DeepSeek V4 if: You want the lower API list price at the top tier: DeepSeek V4 Pro lists at $0.66 in / $1.98 out against $10.00 in / $50.00 out for GPT-6 Astra, about 25× less per output token. You want a budget variant: DeepSeek V4 Flash is the cheapest in its family at $0.076 in / $0.15 out, below GPT-6 Luna at $0.10 in / $0.50 out. You want top-tier access for less: DeepSeek V4 Pro needs Free, while GPT-6 Astra needs Pro ($15/month). You need very long replies in one go: it can write up to 384K tokens, against 128K. Both families start on the Free plan. Their context windows are within 10% of each other (1.05M and 1M tokens). You do not have to choose: Quad Chat lets you switch between GPT-6 and DeepSeek V4 in the same conversation, or ask both at once and compare the answers.

Every GPT-6 and DeepSeek V4 variant

All selectable variants of both families. Click a header to sort. GPT-6: GPT-6 Astra (Pro), GPT-6 Sol (Pro), GPT-6 Luna (Free). DeepSeek V4: DeepSeek V4 Pro (Free), DeepSeek V4 Flash (Free).

Frequently asked questions

Is GPT-6 or DeepSeek V4 cheaper?

At provider list prices, DeepSeek V4 Pro is cheaper at the top tier ($0.66 in / $1.98 out against $10.00 in / $50.00 out per million tokens). API prices are the model provider's list prices per million tokens, shown for comparison only. Quad Chat plans have a flat monthly price and draw usage from shared credits, so you are not billed per token.

Which has the larger context window, GPT-6 or DeepSeek V4?

GPT-6 reaches 1.05M tokens, against 1M for DeepSeek V4, according to the model catalog Quad Chat routes through. Files, pasted text and earlier messages all count toward the window.

Which Quad Chat plan do I need for GPT-6 and DeepSeek V4?

GPT-6 starts on the Free plan, and its top variant, GPT-6 Astra, needs the Pro ($15/month) plan. All DeepSeek V4 variants need the Free plan. Plans are cumulative, and every plan shares one monthly credit balance (100 on Free up to 25,000 on Max).

Do GPT-6 and DeepSeek V4 support images, tools and reasoning?

GPT-6 Astra: image input yes, tool calling yes, reasoning yes. DeepSeek V4 Pro: image input no, tool calling yes, reasoning yes. Other variants in each family can differ, as the variant table shows.

Can I use GPT-6 and DeepSeek V4 in the same chat?

Yes. In Quad Chat you can switch between models mid-conversation without losing your files or context, or send one prompt to both and compare the answers side by side, which is the most reliable way to decide between them for your own work. Side-by-side comparison is included on every plan.

Is GPT-6 or DeepSeek V4 more private in Quad Chat?

Both top variants run on the Private Lane, routed to providers under Zero Data Retention terms. Quad Chat does not train models on your conversations either way.