Model index
Moonshot AI·Kimi

Kimi K1.5

Moonshot’s multimodal reasoning work exploring long-context reinforcement learning and test-time reasoning scale.

LegacyReasoningMultimodalWeights not released
MODEL NUMBER023
Release date
2025-01-20
Organization
Moonshot AI
Family
Kimi
01

Specifications

Only published specifications are shown.

Input modalities
Text · Image
Open weights
No
Status
Legacy
02

Overview

Overview

Moonshot’s multimodal reasoning work exploring long-context reinforcement learning and test-time reasoning scale.

Why it mattered

K1.5 combined long context with RL-based reasoning and provided a research base for later open Kimi agent models.

03

Architecture & capabilities

Key capabilities

ReasoningLong contextReinforcement learning
04

Release history

Announcement

Moonshot published its Kimi K1.5 multimodal reasoning work.

View source
05

Related models

Select a card to view the related model.

06

Sources