LLMs

LLMs

Claude Sonnet 4 API

Claude Sonnet 4 brings the power of Claude’s reasoning and coding advancements to a broader audience, offering significant upgrades over Sonnet 3.7 with enhanced instruction-following, tool use, and memory capabilities.

1RPC.ai

Reasoning

Speed

$3

/

$15

Input/Output

200,000

Context Window

Claude Sonnet 4

Claude Sonnet 4 was released on May 22, 2025, as the balanced, scalable counterpart to Claude Opus 4. It delivers strong coding and reasoning capabilities while prioritizing efficiency and lower costs, making it especially suited for enterprise environments and applications needing reliable performance at scale.

The model features Anthropic’s hybrid reasoning architecture, allowing it to alternate between instant responses and extended thinking modes for improved accuracy and more complex problem-solving.

What it’s optimized for

Claude Opus 4 excels at:

  • High-volume, efficient AI tasks requiring fast, accurate reasoning across large context windows

  • Customer-facing chatbots and interactive assistants requiring responsive, human-like dialogue

  • Workflow automation and robotic process automation for complex, multi-step operations

  • Coding assistance and analysis of moderately large codebases

  • Visual data extraction from charts, graphs, and diagrams within multimodal workflows

  • Cost-sensitive enterprise deployments demanding predictable billing and throughput

Typical use cases

Claude Sonnet 4 is well suited for:

  • AI-powered support bots and conversational agents operating in scalable environments

  • Knowledge Q&A over extensive documents, code repositories, and knowledge bases

  • Data science and analytics workflows leveraging automatic extraction from visual and textual inputs

  • Automated content creation and nuanced text analysis with tone and style awareness

  • Business process automation involving instruction following and complex task orchestration

  • Batch processing of large volumes of data with consistent, cost-effective performance

Key characteristics

  • Hybrid reasoning model with both near-instant and extended thinking modes for dynamic task handling

  • Large 200,000-token context window supporting extensive interactions and document analysis

  • Multimodal input capability including native support for text and images such as charts and diagrams

  • Strong coding and reasoning performance, improving over Claude Sonnet 3.7, with practical gains in instruction-following and reliability

  • Supports advanced AI agent features including tool integration and memory with file access capabilities

  • Integrated into Anthropic API, Amazon Bedrock, and Google Cloud Vertex AI for broad developer access

Model architecture

Claude Sonnet 4 is built on Anthropic’s hybrid transformer reasoning architecture, designed to provide flexible, stateful reasoning by interleaving rapid responses with deeper, deliberative “extended thinking.”

This architecture supports large input contexts and native multimodal processing, facilitating multi-step problem solving and dynamic interaction with external tools and memory modules. The model balances performance and cost to serve high-volume AI use cases across industries.

Why choose 1RPC.ai for Claude Sonnet 4

  • Every call is directly tied to the exact model and version used, ensuring traceability and trust in your outputs

  • Execution runs inside hardware-backed enclaves, so the relay can’t access or log your request

  • Connect to multiple AI providers through a single API

  • Avoid provider lock-in with simple, pay-per-prompt pricing

  • Privacy by design with our zero-tracking infrastructure that eliminates metadata leakage and protects your activity

Summary

Claude Sonnet 4 is Anthropic’s versatile, cost-effective AI model that delivers reliable reasoning, coding, and multimodal understanding at scale.

A top choice when you need strong performance and multimodal flexibility without the higher cost and specialized focus of flagship models like Claude Opus 4.

Claude Sonnet 4

Claude Sonnet 4 was released on May 22, 2025, as the balanced, scalable counterpart to Claude Opus 4. It delivers strong coding and reasoning capabilities while prioritizing efficiency and lower costs, making it especially suited for enterprise environments and applications needing reliable performance at scale.

The model features Anthropic’s hybrid reasoning architecture, allowing it to alternate between instant responses and extended thinking modes for improved accuracy and more complex problem-solving.

What it’s optimized for

Claude Opus 4 excels at:

  • High-volume, efficient AI tasks requiring fast, accurate reasoning across large context windows

  • Customer-facing chatbots and interactive assistants requiring responsive, human-like dialogue

  • Workflow automation and robotic process automation for complex, multi-step operations

  • Coding assistance and analysis of moderately large codebases

  • Visual data extraction from charts, graphs, and diagrams within multimodal workflows

  • Cost-sensitive enterprise deployments demanding predictable billing and throughput

Typical use cases

Claude Sonnet 4 is well suited for:

  • AI-powered support bots and conversational agents operating in scalable environments

  • Knowledge Q&A over extensive documents, code repositories, and knowledge bases

  • Data science and analytics workflows leveraging automatic extraction from visual and textual inputs

  • Automated content creation and nuanced text analysis with tone and style awareness

  • Business process automation involving instruction following and complex task orchestration

  • Batch processing of large volumes of data with consistent, cost-effective performance

Key characteristics

  • Hybrid reasoning model with both near-instant and extended thinking modes for dynamic task handling

  • Large 200,000-token context window supporting extensive interactions and document analysis

  • Multimodal input capability including native support for text and images such as charts and diagrams

  • Strong coding and reasoning performance, improving over Claude Sonnet 3.7, with practical gains in instruction-following and reliability

  • Supports advanced AI agent features including tool integration and memory with file access capabilities

  • Integrated into Anthropic API, Amazon Bedrock, and Google Cloud Vertex AI for broad developer access

Model architecture

Claude Sonnet 4 is built on Anthropic’s hybrid transformer reasoning architecture, designed to provide flexible, stateful reasoning by interleaving rapid responses with deeper, deliberative “extended thinking.”

This architecture supports large input contexts and native multimodal processing, facilitating multi-step problem solving and dynamic interaction with external tools and memory modules. The model balances performance and cost to serve high-volume AI use cases across industries.

Why choose 1RPC.ai for Claude Sonnet 4

  • Every call is directly tied to the exact model and version used, ensuring traceability and trust in your outputs

  • Execution runs inside hardware-backed enclaves, so the relay can’t access or log your request

  • Connect to multiple AI providers through a single API

  • Avoid provider lock-in with simple, pay-per-prompt pricing

  • Privacy by design with our zero-tracking infrastructure that eliminates metadata leakage and protects your activity

Summary

Claude Sonnet 4 is Anthropic’s versatile, cost-effective AI model that delivers reliable reasoning, coding, and multimodal understanding at scale.

A top choice when you need strong performance and multimodal flexibility without the higher cost and specialized focus of flagship models like Claude Opus 4.

Claude Sonnet 4

Claude Sonnet 4 was released on May 22, 2025, as the balanced, scalable counterpart to Claude Opus 4. It delivers strong coding and reasoning capabilities while prioritizing efficiency and lower costs, making it especially suited for enterprise environments and applications needing reliable performance at scale.

The model features Anthropic’s hybrid reasoning architecture, allowing it to alternate between instant responses and extended thinking modes for improved accuracy and more complex problem-solving.

What it’s optimized for

Claude Opus 4 excels at:

  • High-volume, efficient AI tasks requiring fast, accurate reasoning across large context windows

  • Customer-facing chatbots and interactive assistants requiring responsive, human-like dialogue

  • Workflow automation and robotic process automation for complex, multi-step operations

  • Coding assistance and analysis of moderately large codebases

  • Visual data extraction from charts, graphs, and diagrams within multimodal workflows

  • Cost-sensitive enterprise deployments demanding predictable billing and throughput

Typical use cases

Claude Sonnet 4 is well suited for:

  • AI-powered support bots and conversational agents operating in scalable environments

  • Knowledge Q&A over extensive documents, code repositories, and knowledge bases

  • Data science and analytics workflows leveraging automatic extraction from visual and textual inputs

  • Automated content creation and nuanced text analysis with tone and style awareness

  • Business process automation involving instruction following and complex task orchestration

  • Batch processing of large volumes of data with consistent, cost-effective performance

Key characteristics

  • Hybrid reasoning model with both near-instant and extended thinking modes for dynamic task handling

  • Large 200,000-token context window supporting extensive interactions and document analysis

  • Multimodal input capability including native support for text and images such as charts and diagrams

  • Strong coding and reasoning performance, improving over Claude Sonnet 3.7, with practical gains in instruction-following and reliability

  • Supports advanced AI agent features including tool integration and memory with file access capabilities

  • Integrated into Anthropic API, Amazon Bedrock, and Google Cloud Vertex AI for broad developer access

Model architecture

Claude Sonnet 4 is built on Anthropic’s hybrid transformer reasoning architecture, designed to provide flexible, stateful reasoning by interleaving rapid responses with deeper, deliberative “extended thinking.”

This architecture supports large input contexts and native multimodal processing, facilitating multi-step problem solving and dynamic interaction with external tools and memory modules. The model balances performance and cost to serve high-volume AI use cases across industries.

Why choose 1RPC.ai for Claude Sonnet 4

  • Every call is directly tied to the exact model and version used, ensuring traceability and trust in your outputs

  • Execution runs inside hardware-backed enclaves, so the relay can’t access or log your request

  • Connect to multiple AI providers through a single API

  • Avoid provider lock-in with simple, pay-per-prompt pricing

  • Privacy by design with our zero-tracking infrastructure that eliminates metadata leakage and protects your activity

Summary

Claude Sonnet 4 is Anthropic’s versatile, cost-effective AI model that delivers reliable reasoning, coding, and multimodal understanding at scale.

A top choice when you need strong performance and multimodal flexibility without the higher cost and specialized focus of flagship models like Claude Opus 4.

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Send your first request to verified LLMs with a single code snippet.

import requests
import json

response = requests.post(
    url="https://1rpc.ai/v1/chat/completions",
    headers={
        "Authorization": "Bearer <1RPC_AI_API_KEY>",
        "Content-type": "application/json",
    },
    data=json.dumps ({
        "model": "claude-sonnet-4-20250514",
        "max_tokens": 1024,
        "messages": [
            {
                "role": "user",
                "content": "What is the meaning of life?"
            }
        ]
    })
)

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import requests
import json

response = requests.post(
    url="https://1rpc.ai/v1/chat/completions",
    headers={
        "Authorization": "Bearer <1RPC_AI_API_KEY>",
        "Content-type": "application/json",
    },
    data=json.dumps ({
        "model": "claude-sonnet-4-20250514",
        "max_tokens": 1024,
        "messages": [
            {
                "role": "user",
                "content": "What is the meaning of life?"
            }
        ]
    })
)

Copy and go

Copied!

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