Claude Haiku 4.5

proprietary

The fastest model with near-frontier intelligence

Intelligence
Reasoning
Speed
Context
200K
Max output
64K
Input price
$1/1M tokens
Output price
$5/1M tokens
Snapshotsclaude-haiku-4-5-20251001

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming
Batch Processing

Details

Model IDclaude-haiku-4-5
Provider Anthropic
Creator anthropic
Familyclaude-haiku
Licenseproprietary
Statusactive
Typechat
Input modalitiestext, image
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window200K tokens
Max input—
Max output64K tokens
Reasoning tokens—
Thinking modesExtended
Knowledge cutoff
Training data cutoff
Release date
Retirement date
Priority tierYes
AWS Bedrock IDanthropic.claude-haiku-4-5
GCP Vertex IDclaude-haiku-4-5@20251001
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs
Computer Usecomputer_use
Control a virtual desktop
MCPmcp
Connect to Model Context Protocol servers

Endpoints

MessagesPOST
Create messages with multi-turn conversationshttps://api.anthropic.com/v1/messages

Pricing

Input
$1
Output
$5
Cache write (5m)
$1.25
Cache write (1h)
$2
Cache read
$0.1
Batch in
$0.5
Batch out
$2.5

Family Comparison: claude-haiku

ModelContextMax outPricing
Claude Haiku 5.51M128K—
Claude Haiku 3200K4K$0.25$1.25
Claude Haiku 3——$0.25$1.25
Claude Haiku 3.5——$0.8$4
Claude Haiku 4.5200K64K$1$5

API

GET/v1/models/anthropic/claude-haiku-4-5

Claude Haiku 4.5

claude-haiku-4-5

The fastest model with near-frontier intelligence

claude-haiku-4-5-20251001
Changes · 11 entries
claude-haiku-4-5updateca7a400Nov 2, 2026, 03:02 AM
bedrock_idanthropic.claude-haiku-4-5-20251001-v1:0→anthropic.claude-haiku-4-5
release_date2025-10-15
claude-haiku-4-5update70e2981Sep 24, 2026, 11:29 AM
tools["function_calling"]→["function_calling","computer_use","mcp"]
bedrock_idanthropic.claude-haiku-4-5-20251001-v1:0→anthropic.claude-haiku-4-5
release_date2025-10-15
claude-haiku-4-5update88d97e5Jun 30, 2026, 04:49 AM
tools["function_calling","computer_use","mcp"]→["function_calling"]
claude-haiku-4-5updateeab58fcApr 17, 2026, 02:18 AM
pricingcache write 1h$2
extended_thinkingyes
thinking_modes["extended"]
bedrock_idanthropic.claude-haiku-4-5-20251001-v1:0
vertex_idclaude-haiku-4-5@20251001
retirement_date2026-10-15
claude-haiku-4-5updatef43e286Mar 24, 2026, 04:45 AM
capabilitiesstructured outputyesjson modeyesbatchyes
claude-haiku-4-5update2b100acMar 23, 2026, 05:30 AM
licenseproprietary
open_weightno
page_urlhttps://docs.anthropic.com/en/docs/about-claude/models#cl...
claude-haiku-4-5update7a4f1f6Mar 22, 2026, 05:43 AM
performance3
reasoning3
extended_thinkingyes
training_data_cutoff2025-07
priority_tieryes
model_typechat
claude-haiku-4-5updateb50649fMar 21, 2026, 11:58 PM
taglineThe fastest model with near-frontier intelligence
tools["function_calling","computer_use","mcp"]
endpoints["messages"]
claude-haiku-4-5update2801e21Mar 21, 2026, 07:41 PM
pricingcache write$1.25
claude-haiku-4-5updatec9a70c5Mar 21, 2026, 08:12 AM
knowledge_cutoffFeb 2025→2025-02
claude-haiku-4-5create7f5c66fMar 21, 2026, 05:16 AM