Anthropic: Claude Sonnet 4.5

Balanced Claude model for coding, analysis, agent workflows, and cost control

Model lab: Anthropic
Model family: claude-sonnet

Modalitiestext, image, pdf → text

Context window200,000

Maximum output64,000

InputUSD 2.4 / 1M tokens

OutputUSD 12 / 1M tokens

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Quickstart

Use your Moduck API Key, set the API base URL to https://api.moduck.ai/v1, and set the model parameter to anthropic/claude-sonnet-4-5-20250929.

import os
import requests

base_url = "https://api.moduck.ai/v1"
api_key = os.environ["MODUCK_API_KEY"]
model_id = "anthropic/claude-sonnet-4-5-20250929"

response = requests.post(
    f"{base_url}/chat/completions",
    headers={
        "Authorization": f"Bearer {api_key}",
        "Content-Type": "application/json",
    },
    json={
        "model": model_id,
        "messages": [{"role": "user", "content": "Hello!"}],
        "stream": False,
    },
    timeout=60,
)
response.raise_for_status()
print(response.json())

Use the familiar OpenAI-style chat request format to make model integration easier.

Claude Sonnet 4.5 API Pricing

Type	Price information
Input	USD 2.4 / 1M tokens
Output	USD 12 / 1M tokens
Cached input	USD 0.24 / 1M tokens
Cache write	USD 3 / 1M tokens

Performance

Performance trends

Throughput91.5 tok/sCurrent

Time to first token1.3 sCurrent

End-to-end latency7.1 sCurrent

Throughput

Current91.5 tok/s

Window average89.9 tok/s

Time to first token

Current1.3 s

Window average1.4 s

End-to-end latency

Current7.1 s

Window average7.5 s

Tail latency (P99)

Current15.1 s

Window average16.5 s

Prompt cache hit rate

Current19.2%

Window average23.5%

Error rate

Current0.0%

Window average0.1%

Availability

Uptime100%At least one provider responded

Availability100%Requests actually served

Error rate0%Share of failed requests

Served requests, hour by hour

24 hours agoNow

Claude Sonnet 4.5 Compare models

Model	Input price	Output price	Context window	Capabilities
Claude Sonnet 4.5This page	USD 2.4 / 1M tokens	USD 12 / 1M tokens	200,000	Text output · Reasoning · Tool calling
Claude Sonnet 5.5	USD 1.6 / 1M tokens	USD 8 / 1M tokens	1,000,000	Text output · Reasoning · Tool calling
Claude Sonnet 5	USD 1.152 / 1M tokens	USD 5.76 / 1M tokens	1,000,000	Text output · Reasoning · Tool calling
Claude Sonnet 4.6	USD 2.4 / 1M tokens	USD 12 / 1M tokens	1,000,000	Text output · Reasoning · Tool calling
Claude Sonnet 4.5 (latest)	USD 2.3912 / 1M tokens	USD 11.956 / 1M tokens	200,000	Text output · Reasoning · Tool calling

Model specifications

Input: text, image, pdf
Output: text
Context window: 200,000
Maximum output: 64,000
Release date: 2025-09-29
Attachments: Yes
Reasoning: Yes
Tool calling: Yes
Temperature setting: Yes
Open weights: No

Frequently asked questions

What is Claude Sonnet 4.5 for?

Balanced Claude model for coding, analysis, agent workflows, and cost control

What inputs and outputs does Claude Sonnet 4.5 support?

Recorded inputs: text, images, PDF; outputs: text.

How is Claude Sonnet 4.5 priced?

The pricing table shows the current recorded Moduck price. For example: Input USD 2.4 / 1M tokens; Output USD 12 / 1M tokens. See the pricing table for all units, variants, and conditions.

What specifications are recorded for Claude Sonnet 4.5?

Current model records list Context window 200,000 tokens; Maximum output 64,000 tokens.

What model parameter does the Quickstart use?

The example uses anthropic/claude-sonnet-4-5-20250929. This value comes from the page identifier and is not confirmed as a callable Moduck public ID.

Can I call this model through the Moduck API now?

This page has no verified Moduck API call for this model. A Quickstart example or reserved ID does not establish access; check the models available to your account.