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Synthetic

Kimi K2.5 (NVFP4) API

Synthetic
About

Build advanced reasoning agents with Kimi K2.5 (NVFP4), a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.55/1M input and $2.19/1M output tokens, native tool calling support, open weights architecture. Access Kimi K2.5 (NVFP4) via the Synthetic 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
WeightsOpen
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
262K

Tokens

Input Limit
262K

Tokens

Max Output
66K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.55
Output
$2.19
Frequently Asked Questions

Kimi K2.5 (NVFP4) by Synthetic costs $0.55 per 1M input tokens and $2.19 per 1M output tokens.

Model Details
ID
hf:nvidia/Kimi-K2.5-NVFP4
Provider
Synthetic
Family
kimi
Release Date
Jan 1, 2026
Knowledge Cutoff
Jan 1, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
SYNTHETIC_API_KEY
API Base URL
https://api.synthetic.new/openai/v1
Documentation