Kimi K3 API
About
Build advanced reasoning agents with Kimi K3, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $3.00/1M input and $15.00/1M output tokens, native tool calling support, open weights architecture. Access Kimi K3 via the Fireworks AI API with up to 131K output tokens.
Capabilities
Input Modalities
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Output Modalities
text
Reasoning
Yes
Structured Output
Limits
Context Window
1.0M
Tokens
Input Limit
1.0M
Tokens
Max Output
131K
Tokens
Pricing
Standard (per 1M tokens)
Input
$3.00
Output
$15.00
Caching (per 1M tokens)
Read
$0.30
Frequently Asked Questions
Kimi K3 by Fireworks AI costs $3.00 per 1M input tokens and $15.00 per 1M output tokens. Cached reads cost $0.30 per 1M tokens.
Model Details
ID
accounts/fireworks/models/kimi-k3
Provider
Fireworks AIFamily
kimi-k3
Release Date
Jul 27, 2026
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
FIREWORKS_API_KEY
API Base URL
https://api.fireworks.ai/inference/v1/