Kimi K2 Thinking vs Kimi K2.5

Kimi K2 Thinking at $0.690 in and $2.88 out and Kimi K2.5 at $0.655 in and $3.28 out — per million tokens, from the same wallet.

Kimi K2 Thinking

Moonshot AI

0.57¢

for a client proposal

$0.690 in · $2.88 out / 1M

262K context · released November 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: Kimi K2 Thinking at $2.88 per million tokens.
Identical context windows: 262K tokens each.

Cost per task

Estimated totals at the rates above. Solid bar is input, lighter bar is output.

Quick code fix

2K in · 500 out

Kimi K2 Thinking

0.28¢

Kimi K2.5

0.29¢

Draft a client proposal from notes

5K in · 800 out

Kimi K2 Thinking

0.57¢

Kimi K2.5

0.59¢

Context-heavy session (Alyph workspace)

155K in · 4K out

Kimi K2 Thinking

$0.12

Kimi K2.5

$0.11

Analyze a 50-page legal contract

35K in · 1K out

Kimi K2 Thinking

2.7¢

Kimi K2.5

2.6¢

Large architecture refactor

250K in · 3K out

Kimi K2 Thinking

$0.18

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

Kimi K2 Thinking

Kimi K2.5

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

Pricing

Kimi K2 Thinking

Kimi K2.5

Input / 1M tokens

$0.690

$0.655

Output / 1M tokens

$2.88

$3.28

Cached input / 1M

$0.172

$0.109

Specs

Kimi K2 Thinking

Kimi K2.5

Provider

Moonshot AI

Released

November 2025

6 months ago

Context window

262K

Max output

100K

262K

Input

Text

Text and Images

Output

Text

Reasoning

Shows its thinking

Knowledge cutoff

—

Try it with real numbers

2K tokens in · 500 tokens out.

Kimi K2 Thinking

Moonshot AI

0.28¢

for this task

49% input · 51% 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: 0.58¢. That is the entire cost of the comparison.

Your $5 welcome credit covers about 866 of these.

Which should you pick?

On price, Kimi K2 Thinking is the cheapest of the two on a typical task, at about 0.57¢.

For images or files, Kimi K2.5 can read them directly; Kimi K2 Thinking 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 →

Kimi K2 Thinking pricing →Kimi K2.5 pricing →Add Lyria 3 Clip Preview Add Grok 4.20

Questions, answered

Which is cheaper, Kimi K2 Thinking or Kimi K2.5?

On a typical client proposal (5K tokens in, 800 out): Kimi K2 Thinking at 0.57¢; Kimi K2.5 at 0.59¢. Long prompts can change the order when long-context rates apply.

Which has the largest context window?

They are identical — 262K tokens each, about 370 pages.

Can I run Kimi K2 Thinking 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.