Aion-3.0-Mini vs Kimi K2 0711 vs Grok 4.20

Aion-3.0-Mini at $0.805 in and $1.61 out, Kimi K2 0711 at $0.655 in and $2.65 out, and Grok 4.20 at $1.44 in and $2.88 out — per million tokens, from the same wallet.

Aion-3.0-Mini

AionLabs

0.53¢

for a client proposal

$0.805 in · $1.61 out / 1M

131K context · released 1 month ago

Full page →

Kimi K2 0711

Moonshot AI

0.54¢

for a client proposal

$0.655 in · $2.65 out / 1M

131K context · released July 2025

Full page →

Grok 4.20

xAI

0.95¢

for a client proposal

$1.44 in · $2.88 out / 1M

2M context · released 4 months ago

Full page →

Asking all three at once — identical prompt, identical context — costs about 2¢ for a typical client proposal.

At a glance

Cheapest input: Kimi K2 0711 at $0.655 per million tokens.
Cheapest output: Aion-3.0-Mini at $1.61 per million tokens.
Largest context: Grok 4.20 at 2M tokens — about 2,900 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-Mini

0.24¢

Kimi K2 0711

0.26¢

Grok 4.20

0.43¢

Draft a client proposal from notes

5K in · 800 out

Aion-3.0-Mini

0.53¢

Kimi K2 0711

0.54¢

Grok 4.20

0.95¢

Context-heavy session (Alyph workspace)

155K in · 4K out

Aion-3.0-Mini

needs 155K ctx

Kimi K2 0711

needs 155K ctx

Grok 4.20

$0.23

Analyze a 50-page legal contract

35K in · 1K out

Aion-3.0-Mini

3¢

Kimi K2 0711

2.6¢

Grok 4.20

$0.05

Large architecture refactor

250K in · 3K out

Aion-3.0-Mini

needs 250K ctx

Kimi K2 0711

needs 250K ctx

Grok 4.20

$0.74

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-Mini

Kimi K2 0711

Grok 4.20

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

Pricing

Aion-3.0-Mini

Kimi K2 0711

Grok 4.20

Input / 1M tokens

$0.805

$0.655

$1.44

Output / 1M tokens

$1.61

$2.65

$2.88

Cached input / 1M

$0.207

—

$0.230

Web search

—

0.57¢ / search

Specs

Aion-3.0-Mini

Kimi K2 0711

Grok 4.20

Provider

AionLabs

Moonshot AI

xAI

Released

1 month ago

July 2025

4 months ago

Context window

131K

Max output

33K

100K

—

Input

Text

Text, Images, and Files

Output

Text

Reasoning

Shows its thinking

Answers directly

Shows its thinking

Knowledge cutoff

—

2024-12-31

2025-09-01

Try it with real numbers

2K tokens in · 500 tokens out.

Aion-3.0-Mini

AionLabs

0.24¢

for this task

67% input · 33% output

Full pricing →

Kimi K2 0711

Moonshot AI

0.26¢

for this task

50% input · 50% output

Full pricing →

Grok 4.20

xAI

0.43¢

for this task

67% input · 33% output

Full pricing →

All 3, same prompt and context: 0.94¢. That is the entire cost of the comparison.

Your $5 welcome credit covers about 534 of these.

Which should you pick?

For long documents, Grok 4.20 has the largest context window here — 2M tokens.

On price, Aion-3.0-Mini is the cheapest of the three on a typical task, at about 0.53¢.

For images or files, Grok 4.20 can read them directly; Aion-3.0-Mini and Kimi K2 0711 are text-only.

If you want to watch the model think, Aion-3.0-Mini and Grok 4.20 show reasoning; the other answers directly.

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

Aion-3.0-Mini pricing →Kimi K2 0711 pricing →Grok 4.20 pricing →Try other combinations →

Questions, answered

Which is cheapest — Aion-3.0-Mini, Kimi K2 0711, or Grok 4.20?

On a typical client proposal (5K tokens in, 800 out): Aion-3.0-Mini at 0.53¢; Kimi K2 0711 at 0.54¢; Grok 4.20 at 0.95¢. Long prompts can change the order when long-context rates apply.

Which has the largest context window?

Grok 4.20 — 2M tokens, about 2,900 pages.

Can I run Aion-3.0-Mini, Kimi K2 0711, and Grok 4.20 side by side on Alyph?

Yes — that is what Alyph is built for: the identical prompt with identical context to all 3, answers rendered side by side, billed from one wallet. This exact combination costs about 2¢ for a typical task.

Ask all three at once

Identical prompt, identical context, answers side by side — about 2¢ for a typical client proposal. Free to start, with $5 of credit.