DeepSeek V4.1 Flash vs GPT-5.6 Terra Pro

Price, context window & benchmark comparison

DeepSeek V4.1 Flash

DeepSeek

$0.022 / $0.40

Input / Output · per 1M tokens

GPT-5.6 Terra Pro

OpenAI

$2.00 / $12.00

Input / Output · per 1M tokens

Compare different models

Verdict: DeepSeek V4.1 Flash is 38.6× cheaper than GPT-5.6 Terra Pro on a typical 3:1 input/output mix. GPT-5.6 Terra Pro has the larger context window (1.1M vs 1M).

	DeepSeek V4.1 Flash	GPT-5.6 Terra Pro
Input price / 1M	$0.022	$2.00
Output price / 1M	$0.40	$12.00
Blended price (3:1)	$0.12	$4.50
Cached input / 1M	$0.004	$0.20
Context window	1M	1.1M
Max output	944K	128K
Intelligence index	—	—
Coding index	—	—
Providers	36	—
Best provider uptime (30m)	100.0%	—
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-09-10	2026-07-09
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, DeepSeek V4.1 Flash or GPT-5.6 Terra Pro?

DeepSeek V4.1 Flash is 38.6× cheaper than GPT-5.6 Terra Pro on a typical 3:1 input/output mix.

DeepSeek V4.1 Flash vs GPT-5.6 Terra Pro: which has a bigger context window?

DeepSeek V4.1 Flash: 1,048,576 tokens. GPT-5.6 Terra Pro: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: DeepSeek V4.1 Flash ≈ $244.00, GPT-5.6 Terra Pro ≈ $10,000.

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