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Model comparison · Updated 10 Oct 2026

DeepSeek V4 Flash Vision Exp vs GPT-5.6 Luna

GPT-5.6 Luna is about 1.1× cheaper on input ($0.20 against $0.22 per 1M tokens), though DeepSeek V4 Flash Vision Exp is cheaper on output. GPT-5.6 Luna has the larger context window (1.05M against 1.05M tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $155 a month for DeepSeek V4 Flash Vision Exp and $198 for GPT-5.6 Luna.

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ModelsAtlas. “DeepSeek V4 Flash Vision Exp vs GPT-5.6 Luna”. Retrieved 10 Oct 2026. https://modelsatlas.com/compare/deepseek/v4-flash-vision-exp/vs/openai/gpt-5-6-luna

Model A

DeepSeek V4 Flash Vision Exp

by DeepSeek · weights not marked open · GRIDC5

Input / 1M
$0.22
observed We measured
Source
Our catalogue
Retrieved
10 Oct 2026
Output / 1M$0.65
Context1.05M
vs

Model B

GPT-5.6 Luna

by OpenAI · weights not marked open · GRIDC6

Input / 1M
$0.20
observed We measured
Source
Our catalogue
Retrieved
17 Aug 2026
Output / 1M$1.20
Context1.05M

Key numbers

Standard tier · highlighted = better

DeepSeek V4 Flash Vision Exp
GPT-5.6 Luna
Input / 1M tokens
$0.22
$0.20
Output / 1M tokens
$0.65
$1.20
Batch input / output
Not listed
$0.10 / $0.60
Context window
1,048,576
1,050,000
Input types
Not disclosed
Not disclosed
Weights
Not marked open
Not marked open
Tiers listed
standard
batch, standard
Prices checked
2026-10-10
2026-08-17

What it costs for real workloads

Monthly, standard tier, 30 days

Support chatbot10k chats/day · 1.5k in, 300 out
$155/mo
$198/mo
RAG over documents2k queries/day · 12k in, 500 out
$175/mo
$180/mo
Coding agent300 tasks/day · 60k in, 8k out
$163/mo
$194/mo

DeepSeek V4 Flash Vision Exp   GPT-5.6 Luna · Derived from the standard-tier prices above, input and output tokens per request as stated, 30 days. Excludes caching discounts and batch. Try your own numbers.

On the atlas

Price band (A–H) × context band (1–6)

1 square apart. GPT-5.6 Luna (C6) sits 1 context band larger than DeepSeek V4 Flash Vision Exp (C5).

Same square as DeepSeek V4 Flash Vision Exp: Claude Haiku 5.5 ($0.10), Muse Spark 1.2 Contributor ($0.10), Muse Spark 1.3 Contributor ($0.10). Same square as GPT-5.6 Luna: GPT-6 Luna ($0.10), Llama 4 Scout ($0.10). Open C5 · Open C6

AFreeB<$0.10C$0.10–0.30D$0.30–1E$1–3F$3–10G$10–30H$30+1<32K232–128K3128–256K4256K–1M51M6>1MINPUT PRICE PER 1M TOKENS →CONTEXT WINDOW ↑ · position within a square follows the real valueMiniMax-01 · C5Llama 4 Maverick · C5Qwen3.6 Flash · C5Gemini 3.1 Flash Lite · C5Gemini 3.1 Flash Lite Preview · C5Qwen-Plus · C5Llama 4 Scout · C6GPT-6 Luna · C6DeepSeek V4 Flash Vision ExpDeepSeek V4 Flash Vision ExpGPT-5.6 LunaGPT-5.6 Luna
DeepSeek V4 Flash Vision ExpGPT-5.6 LunaNearest neighboursOpen weights
View the map as a table (2 squares)
SquarePrice bandContext bandModels
GRIDC5$0.10–0.301MDeepSeek V4 Flash Vision Exp, MiniMax-01, Llama 4 Maverick, Qwen3.6 Flash, Gemini 3.1 Flash Lite, Gemini 3.1 Flash Lite Preview, Qwen-Plus
GRIDC6$0.10–0.30>1MGPT-5.6 Luna, Llama 4 Scout, GPT-6 Luna

Capabilities side by side

Only what our records list

DeepSeek V4 Flash Vision Exp
GPT-5.6 Luna
Vision input
Not disclosed
Not disclosed
Audio input
Not disclosed
Not disclosed
Open weights
Not marked open
Not marked open
Batch tier
Not listed
Supported
Free tier
Not listed
Not listed
Thinking tier
Not listed
Not listed

Neither record lists input types, so we do not claim any.

Which should you choose?

Editorial

Choose DeepSeek V4 Flash Vision Exp if…

  • output dominates your bill: $0.65 per 1M output against $1.20

Choose GPT-5.6 Luna if…

  • you pay by the token: it costs $0.20 per 1M input against $0.22
  • your prompts are long: it takes 1,050,000 tokens against 1,048,576
  • work can wait: it lists a batch tier and the other does not

Each reason is a fact from the tables above. Picking between them is our judgement, and we do not benchmark quality: price and context are what we can measure, so test both on your own prompts before you commit.

Questions

Is DeepSeek V4 Flash Vision Exp better than GPT-5.6 Luna?
We do not benchmark quality, so we cannot say. On the recorded numbers: GPT-5.6 Luna is about 1.1× cheaper on input ($0.20 against $0.22 per 1M tokens), though DeepSeek V4 Flash Vision Exp is cheaper on output. GPT-5.6 Luna has the larger context window (1.05M against 1.05M tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $155 a month for DeepSeek V4 Flash Vision Exp and $198 for GPT-5.6 Luna. Which is better for you depends on your task; test both on your own prompts.
Which is cheaper, DeepSeek V4 Flash Vision Exp or GPT-5.6 Luna?
GPT-5.6 Luna: $0.20 against $0.22 per 1M input tokens, and $1.20 against $0.65 per 1M output, on standard pricing.
How much does each cost per 1M tokens?
DeepSeek V4 Flash Vision Exp: $0.22 input and $0.65 output. GPT-5.6 Luna: $0.20 input and $1.20 output. Standard tier, USD.
Which has the larger context window?
GPT-5.6 Luna, with 1,050,000 tokens. DeepSeek V4 Flash Vision Exp has 1,048,576 tokens.
Do both offer batch pricing?
DeepSeek V4 Flash Vision Exp lists no batch tier. GPT-5.6 Luna lists a batch tier, at 50% of its standard price.
Can both read images or audio?
Input types recorded for DeepSeek V4 Flash Vision Exp: none recorded. For GPT-5.6 Luna: none recorded. Where a record lists none we say so rather than guess; check each vendor's documentation before relying on a capability.
Is either model open-weight?
DeepSeek V4 Flash Vision Exp: not marked open-weight in our records. GPT-5.6 Luna: not marked open-weight in our records.
What would each cost for a support chatbot?
At 10,000 chats a day, 1,500 input and 300 output tokens each, 30 days, standard tier: about $155 a month for DeepSeek V4 Flash Vision Exp and $198 for GPT-5.6 Luna. This is our calculation from the listed prices, not a quote.

About the two models

DeepSeek V4 Flash Vision Exp

By DeepSeek. $0.22 input and $0.65 output per 1M tokens, 1.05M context, atlas square C5. Tiers listed: standard.

Full specs & pricing →

GPT-5.6 Luna

By OpenAI. $0.20 input and $1.20 output per 1M tokens, 1.05M context, atlas square C6. Tiers listed: batch, standard.

Full specs & pricing →

Compare DeepSeek V4 Flash Vision Exp with…

Compare GPT-5.6 Luna with…

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