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Fireworks AI

Kimi K2 Instruct API

Fireworks AI
About

Process massive datasets with Kimi K2 Instruct, featuring an expansive 128K context window for long-document analysis. This model delivers cost-effective pricing at $1.00/1M input and $3.00/1M output tokens, native tool calling support, open weights architecture. Access Kimi K2 Instruct via the Fireworks AI API with up to 16K output tokens.

Capabilities

Input Modalities

text

Output Modalities

text
Reasoning
No
Structured Output
No
Tool Use
Yes
WeightsOpen
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
128K

Tokens

Input Limit
128K

Tokens

Max Output
16K

Tokens

Pricing

Standard (per 1M tokens)

Input
$1.00
Output
$3.00
Frequently Asked Questions

Kimi K2 Instruct by Fireworks AI costs $1.00 per 1M input tokens and $3.00 per 1M output tokens.

Model Details
ID
accounts/fireworks/models/kimi-k2-instruct
Provider
Fireworks AI
Family
kimi
Release Date
Jul 11, 2025
Knowledge Cutoff
Oct 1, 2024
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
FIREWORKS_API_KEY
API Base URL
https://api.fireworks.ai/inference/v1/
Documentation