Kimi K2.5 (NVFP4) API
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
text
Reasoning
Yes
Structured Output
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
SyntheticFamily
kimi-k2
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