Anthropic

Claude Haiku 4.5

Anthropic's latest Haiku model for low-latency, cost-efficient, high-throughput workloads

Category Text Model ID claude-haiku-4-5

Context Length200K tokens

Model TypeLarge Language Model (LLM)

MultimodalText, Image Input

Pricing & Specs

💰 Pricing

Input$1 / M tokens

Output$5 / M tokens

Cache Write$5m: $1.25 / MTok; 1h: $2 / MTok / M tokens

Cache Hit$$0.10 / MTok / M tokens

⚙️ Specs

Context Length200K tokens

Model TypeLarge Language Model (LLM)

MultimodalText, Image Input

Extended ThinkingYes

Adaptive ThinkingNo

Max Output64K tokens

Release DateOctober 15, 2025

Underlying Versionclaude-haiku-4-5-20251001

API CompatibilityClaude API, Claude Code, OpenAI API

API Examples

Python

import anthropic

client = anthropic.Anthropic(
    api_key="your-api-key"
)

message = client.messages.create(
    model="claude-haiku-4-5",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "Hello, Claude!"}
    ]
)

print(message.content[0].text)

cURL

curl https://api.xairouter.com/v1/messages
  -H "Content-Type: application/json"
  -H "x-api-key: YOUR_API_KEY"
  -H "anthropic-version: 2023-06-01"
  -d '{
    "model": "claude-haiku-4-5",
    "max_tokens": 1024,
    "messages": [
      {"role": "user", "content": "Hello, Claude!"}
    ]
  }'

Developer Assist

# Set environment variables in terminal
export ANTHROPIC_AUTH_TOKEN=sk-Xvs...  # Your API Key
export ANTHROPIC_BASE_URL=https://api.xairouter.com

# Start Claude Code
claude

# Now you can use claude-haiku-4-5 model directly for development

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