Kimi K3 Fast (Fireworks AI) API
About
Build advanced reasoning agents with Kimi K3 Fast (Fireworks AI), a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $4.50/1M input and $22.50/1M output tokens, native tool calling support, open weights architecture. Access Kimi K3 Fast (Fireworks AI) via the LLM Gateway API with up to 1.0M output tokens.
Capabilities
Input Modalities
textimagevideo
Output Modalities
text
Limits
Context Window
1.0M
Tokens
Input Limit
1.0M
Tokens
Max Output
1.0M
Tokens
Pricing
Standard (per 1M tokens)
Input
$4.50
Output
$22.50
Caching (per 1M tokens)
Read
$0.45
Frequently Asked Questions
Kimi K3 Fast (Fireworks AI) by LLM Gateway costs $4.50 per 1M input tokens and $22.50 per 1M output tokens. Cached reads cost $0.45 per 1M tokens.
Model Details
ID
fireworks/kimi-k3-fast
Provider
LLM GatewayFamily
kimi-k3
Release Date
Jul 16, 2026
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
LLMGATEWAY_API_KEY
API Base URL
https://api.llmgateway.io/v1