DeepSeek V4 Pro 0423 vs GPT-5.6 Luna Pro

Price, context window & benchmark comparison

DeepSeek V4 Pro 0423

DeepSeek

$0.94 / $1.88

Input / Output · per 1M tokens

GPT-5.6 Luna Pro

OpenAI

$0.20 / $1.20

Input / Output · per 1M tokens

Compare different models

Verdict: GPT-5.6 Luna Pro is 2.6× cheaper than DeepSeek V4 Pro 0423 on a typical 3:1 input/output mix. GPT-5.6 Luna Pro has the larger context window (1.1M vs 1M).

	DeepSeek V4 Pro 0423	GPT-5.6 Luna Pro
Input price / 1M	$0.94	$0.20
Output price / 1M	$1.88	$1.20
Blended price (3:1)	$1.17	$0.45
Cached input / 1M	$0.0783	$0.02
Context window	1M	1.1M
Max output	384K	128K
Intelligence index	30.4	—
Coding index	59.4	—
Providers	16	5
Best provider uptime (30m)	100.0%	100.0%
Vision input	No	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-04-24	2026-07-09
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, DeepSeek V4 Pro 0423 or GPT-5.6 Luna Pro?

GPT-5.6 Luna Pro is 2.6× cheaper than DeepSeek V4 Pro 0423 on a typical 3:1 input/output mix.

DeepSeek V4 Pro 0423 vs GPT-5.6 Luna Pro: which has a bigger context window?

DeepSeek V4 Pro 0423: 1,048,576 tokens. GPT-5.6 Luna Pro: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: DeepSeek V4 Pro 0423 ≈ $2,819, GPT-5.6 Luna Pro ≈ $1,000.

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