GPT-5.4 Nano vs Perceptron Mk1

GPT-5.4 Nano at $0.230 in and $1.44 out and Perceptron Mk1 at $0.172 in and $1.73 out — per million tokens, from the same wallet.

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 →

Perceptron Mk1

Perceptron

0.22¢

for a client proposal

$0.172 in · $1.73 out / 1M

33K context · released 3 months ago

Full page →

Asking all both at once — identical prompt, identical context — costs about 0.45¢ for a typical client proposal.

At a glance

Cheapest input: Perceptron Mk1 at $0.172 per million tokens.
Cheapest output: GPT-5.4 Nano at $1.44 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

GPT-5.4 Nano

0.12¢

Perceptron Mk1

0.12¢

Draft a client proposal from notes

5K in · 800 out

GPT-5.4 Nano

0.23¢

Perceptron Mk1

0.22¢

Context-heavy session (Alyph workspace)

155K in · 4K out

GPT-5.4 Nano

4.1¢

Perceptron Mk1

needs 155K ctx

Analyze a 50-page legal contract

35K in · 1K out

GPT-5.4 Nano

0.95¢

Perceptron Mk1

needs 35K ctx

Large architecture refactor

250K in · 3K out

GPT-5.4 Nano

$0.06

Perceptron Mk1

needs 250K ctx

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

GPT-5.4 Nano

Perceptron Mk1

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

Pricing

GPT-5.4 Nano

Perceptron Mk1

Input / 1M tokens

$0.230

$0.172

Output / 1M tokens

$1.44

$1.73

Cached input / 1M

$0.023

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Web search

1.1¢ / search

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Specs

GPT-5.4 Nano

Perceptron Mk1

Provider

OpenAI

Perceptron

Released

5 months ago

3 months ago

Context window

400K

33K

Max output

128K

Input

Files, Images, and Text

Text, Images, and Video

Output

Text

Reasoning

Shows its thinking

Knowledge cutoff

2025-08-31

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Try it with real numbers

2K tokens in · 500 tokens out.

GPT-5.4 Nano

OpenAI

0.12¢

for this task

39% input · 61% output

Full pricing →

Perceptron Mk1

Perceptron

0.12¢

for this task

29% input · 71% output

Full pricing →

All 2, same prompt and context: 0.24¢. That is the entire cost of the comparison.

Your $5 welcome credit covers about 2,095 of these.

Which should you pick?

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

On price, Perceptron Mk1 is the cheapest of the two on a typical task, at about 0.22¢.

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 →

GPT-5.4 Nano pricing →Perceptron Mk1 pricing →Add Lyria 3 Clip Preview Add Grok 4.20

Questions, answered

Which is cheaper, GPT-5.4 Nano or Perceptron Mk1?

On a typical client proposal (5K tokens in, 800 out): Perceptron Mk1 at 0.22¢; GPT-5.4 Nano 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 GPT-5.4 Nano and Perceptron Mk1 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 0.45¢ for a typical task.

Ask both at once

Identical prompt, identical context, answers side by side — about 0.45¢ for a typical client proposal. Free to start, with $5 of credit.