Skip to main content

Claude Sonnet 4.5 API pricing, benchmarks and specs | AshnaAI

Anthropic

Claude Sonnet 4.5

Claude Sonnet 4.5 balances intelligence and speed for coding, writing, vision, and tool-based agents.

Try this model API docs

Model details

Model ID: claude-sonnet-4.5
Provider: Anthropic
Modality: Text generation
Context window: 200,000 tokens
Input → output: Text / image → text
Released: Sep 29, 2025
Available on AshnaAI: Oct 3, 2026

Where this model fits

Best capabilities

Multi-step reasoning and complex instruction following
Tool calling and agent workflows
Image and document understanding
Web-connected research tasks

Best for

Complex analysis, planning, research, and high-stakes knowledge work
Tasks where response quality matters more than minimum latency
Agents that need to call APIs or execute multi-step workflows

Not ideal for

Ultra-low-cost, latency-sensitive, high-volume classification

Benchmarks

No comparable, source-verified benchmark has been published for this catalog entry yet.

Pricing (USD)

Limited-time 30% discount

Input / 1M tokens: $3.61$2.53
Output / 1M tokens: $18.07$12.65
Cached input / 1M: $0.361$0.253
Cache write / 1M: $4.52$3.16

Capabilities

reasoningSupported
toolsSupported
visionSupported
web searchSupported
filesSupported

Available regions

US East (N. Virginia)

us-east-1

Europe (Frankfurt)

eu-central-1

Asia Pacific (Mumbai)

ap-south-1

Multi-region and provider failover: Active

Requests automatically switch to another region or provider if one becomes unavailable.