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Helicone

Kimi K2 (09/05) API

Helicone
About

Process massive datasets with Kimi K2 (09/05), featuring an expansive 262K context window for long-document analysis. This model delivers cost-effective pricing at $0.50/1M input and $2.00/1M output tokens, native tool calling support. Access Kimi K2 (09/05) via the Helicone API with up to 16K output tokens.

Capabilities

Input Modalities

text

Output Modalities

text
Reasoning
No
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
262K

Tokens

Input Limit
262K

Tokens

Max Output
16K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.50
Output
$2.00

Caching (per 1M tokens)

Read
$0.40
Frequently Asked Questions

Kimi K2 (09/05) by Helicone costs $0.50 per 1M input tokens and $2.00 per 1M output tokens. Cached reads cost $0.40 per 1M tokens.

Model Details
ID
kimi-k2-0905
Provider
Helicone
Family
kimi
Release Date
Sep 5, 2025
Knowledge Cutoff
Sep 1, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
HELICONE_API_KEY
API Base URL
https://ai-gateway.helicone.ai/v1
Documentation