Claude Haiku 4.5 (latest) API
About
Build advanced reasoning agents with Claude Haiku 4.5 (latest), a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $1.00/1M input and $5.00/1M output tokens, native tool calling support. Access Claude Haiku 4.5 (latest) via the Impossibl API with up to 64K output tokens.
Capabilities
Input Modalities
textimagepdf
Output Modalities
text
Limits
Context Window
200K
Tokens
Input Limit
200K
Tokens
Max Output
64K
Tokens
Pricing
Standard (per 1M tokens)
Input
$1.00
Output
$5.00
Caching (per 1M tokens)
Read
$0.10
Write
$1.25
Frequently Asked Questions
Claude Haiku 4.5 (latest) by Impossibl costs $1.00 per 1M input tokens and $5.00 per 1M output tokens. Cached reads cost $0.10 per 1M tokens. Cache writes cost $1.25 per 1M tokens.
Model Details
ID
anthropic/claude-haiku-4-5
Provider
ImpossiblFamily
claude-haiku
Release Date
Oct 15, 2025
Knowledge Cutoff
Feb 28, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
IMPOSSIBL_API_KEY
API Base URL
https://api.impossibl.com/v1