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Anthropic

claude-sonnet-4-5-20250929

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Model type

Text

Trial status

Trial ready

API routes

2 routes

Catalog created

May 28, 2026

ReasoningLongCreative

Accepted aliases

claude-sonnet-4-5

Specifications

ProviderAnthropic

Model IDclaude-sonnet-4-5-20250929

Model TypeText

Trial AccessTrial ready

Aliases1 accepted

Release Date2025-09-29

Context Window1M tokens

Endpoints2 routes

anthropicPOST

/v1/messages

openaiPOST

/v1/chat/completions

Capabilities

Text

ReasoningLongCreative

Pricing

Input

$3.000

per 1M tokens

Output

$15.000

per 1M tokens

Cache Read

$0.300

per 1M tokens

Cache Write

$6.000

per 1M tokens

Cost Estimate

1K tokens in + 1K out1K in + 1K out$0.0180

10K tokens in + 2K out10K in + 2K out$0.0600

100K tokens in + 10K out100K in + 10K out$0.4500

API Example

Endpoint:

curl --request POST \
  --url https://api.aisa.one/v1/chat/completions \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer $AISA_API_KEY' \
  -d '{
    "model": "claude-sonnet-4-5-20250929",
    "messages": [
      {
        "role": "user",
        "content": "Hello, what can you help me with?"
      }
    ],
    "max_tokens": 1024
  }'

Base URL: https://api.aisa.one

Endpoint: /v1/chat/completions

View API Docs

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Anthropic