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NanoGPT

Kimi K2.5 Thinking API

NanoGPT
About

Build advanced reasoning agents with Kimi K2.5 Thinking, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.30/1M input and $1.90/1M output tokens, native tool calling support. Access Kimi K2.5 Thinking via the NanoGPT API with up to 66K output tokens.

Capabilities

Input Modalities

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Output Modalities

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Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Supported
Limits
Context Window
256K

Tokens

Input Limit
256K

Tokens

Max Output
66K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.30
Output
$1.90
Frequently Asked Questions

Kimi K2.5 Thinking by NanoGPT costs $0.30 per 1M input tokens and $1.90 per 1M output tokens.

Model Details
ID
moonshotai/kimi-k2.5:thinking
Provider
NanoGPT
Family
kimi-thinking
Release Date
Jan 26, 2026
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
NANO_GPT_API_KEY
API Base URL
https://nano-gpt.com/api/v1
Documentation