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OpenCode Zen

Kimi K2 Thinking API

OpenCode Zen
About

Build advanced reasoning agents with Kimi K2 Thinking, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.40/1M input and $2.50/1M output tokens, native tool calling support, open weights architecture. Access Kimi K2 Thinking via the OpenCode Zen API with up to 262K output tokens.

Capabilities

Input Modalities

text

Output Modalities

text
Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsOpen
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
262K

Tokens

Input Limit
262K

Tokens

Max Output
262K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.40
Output
$2.50

Caching (per 1M tokens)

Read
$0.40
Frequently Asked Questions

Kimi K2 Thinking by OpenCode Zen costs $0.40 per 1M input tokens and $2.50 per 1M output tokens. Cached reads cost $0.40 per 1M tokens.

Model Details
ID
kimi-k2-thinking
Provider
OpenCode Zen
Family
kimi-thinking
Release Date
Sep 5, 2025
Knowledge Cutoff
Oct 1, 2024
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
OPENCODE_API_KEY
API Base URL
https://opencode.ai/zen/v1
Documentation