MoonshotAI: Kimi K2 Thinking

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

Context
262K
Max output
98K
Input price
$0.6/1M tokens
Output price
$2.5/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode

Details

Model IDmoonshotai/kimi-k2-thinking
Provider OpenRouter
Creator moonshotai
Familykimi-k2
License—
Status—
Typechat
Input modalitiestext
Output modalitiestext
Open weight—
Parameters—
Architecture—
Context window262K tokens
Max input—
Max output98K tokens
Reasoning tokens—
Knowledge cutoff—
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Pricing

Input
$0.6
Output
$2.5
Cache write
—
Cache read
$0.15
Batch in
—
Batch out
—

Family Comparison: kimi-k2

ModelContextMax outPricing
MoonshotAI: Kimi K2 0711131K98K$0.57$2.3
MoonshotAI: Kimi K2 0905262K98K$0.6$2.5
MoonshotAI: Kimi K2 Thinking262K98K$0.6$2.5

API

GET/v1/models/openrouter/moonshotai/kimi-k2-thinking

MoonshotAI: Kimi K2 Thinking

moonshotai/kimi-k2-thinking

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

Changes · 19 entries
moonshotai/kimi-k2-thinkingupdateca7a400Nov 2, 2026, 03:02 AM
max_output_tokens262144→98304
moonshotai/kimi-k2-thinkingupdatec3d6504Oct 10, 2026, 06:38 AM
max_output_tokens235929→98304
moonshotai/kimi-k2-thinkingupdateb61df6aOct 7, 2026, 06:39 AM
max_output_tokens98304→235929
moonshotai/kimi-k2-thinkingupdate00710a0Oct 6, 2026, 06:38 AM
max_output_tokens235929→98304
moonshotai/kimi-k2-thinkingupdate02333c9Oct 3, 2026, 06:38 AM
max_output_tokens98304→235929
moonshotai/kimi-k2-thinkingupdate2b89bf1Oct 2, 2026, 06:39 AM
max_output_tokens235929→98304
moonshotai/kimi-k2-thinkingupdate8c801e2Oct 1, 2026, 06:40 AM
max_output_tokens98304→235929
moonshotai/kimi-k2-thinkingupdate20b7699Sep 14, 2026, 06:48 AM
max_output_tokens100352→98304
moonshotai/kimi-k2-thinkingupdate8e0a0b7Sep 10, 2026, 06:38 AM
max_output_tokens235929→100352
moonshotai/kimi-k2-thinkingupdate165fbc2Sep 8, 2026, 06:37 AM
max_output_tokens100352→235929
moonshotai/kimi-k2-thinkingupdatebf78dcfJul 25, 2026, 05:49 AM
max_output_tokens262144→100352
moonshotai/kimi-k2-thinkingupdate20c73acJul 17, 2026, 02:34 AM
max_output_tokens100352→262144
moonshotai/kimi-k2-thinkingupdate53ef452Jul 9, 2026, 02:32 AM
pricingcached input$0.6→$0.15
max_output_tokens262144→100352
moonshotai/kimi-k2-thinkingupdate88d97e5Jun 30, 2026, 04:49 AM
pricingcached input$0.15→$0.6
moonshotai/kimi-k2-thinkingupdate5b18252Apr 16, 2026, 07:01 AM
pricingcached input$0.141→$0.15
max_output_tokens262144
moonshotai/kimi-k2-thinkingupdate5c578c7Apr 8, 2026, 03:30 PM
context_window131072→262144
pricinginput$0.47→$0.6output$2→$2.5
moonshotai/kimi-k2-thinkingupdate1cd659eMar 24, 2026, 04:19 AM
capabilitiesjson modeyes
moonshotai/kimi-k2-thinkingupdate2b100acMar 23, 2026, 05:30 AM
familykimi-k2
model_typechat
release_date2025-11-06
taglineKimi K2 Thinking is Moonshot AI’s most advanced open reas...
tools["function_calling"]
moonshotai/kimi-k2-thinkingcreate7f5c66fMar 21, 2026, 05:16 AM