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AI model reference · 2026

Kimi K2 Thinking

MoonshotAI: Kimi K2 Thinking logoMoonshot AIModel details, evidence, and API facts

Kimi K2 Thinking is Moonshot AI’s most advanced open reasoning model to date, extending the K2 series into agentic, long-horizon reasoning.

Text generation
Reasoning
Provider endpoint accepts tool parameters
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Context window
262,144 tokens
Maximum output
100,352 tokens
Base provider API input
$0.60 / 1M tokens
Base provider API rate
Published evidence
1 benchmark, 0 Arena results

Overview

About Kimi K2 Thinking

A concise catalog overview. Technical limits and published evaluation evidence are listed separately below.

Kimi K2 Thinking is Moonshot AI’s most advanced open reasoning model to date, extending the K2 series into agentic, long-horizon reasoning.

text
reasoning

Published evaluations

Benchmark results

Only results mapped to this exact model and backed by a named source appear here. Different evaluation protocols are not treated as interchangeable.

Source-backed benchmark results for Kimi K2 Thinking
BenchmarkScoreEvaluation detailsSource
SWE-Bench VerifiedA human-validated subset of real GitHub issues used to measure whether a coding agent can produce repository patches that resolve the associated tests.63.4%ResolvedVersion: SWE-Bench Verified 500 · Split: Verified, 500 tasks · Harness: mini-SWE-agent / version 1.17.2 · Attempts: One attemptProtocol note: Harness version: 1.17.2; Run date: 2025-12-10Methodology SWE-benchBenchmark owner

Human preference

Arena results

Arena scores come from blind human preference votes. They are reported separately from task benchmarks and are not used as substitutes for missing benchmark results.

No exact Arena match is available for this model. Similar names and provider variants are not merged automatically.

Technical reference

Specifications and API facts

Technical limits and reference provider prices come from the current catalog unless a reviewed external source is listed. Missing values stay marked as unavailable.

Model
Provider
Moonshot AI
Release date
Not available in reviewed sources
Catalog added
Nov 6, 2025
Context window
262,144 tokens
Maximum output
100,352 tokens
Knowledge cutoff
Not available in reviewed sources
License
Not available in reviewed sources
Capabilities and API
Input types
Text
Output types
Text
Reasoning
Supported
Provider endpoint tool parameters
Accepts tool parameters
Base provider API input
$0.60 / 1M tokens
Base provider cached input
$0.15 / 1M tokens
Base provider API output
$2.50 / 1M tokens

These are reference provider API rates, not Writingmate checkout charges. Access in Writingmate follows the allowances of your Writingmate plan.

Provenance

Sources and update status

Source links are attached to the facts and evaluations they support. Catalog-only values are not presented as independently verified claims.

Evidence last updated Aug 9, 2026.

Catalog record updated Nov 6, 2025.

Catalog-added dates describe when a model entered the catalog, not necessarily its public release date.

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