K2 Think V2 logo
MBZUAI Institute of Foundation Models
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Open weights model

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Released December 2025

K2 Think V2の知能、性能、料金の分析

APIプロバイダーのベンチマーク

モデル概要

知能

17
Artificial Analysis Intelligence Index
知能は4段階中4です。

速度

該当なし
1秒あたりの出力トークン数
速度は4段階中不明です。

入力料金

$0.00
100万トークンあたりのUSD
入力料金は4段階中1です。

出力料金

$0.00
100万トークンあたりのUSD
出力料金は4段階中1です。

冗長性

110M
Intelligence Indexでの出力トークン数
冗長性は4段階中4です。

K2 Think V2の知能は最先端モデルの一群に入ります。料金は割安です。これは同程度の規模の他のオープンウェイトモデルと比較した場合です。 このモデルはテキスト入力に対応し、テキストを出力します。コンテキストウィンドウは262kトークンです。

K2 Think V2のArtificial Analysis Intelligence Indexスコアは17で、同等のモデルの中では平均を大きく上回る水準です（中央値：9）。Intelligence Indexの評価では110Mトークンを生成し、中央値の53Mと比べて非常に冗長でした。

K2 Think V2の料金は入力100万トークンあたり$0.00（競争力が高い、中央値：$0.15）、出力100万トークンあたり$0.00（競争力が高い、中央値：$0.45）です。

推論はい

このページでは、このモデルの推論版を表示しています。

非推論版も存在する可能性があります。

入力モダリティ

対応：テキスト

出力モダリティ

対応：テキスト

コンテキストウィンドウ262k
Arial 12ポイントのA4用紙約393ページ分
総パラメーター数70B
ライセンスApache 2.0
モデルウェイトHugging Face

各指標は同じクラスのモデルと比較します。

  • 非推論モデル → 他の非推論モデルとのみ比較
  • 推論モデル → 推論モデルと非推論モデルの両方と比較
  • オープンウェイトモデル → 同じ規模クラスの他のオープンウェイトモデルとのみ比較：
    • 極小：パラメーター数≤4B
    • 小：パラメーター数4B～40B
    • 中：パラメーター数40B～150B
    • 大：パラメーター数>150B
  • 独自モデル → 入力／出力のブレンド料金を3:1として、同じ料金帯の独自モデルとオープンウェイトモデルを比較：
    • 100万トークンあたり<$0.15
    • 100万トークンあたり$0.15～$1
    • 100万トークンあたり>$1

ハイライト

知能

Artificial Analysis Intelligence Index · Higher is better

速度

Output tokens per second · Higher is better

タスクあたりの費用

Weighted average cost (USD) per Intelligence Index task · Lower is better

知能

Artificial Analysis Intelligence Index

Artificial Analysis Intelligence Index v4.1 incorporates 9 evaluations: GDPval-AA v2, 𝜏³-Banking, Terminal-Bench v2.1, SciCode, Humanity's Last Exam, GPQA Diamond, CritPt, AA-Omniscience, AA-LCR
Reasoning models are indicated by a lightbulb icon

Artificial Analysis Intelligence Index v4.1 includes: GDPval-AA v2, 𝜏³-Banking, Terminal-Bench v2.1, SciCode, Humanity's Last Exam, GPQA Diamond, CritPt, AA-Omniscience, AA-LCR. See Intelligence Index methodology for further details, including a breakdown of each evaluation and how we run them.

Artificial Analysis Intelligence Index by Open Weights / Proprietary

Artificial Analysis Intelligence Index v4.1 incorporates 9 evaluations: GDPval-AA v2, 𝜏³-Banking, Terminal-Bench v2.1, SciCode, Humanity's Last Exam, GPQA Diamond, CritPt, AA-Omniscience, AA-LCR
Reasoning models are indicated by a lightbulb icon

Artificial Analysis Intelligence Index v4.1 includes: GDPval-AA v2, 𝜏³-Banking, Terminal-Bench v2.1, SciCode, Humanity's Last Exam, GPQA Diamond, CritPt, AA-Omniscience, AA-LCR. See Intelligence Index methodology for further details, including a breakdown of each evaluation and how we run them.

Indicates whether the model weights are available. Models are labelled as 'Commercial Use Restricted' if the weights are available but commercial use is limited (typically requires obtaining a paid license).

ベンチマーク

Intelligence Evaluations

Intelligence evaluations measured independently by Artificial Analysis · Higher is better
GDPval-AA v2

Agentic real-world work tasks, (Elo-500)/2000

𝜏³-Banking

Agentic tool use

Terminal-Bench v2.1

Agentic coding & terminal use

SciCode

Coding

Humanity's Last Exam

Reasoning & knowledge

GPQA Diamond

Scientific reasoning

CritPt

Physics reasoning

AA-Omniscience Accuracy

Knowledge

AA-Omniscience Non-Hallucination Rate

1 - hallucination rate

AA-LCR

Long context reasoning

AA-Briefcase

Agentic knowledge work, Elo

AutomationBench-AA

Agentic SaaS workflows

Harvey LAB-AA

Legal agentic work, criterion pass rate

EnterpriseOps-Gym-AANew

Agentic business operations

IFBench

Instruction following

APEX-Agents-AA

Long-horizon agentic tasks

ITBench-AA

Kubernetes incident root-cause analysis

MMMU-Pro

Visual reasoning

Reasoning models are indicated by a lightbulb icon

While model intelligence generally translates across use cases, specific evaluations may be more relevant for certain use cases.

Artificial Analysis Intelligence Index v4.1 includes: GDPval-AA v2, 𝜏³-Banking, Terminal-Bench v2.1, SciCode, Humanity's Last Exam, GPQA Diamond, CritPt, AA-Omniscience, AA-LCR. See Intelligence Index methodology for further details, including a breakdown of each evaluation and how we run them.

AA-Briefcase

AA-Briefcase Elo

AA-Briefcase is an agentic knowledge work benchmark developed by Artificial Analysis. AA-Briefcase Elo is a combined metric that aggregates rubric pass rate, analytical quality Elo and presentation Elo · Higher is better
Reasoning models are indicated by a lightbulb icon

AA-Briefcase Elo is a combined metric that aggregates analytical quality Elo, presentation Elo, and rubric pass rate, with rubric performance converted into Elo via synthetic head-to-head matches. Elo and 95% confidence interval bounds are clamped at 0.

AA-Omniscience

AA-Omniscience Index

AA-Omniscience Index (higher is better) measures knowledge reliability and hallucination. It rewards correct answers, penalizes hallucinations, and has no penalty for refusing to answer. Scores range from -100 to 100, where 0 means as many correct as incorrect answers, and negative scores mean more incorrect than correct.
Reasoning models are indicated by a lightbulb icon

AA-Omniscience Index (higher is better) measures knowledge reliability and hallucination. It rewards correct answers, penalizes hallucinations, and has no penalty for refusing to answer. Scores range from -100 to 100, where 0 means as many correct as incorrect answers, and negative scores mean more incorrect than correct.

Openness Index

Artificial Analysis Openness Index: Score

Openness Index assesses model openness on a 0 to 100 normalized scale (higher is more open)
Reasoning models are indicated by a lightbulb icon

Intelligence Indexの比較

Intelligence Index vs. Cost per Intelligence Index Task

Artificial Analysis Intelligence Index · Weighted average cost (USD) per Artificial Analysis Intelligence Index task
Most attractive quadrant
Pareto line
Reasoning models are indicated by a lightbulb icon

Weighted average cost per Intelligence Index task. Each evaluation’s cost is calculated from input, cache hit, cache write, reasoning, and answer token prices, divided by task count, and weighted by its Intelligence Index weight.

Artificial Analysis Intelligence Index v4.1 includes: GDPval-AA v2, 𝜏³-Banking, Terminal-Bench v2.1, SciCode, Humanity's Last Exam, GPQA Diamond, CritPt, AA-Omniscience, AA-LCR. See Intelligence Index methodology for further details, including a breakdown of each evaluation and how we run them.

トークン使用量

Output Tokens per Intelligence Index Task

Weighted average number of output tokens used to run one task in the Artificial Analysis Intelligence Index
Reasoning models are indicated by a lightbulb icon

The number of tokens required per Intelligence Index task. This is calculated by multiplying the output tokens per eval by the relative weights of each benchmark in the Intelligence Index, then dividing by task count (excluding repeats).

費用

Cost per Intelligence Index Task

Weighted average cost (USD) per Artificial Analysis Intelligence Index task, segmented by token type. Lower is better
Reasoning models are indicated by a lightbulb icon

Weighted average cost per Intelligence Index task. Each evaluation’s cost is calculated from input, cache hit, cache write, reasoning, and answer token prices, divided by task count, and weighted by its Intelligence Index weight.

Cost to Run Artificial Analysis Intelligence Index

Cost (USD) to run all evaluations in the Artificial Analysis Intelligence Index
Reasoning models are indicated by a lightbulb icon

The cost to run the evaluations in the Artificial Analysis Intelligence Index, calculated using the model's input, cache hit, cache write, reasoning, and answer token prices and the number of tokens used across evaluations (excluding repeats).

Pricing: Cache Hit, Input, and Output

Price (USD per M Tokens)
Reasoning models are indicated by a lightbulb icon

Price per token for cached prompts (previously processed), typically offering a significant discount compared to regular input price, represented as USD per million tokens. The values shown here are the cache hit price; cache write and cache storage are billed separately and vary by provider — see "Cache pricing by provider" for detail.

コンテキストウィンドウ

Context Window

Context window: tokens limit · Higher is better
Reasoning models are indicated by a lightbulb icon

Larger context windows are relevant to RAG (Retrieval Augmented Generation) LLM workflows which typically involve reasoning and information retrieval of large amounts of data.

Maximum number of combined input & output tokens. Output tokens commonly have a significantly lower limit (varied by model).

モデル規模（オープンウェイトモデルのみ）

Model Size: Total and Active Parameters

Comparison between total model parameters and parameters active during inference
Reasoning models are indicated by a lightbulb icon

The total number of trainable weights and biases in the model, expressed in billions. These parameters are learned during training and determine the model's ability to process and generate responses.

The number of parameters actually executed during each inference forward pass, expressed in billions. For Mixture of Experts (MoE) models, a routing mechanism selects a subset of experts per token, resulting in fewer active than total parameters. Dense models use all parameters, so active equals total.

よくある質問

K2 Think V2に関するよくある質問

K2 Think V2は2025年12月15日にリリースされました。

K2 Think V2はMBZUAI Institute of Foundation Modelsが開発しました。

K2 Think V2のArtificial Analysis Intelligence Indexスコアは17で、同程度の規模の他のオープンウェイトモデルの中では平均を大きく上回る水準です（中央値：9）。

Intelligence Indexの評価で、K2 Think V2は110M出力トークンを生成しました。同程度の規模の他のオープンウェイトモデルと比べて多い部類水準です（中央値：53M）。

はい。K2 Think V2は推論モデルです。回答前に拡張思考や思考の連鎖による推論を行い、複雑な問題に取り組みます。

K2 Think V2はテキスト入力に対応しています。

K2 Think V2はテキスト出力に対応しています。

いいえ。K2 Think V2は画像入力に対応していません。処理できるのはテキストのみです。

いいえ。K2 Think V2はマルチモーダルではなく、テキスト入力のみに対応しています。

K2 Think V2のコンテキストウィンドウは260kトークンです。これは、モデルが1回のリクエストで処理できるテキストと会話履歴の量を決定します。

はい。K2 Think V2はオープンウェイトモデルです。モデルウェイトが一般公開されており、ダウンロードしてセルフホストできます。

K2 Think V2のパラメーター数は70Bです。

K2 Think V2はApache 2.0ライセンスで公開されており、商用利用が認められています。 ライセンスを表示

K2 Think V2のArtificial Analysis Intelligence Indexスコアは17です。この複合ベンチマークでは、推論、知識、数学、コーディングについてモデルを評価します。

K2 Think V2はセルフホスト可能なオープンウェイトモデルです。 プロバイダーを表示

K2 Think V2は、ダウンロードしてセルフホストできるオープンウェイトモデルです。 プロバイダーを比較