Aion-RP 1.0 (8B) vs Kimi K2.5

Aion-RP 1.0 (8B) at $0.920 in and $1.84 out and Kimi K2.5 at $0.655 in and $3.28 out — per million tokens, from the same wallet.

Aion-RP 1.0 (8B)

AionLabs

0.61¢

for a client proposal

$0.920 in · $1.84 out / 1M

33K context · released February 2025

Full page →

Kimi K2.5

Moonshot AI

0.59¢

for a client proposal

$0.655 in · $3.28 out / 1M

262K context · released 6 months ago

Full page →

Asking all both at once — identical prompt, identical context — costs about 1.2¢ for a typical client proposal.

At a glance

Cheapest input: Kimi K2.5 at $0.655 per million tokens.
Cheapest output: Aion-RP 1.0 (8B) at $1.84 per million tokens.
Largest context: Kimi K2.5 at 262K 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

Aion-RP 1.0 (8B)

0.28¢

Kimi K2.5

0.29¢

Draft a client proposal from notes

5K in · 800 out

Aion-RP 1.0 (8B)

0.61¢

Kimi K2.5

0.59¢

Context-heavy session (Alyph workspace)

155K in · 4K out

Aion-RP 1.0 (8B)

needs 155K ctx

Kimi K2.5

$0.11

Analyze a 50-page legal contract

35K in · 1K out

Aion-RP 1.0 (8B)

needs 35K ctx

Kimi K2.5

2.6¢

Large architecture refactor

250K in · 3K out

Aion-RP 1.0 (8B)

needs 250K ctx

Kimi K2.5

$0.17

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-RP 1.0 (8B)

Kimi K2.5

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

Pricing

Aion-RP 1.0 (8B)

Kimi K2.5

Input / 1M tokens

$0.920

$0.655

Output / 1M tokens

$1.84

$3.28

Cached input / 1M

—

$0.109

Specs

Aion-RP 1.0 (8B)

Kimi K2.5

Provider

AionLabs

Moonshot AI

Released

February 2025

6 months ago

Context window

33K

262K

Max output

33K

262K

Input

Text

Text and Images

Output

Text

Reasoning

Answers directly

Shows its thinking

Knowledge cutoff

2023-12-31

—

Try it with real numbers

2K tokens in · 500 tokens out.

Aion-RP 1.0 (8B)

AionLabs

0.28¢

for this task

67% input · 33% output

Full pricing →

Kimi K2.5

Moonshot AI

0.29¢

for this task

44% input · 56% output

Full pricing →

All 2, same prompt and context: 0.57¢. That is the entire cost of the comparison.

Your $5 welcome credit covers about 875 of these.

Which should you pick?

For long documents, Kimi K2.5 has the largest context window here — 262K tokens.

On price, Kimi K2.5 is the cheapest of the two on a typical task, at about 0.59¢.

For images or files, Kimi K2.5 can read them directly; Aion-RP 1.0 (8B) is text-only.

If you want to watch the model think, Kimi K2.5 shows reasoning; the other answers directly.

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-RP 1.0 (8B) pricing →Kimi K2.5 pricing →Add Lyria 3 Clip Preview Add Grok 4.20

Questions, answered

Which is cheaper, Aion-RP 1.0 (8B) or Kimi K2.5?

On a typical client proposal (5K tokens in, 800 out): Kimi K2.5 at 0.59¢; Aion-RP 1.0 (8B) at 0.61¢. Long prompts can change the order when long-context rates apply.

Which has the largest context window?

Kimi K2.5 — 262K tokens, about 370 pages.

Can I run Aion-RP 1.0 (8B) and Kimi K2.5 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 1.2¢ for a typical task.

Ask both at once

Identical prompt, identical context, answers side by side — about 1.2¢ for a typical client proposal. Free to start, with $5 of credit.