DeepSeek V3.1 vs GPT-5.4 Nano

DeepSeek V3.1 at $0.287 in and $1.09 out and GPT-5.4 Nano at $0.230 in and $1.44 out — per million tokens, from the same wallet.

DeepSeek V3.1

DeepSeek

0.23¢

for a client proposal

$0.287 in · $1.09 out / 1M

164K context · released August 2025

Full page →

GPT-5.4 Nano

OpenAI

0.23¢

for a client proposal

$0.230 in · $1.44 out / 1M

400K context · released 5 months ago

Full page →

Asking all both at once — identical prompt, identical context — costs about 0.46¢ for a typical client proposal.

At a glance

Cheapest input: GPT-5.4 Nano at $0.230 per million tokens.
Cheapest output: DeepSeek V3.1 at $1.09 per million tokens.
Largest context: GPT-5.4 Nano at 400K tokens — about 570 pages.

Cost per task

Estimated totals at the rates above. Solid bar is input, lighter bar is output.

Quick code fix

2K in · 500 out

DeepSeek V3.1

0.11¢

GPT-5.4 Nano

0.12¢

Draft a client proposal from notes

5K in · 800 out

DeepSeek V3.1

0.23¢

GPT-5.4 Nano

0.23¢

Context-heavy session (Alyph workspace)

155K in · 4K out

DeepSeek V3.1

4.9¢

GPT-5.4 Nano

4.1¢

Analyze a 50-page legal contract

35K in · 1K out

DeepSeek V3.1

1.1¢

GPT-5.4 Nano

0.95¢

Large architecture refactor

250K in · 3K out

DeepSeek V3.1

needs 250K ctx

GPT-5.4 Nano

$0.06

Solid part of each bar is input tokens, the lighter part is output. Models that don’t fit a task are marked instead of priced.

Cost vs Token Amount

Drag the slider to adjust the split between input and output workload.

80% Input20% Output

DeepSeek V3.1

GPT-5.4 Nano

Adjust the ratio slider to change how output tokens influence the final price for equivalent workloads.

Pricing

DeepSeek V3.1

GPT-5.4 Nano

Input / 1M tokens

$0.287

$0.230

Output / 1M tokens

$1.09

$1.44

Cached input / 1M

$0.149

$0.023

Web search

—

1.1¢ / search

Specs

DeepSeek V3.1

GPT-5.4 Nano

Provider

DeepSeek

OpenAI

Released

August 2025

5 months ago

Context window

164K

400K

Max output

33K

128K

Input

Text

Files, Images, and Text

Output

Text

Reasoning

Shows its thinking

Knowledge cutoff

2025-03-31

2025-08-31

Try it with real numbers

2K tokens in · 500 tokens out.

DeepSeek V3.1

DeepSeek

0.11¢

for this task

51% input · 49% output

Full pricing →

GPT-5.4 Nano

OpenAI

0.12¢

for this task

39% input · 61% output

Full pricing →

All 2, same prompt and context: 0.23¢. That is the entire cost of the comparison.

Your $5 welcome credit covers about 2,173 of these.

Which should you pick?

For long documents, GPT-5.4 Nano has the largest context window here — 400K tokens.

On price, GPT-5.4 Nano is the cheapest of the two on a typical task, at about 0.23¢.

For images or files, GPT-5.4 Nano can read them directly; DeepSeek V3.1 is text-only.

Or don’t pick. Send the identical prompt to all both, read the answers side by side, and keep the winner. How to run a fair bake-off →

DeepSeek V3.1 pricing →GPT-5.4 Nano pricing →Add Lyria 3 Clip Preview Add Grok 4.20

Questions, answered

Which is cheaper, DeepSeek V3.1 or GPT-5.4 Nano?

On a typical client proposal (5K tokens in, 800 out): GPT-5.4 Nano at 0.23¢; DeepSeek V3.1 at 0.23¢. Long prompts can change the order when long-context rates apply.

Which has the largest context window?

GPT-5.4 Nano — 400K tokens, about 570 pages.

Can I run DeepSeek V3.1 and GPT-5.4 Nano side by side on Alyph?

Yes — that is what Alyph is built for: the identical prompt with identical context to all 2, answers rendered side by side, billed from one wallet. This exact combination costs about 0.46¢ for a typical task.

Ask both at once

Identical prompt, identical context, answers side by side — about 0.46¢ for a typical client proposal. Free to start, with $5 of credit.