Aion-3.0 vs Gemini 3.1 Pro Preview Custom Tools

Aion-3.0 at $3.45 in and $6.90 out and Gemini 3.1 Pro Preview Custom Tools at $2.30 in and $13.80 out — per million tokens, from the same wallet.

Aion-3.0

AionLabs

2.3¢

for a client proposal

$3.45 in · $6.90 out / 1M

131K context · released 1 month ago

Full page →

Gemini 3.1 Pro Preview Custom Tools

Google

2.3¢

for a client proposal

$2.30 in · $13.80 out / 1M

1.05M context · released 5 months ago

Full page →

Asking all both at once — identical prompt, identical context — costs about 4.5¢ for a typical client proposal.

At a glance

Cheapest input: Gemini 3.1 Pro Preview Custom Tools at $2.30 per million tokens.
Cheapest output: Aion-3.0 at $6.90 per million tokens.
Largest context: Gemini 3.1 Pro Preview Custom Tools at 1.05M tokens — about 1,500 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

Aion-3.0

1¢

Gemini 3.1 Pro Preview Custom Tools

1.1¢

Draft a client proposal from notes

5K in · 800 out

Aion-3.0

2.3¢

Gemini 3.1 Pro Preview Custom Tools

2.3¢

Context-heavy session (Alyph workspace)

155K in · 4K out

Aion-3.0

needs 155K ctx

Gemini 3.1 Pro Preview Custom Tools

$0.41

Analyze a 50-page legal contract

35K in · 1K out

Aion-3.0

$0.13

Gemini 3.1 Pro Preview Custom Tools

$0.09

Large architecture refactor

250K in · 3K out

Aion-3.0

needs 250K ctx

Gemini 3.1 Pro Preview Custom Tools

$1.21

Long-context rate applied at this input size.

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

Aion-3.0

Gemini 3.1 Pro Preview Custom Tools

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

Pricing

Aion-3.0

Gemini 3.1 Pro Preview Custom Tools

Input / 1M tokens

$3.45

$2.30

Output / 1M tokens

$6.90

$13.80

Cached input / 1M

$0.863

$0.230

Web search

—

1.6¢ / search

Specs

Aion-3.0

Gemini 3.1 Pro Preview Custom Tools

Provider

AionLabs

Google

Released

1 month ago

5 months ago

Context window

131K

1.05M

Max output

33K

66K

Input

Text

Text, Audio, Images, Video, and Files

Output

Text

Reasoning

Shows its thinking

Knowledge cutoff

—

Try it with real numbers

2K tokens in · 500 tokens out.

Aion-3.0

AionLabs

1¢

for this task

67% input · 33% output

Full pricing →

Gemini 3.1 Pro Preview Custom Tools

Google

1.1¢

for this task

40% input · 60% output

Full pricing →

All 2, same prompt and context: 2.2¢. That is the entire cost of the comparison.

Your $5 welcome credit covers about 228 of these.

Which should you pick?

For long documents, Gemini 3.1 Pro Preview Custom Tools has the largest context window here — 1.05M tokens.

On price, Gemini 3.1 Pro Preview Custom Tools is the cheapest of the two on a typical task, at about 2.3¢.

For images or files, Gemini 3.1 Pro Preview Custom Tools can read them directly; Aion-3.0 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 →

Aion-3.0 pricing →Gemini 3.1 Pro Preview Custom Tools pricing →Add Lyria 3 Clip Preview Add Grok 4.20

Questions, answered

Which is cheaper, Aion-3.0 or Gemini 3.1 Pro Preview Custom Tools?

On a typical client proposal (5K tokens in, 800 out): Gemini 3.1 Pro Preview Custom Tools at 2.3¢; Aion-3.0 at 2.3¢. Long prompts can change the order when long-context rates apply.

Which has the largest context window?

Gemini 3.1 Pro Preview Custom Tools — 1.05M tokens, about 1,500 pages.

Can I run Aion-3.0 and Gemini 3.1 Pro Preview Custom Tools 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 4.5¢ for a typical task.

Ask both at once

Identical prompt, identical context, answers side by side — about 4.5¢ for a typical client proposal. Free to start, with $5 of credit.