Anthropic: Claude Opus 4.6 (Fast) API
About
Build advanced reasoning agents with Anthropic: Claude Opus 4.6 (Fast), a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $30.00/1M input and $150.00/1M output tokens, native tool calling support. Access Anthropic: Claude Opus 4.6 (Fast) via the Kilo Gateway API with up to 128K output tokens.
Capabilities
Input Modalities
imagetext
Output Modalities
text
Reasoning
Yes
Structured Output
Limits
Context Window
1.0M
Tokens
Input Limit
1.0M
Tokens
Max Output
128K
Tokens
Pricing
Standard (per 1M tokens)
Input
$30.00
Output
$150.00
Caching (per 1M tokens)
Read
$3.00
Write
$37.50
Frequently Asked Questions
Anthropic: Claude Opus 4.6 (Fast) by Kilo Gateway costs $30.00 per 1M input tokens and $150.00 per 1M output tokens. Cached reads cost $3.00 per 1M tokens. Cache writes cost $37.50 per 1M tokens.
Model Details
ID
anthropic/claude-opus-4.6-fast
Provider
Kilo GatewayFamily
Release Date
Apr 7, 2026
Knowledge Cutoff
May 31, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
KILO_API_KEY
API Base URL
https://api.kilo.ai/api/gateway