Perceptron Mk1 vs Step 3.7 Flash

Perceptron Mk1 at $0.172 in and $1.73 out and Step 3.7 Flash at $0.230 in and $1.32 out — per million tokens, from the same wallet.

Perceptron Mk1

Perceptron

0.22¢

for a client proposal

$0.172 in · $1.73 out / 1M

33K context · released 3 months ago

Full page →

Step 3.7 Flash

StepFun

0.22¢

for a client proposal

$0.230 in · $1.32 out / 1M

256K context · released 2 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: Step 3.7 Flash at $1.32 per million tokens.
Largest context: Step 3.7 Flash at 256K tokens — about 370 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

Perceptron Mk1

0.12¢

Step 3.7 Flash

0.11¢

Draft a client proposal from notes

5K in · 800 out

Perceptron Mk1

0.22¢

Step 3.7 Flash

0.22¢

Context-heavy session (Alyph workspace)

155K in · 4K out

Perceptron Mk1

needs 155K ctx

Step 3.7 Flash

4.1¢

Analyze a 50-page legal contract

35K in · 1K out

Perceptron Mk1

needs 35K ctx

Step 3.7 Flash

0.94¢

Large architecture refactor

250K in · 3K out

Perceptron Mk1

needs 250K ctx

Step 3.7 Flash

$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

Perceptron Mk1

Step 3.7 Flash

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

Pricing

Perceptron Mk1

Step 3.7 Flash

Input / 1M tokens

$0.172

$0.230

Output / 1M tokens

$1.73

$1.32

Cached input / 1M

—

$0.046

Specs

Perceptron Mk1

Step 3.7 Flash

Provider

Perceptron

StepFun

Released

3 months ago

2 months ago

Context window

33K

256K

Max output

256K

Input

Text, Images, and Video

Output

Text

Reasoning

Shows its thinking

Knowledge cutoff

—

Try it with real numbers

2K tokens in · 500 tokens out.

Perceptron Mk1

Perceptron

0.12¢

for this task

29% input · 71% output

Full pricing →

Step 3.7 Flash

StepFun

0.11¢

for this task

41% input · 59% 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 2,147 of these.

Which should you pick?

For long documents, Step 3.7 Flash has the largest context window here — 256K tokens.

On price, Step 3.7 Flash 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 →

Perceptron Mk1 pricing →Step 3.7 Flash pricing →Add Lyria 3 Clip Preview Add Grok 4.20

Questions, answered

Which is cheaper, Perceptron Mk1 or Step 3.7 Flash?

On a typical client proposal (5K tokens in, 800 out): Step 3.7 Flash at 0.22¢; Perceptron Mk1 at 0.22¢. Long prompts can change the order when long-context rates apply.

Which has the largest context window?

Step 3.7 Flash — 256K tokens, about 370 pages.

Can I run Perceptron Mk1 and Step 3.7 Flash 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.