Claude Sonnet 4.5 (batch)

Anthropic chatreasoningtool_usevision Long

API ID: anthropic/claude-4.5-sonnet-20250929

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Input Price
$1.50
/1M tokens
Output Price
$7.50
/1M tokens
Cached Input
$0.15
Save 90%

About Claude Sonnet 4.5 (batch)

Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...

💰
Price Ranking
#1109 lowest price among 1240 Chat models

Model Specifications

Context Length
1.0M
Max Output
64k
Release Date
2025-09-29
Capabilities
chat reasoning tool_use vision
Input Modalities
textimagefile
Output Modalities
text

Best For

  • Complex reasoning, math problems, multi-step logic
  • Image analysis, document understanding, visual Q&A
  • Conversations, content writing, general assistance

Consider Alternatives For

  • Simple Q&A (cheaper models available)

💰 Real-World Cost Examples

Estimated monthly costs for common use cases

Personal AI Assistant
$2.92
/month
50 conversations/day, ~500 tokens each
Customer Service Bot
$90.00
/month
1000 tickets/day, ~800 tokens each
Data Analysis Pipeline
$123.75
/month
500 analyses/day, ~2k tokens each
Calculate Your Custom Usage

Anthropic Model Lineup

Compare all models from Anthropic to find the best fit

Model Input Output Context Capabilities
Claude Sonnet 4.5 (batch) Current Free Free 1.0M chat reasoning tool_use vision
Claude 3.5 Haiku (2024-10-22) Free Free 200k chat vision
Claude 3.5 Sonnet (2024-06-20) Free Free 200k chat vision
Claude 3.5 Sonnet (2024-06-20) Free Free 200k chat vision
Claude 3 Sonnet Free Free 200k chat vision
Claude 3 Sonnet Free Free 200k chat vision
View All Anthropic Models →

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💡 Cheaper Alternatives

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$0.25 $1.25 200k
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Claude Haiku 4.5 (batch)
$0.50 $2.50 200k

Cross Brand

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$0.0050 Free 512
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🚀 Quick Start

Get started with Claude Sonnet 4.5 (batch) API

Anthropic Python SDK 
import anthropic

client = anthropic.Anthropic()

message = client.messages.create(
    model="anthropic/claude-4.5-sonnet-20250929",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "Hello!"}
    ]
)
print(message.content[0].text)

Resources

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