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Comparison · AI Models & LLMs

DeepSeek V4 Pro vs GPT-6 Luna

The same method as our rankings: scores from the engine, sourced data, verified prices.

Details: DeepSeek V4 Pro →Details: GPT-6 Luna →

DeepSeek DeepSeek-V4-Pro-0813 — drawn card, not a photograph of the product

DeepSeek V4 Pro

Full sheet →
Context window
1M tokens
Maximum output
384k tokens
Input cost per 1M tokens
$1.32
Output cost per 1M tokens
$3.96
OpenAI gpt-6-luna — drawn card, not a photograph of the product

GPT-6 Luna

OpenAI

Full sheet →
Context window
1.05M tokens
Maximum output
128k tokens
Input cost per 1M tokens
$0.10
Output cost per 1M tokens
$0.50

The numbers side by side

Each bar is the product's verified figure; on every row the longer bar is the higher of the two values.

  • Context windowhigher is better
    DeepSeek V4 Pro1M tokens
    GPT-6 Luna1.05M tokens
  • Maximum outputhigher is better
    DeepSeek V4 Pro384k tokens
    GPT-6 Luna128k tokens
  • Input cost per 1M tokenslower is better
    DeepSeek V4 Pro$1.32
    GPT-6 Luna$0.10
  • Cached input cost per 1M tokenslower is better
    DeepSeek V4 Pro$0.044
    GPT-6 Luna$0.01
  • Output cost per 1M tokenslower is better
    DeepSeek V4 Pro$3.96
    GPT-6 Luna$0.50

Who wins where

  • For long documentsGPT-6 LunaContext window
  • For long answersDeepSeek V4 ProMaximum output
  • Cheaper to readGPT-6 LunaInput cost per 1M tokens
  • Cheaper to writeGPT-6 LunaOutput cost per 1M tokens

GPT-6 Luna: reads images · DeepSeek V4 Pro: open weights (downloadable)

Data sheet side by side

Memory and answer length

Context window1M tokens✓1.05M tokens5% more
Maximum output✓384k tokens200% more128k tokens

API prices

Input cost per 1M tokens$1.32✓$0.1092% less
Cached input cost per 1M tokens$0.044✓$0.0177% less
Output cost per 1M tokens$3.96✓$0.5087% less

Knowledge and abilities

Knowledge cutoffNot statedMay 2026
Reads imagesNot statedYes
Calls tools and functionsYesYes

Size and openness

Parameters1.7 trillionNot stated
Open weights (downloadable)YesNot stated

What a month costs

Change the volumes: the cost is worked out from the verified list prices above.

DeepSeek V4 Pro$4.62per month · $55.44 per year
GPT-6 Luna$0.45per month · $5.40 per yearThe cheaper one — you save $4.17 per month

The scenarios are only starting points to edit, not data about your use. List prices without discounts, time-of-day rates or taxes.

Questions and answers

For long documents: DeepSeek V4 Pro or GPT-6 Luna?

GPT-6 Luna: 1.05M tokens against 1M tokens (Context window).

For long answers: DeepSeek V4 Pro or GPT-6 Luna?

DeepSeek V4 Pro: 384k tokens against 128k tokens (Maximum output).

Cheaper to read: DeepSeek V4 Pro or GPT-6 Luna?

GPT-6 Luna: $0.10 against $1.32 (Input cost per 1M tokens).

Cheaper to write: DeepSeek V4 Pro or GPT-6 Luna?

GPT-6 Luna: $0.50 against $3.96 (Output cost per 1M tokens).

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