> Kimi K2 Thinking is an open-weights AI model from Moonshot, released 6 Nov 2025. Index score 144 (GPT-4 = 100), rank 75 of 229 ranked models. API price $0.60 in / $2.5 out per million tokens, 262K context.

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# Kimi K2 Thinking

Moonshot

Released 6 Nov 2025

Open

Reasoning

[Compare](https://themodelindex.org/compare/kimi-k2-thinking-vs-gemini-3-pro/) [Announcement](https://www.kimi.com/en/blog/kimi-k2-thinking)

144132–156

Index score

#75 of 229 models

3/ 8

Core tests taken

3 of 6 areas · plus 6 anchor tests

−10

Versus the frontier at release

best then: GPT-5

$0.60/ $2.5

Price per million tokens

input / output, list price

262K

Context window

tokens it reads at once

## Where it sits · on the frontier

_Chart: Model Index score of every scored model since late 2022, with the best closed and best open model over time_

o3 reached this score 7 months earlier.

## Test results · by area · tick = best by any model

Show 5 anchor tests

Reasoning & knowledge

evidence

GPQA Diamond

84%

Humanity's Last Exam

no result

Maths

evidence

FrontierMath T1-3

no result

Coding

evidence

SWE-bench Verified

no result

Terminal-Bench

36%

Agents

no evidence yet

APEX-Agents

no result

Novel problems

no evidence yet

ARC-AGI-2

no result

Long tasks

evidence

METR time horizon

54 min

Independent results from the Epoch AI benchmarking hub, best reasoning setting. The core tests are shown here; anchor tests also inform the score and can be shown above.

## What others say · rank on each leaderboard

The Model Index

independent tests, our method

#75

of 219 · 144

Further left is better. Leaderboards measure different things: LMArena is people voting blind between two answers, the others are test scores. Click any row for the source.

## Best at · top three among current models

Not in the top three among current models on any category we track.

Where this model places in the top three of today's models, on category leaderboards and on our core tests.

## Where to use it · prices checked 1 Oct 2026

#### From the lab

Kimi

app · subscription

↗

Moonshot API

API

↗

#### API providers · 2 · per million tokens, in / out

G

Google

$0.60 / $2.5

cheapest

N

Novita

$0.60 / $2.5 · bf16

↗

#### Run it yourself

🤗

Official weights

moonshotai/Kimi-K2-Thinking

↗

Provider prices come from OpenRouter's live listing; going direct to a provider can differ. Subscriptions are the lab's own apps.

## Facts and sources

Released

6 Nov 2025

Announcement

[kimi.com ↗](https://www.kimi.com/en/blog/kimi-k2-thinking)

Release entry

Kimi K2 Thinking

Scored as

Kimi K2 Thinking

Artificial Analysis index

–

Output speed

–

Hugging Face

[moonshotai/Kimi-K2-Thinking ↗](https://huggingface.co/moonshotai/Kimi-K2-Thinking)

## Moonshot releases · around this one

Kimi K2

Open

11 JUL 2025

index 132

Kimi Linear 48B-A3B

Open

30 OCT 2025

Kimi K2 Thinking

Open

6 NOV 2025

index 144

Kimi K2.5

Open

27 JAN 2026

index 149

Kimi K2.6

Open

20 APR 2026

index 156

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Source: https://themodelindex.org/models/kimi-k2-thinking/ · The Model Index · data as of 2026-10-01