Anthropic

Claude 4.6 Sonnet

Claude Sonnet 4.6 is a text generation model developed by Anthropic, released in February 2026 as an upgrade to the Sonnet line of mid-tier models. It features a 1 million token context window in beta, allowing it to process entire codebases, lengthy legal documents, or large collections of research papers within a single request. The model is designed for coding, agentic workflows, computer use, and professional knowledge work at scale. Sonnet 4.6 is particularly suited for developers and enterprises running high-volume workloads that require consistent instruction following, accurate tool selection, and reliable error correction across long sessions. It includes improved computer use capabilities, enabling it to navigate browsers, fill multi-step web forms, and automate desktop workflows. Anthropic's safety evaluations found it to be as safe as or safer than other recent Claude models, with noted resistance to prompt injection attacks.

Feb 17, 2026 1M context 128,000 tokens output

1M Token Context Advanced Coding Agentic Workflows Computer Use Tool Use MCP Integration

Overview ↓ About ↓ Capabilities ↓ Pricing ↓ Price Comparison ↓ Providers ↓ Parameters ↓ Benchmarks ↓ Compare ↓ Tools ↓ Daily ↓ Resources ↓ Community ↓ FAQ ↓

Model Overview

High-signal model metadata in a structured two-column overview table.

Provider

The entity that provides this model.

Anthropic

Model ID

The routed model identifier exposed by upstream providers.

anthropic/claude-sonnet-4.6

Input Context Window

The number of tokens supported by the input context window.

1M tokens

Maximum Output Tokens

The number of tokens that can be generated by the model in a single request.

128,000 tokens tokens

Open Source

Whether the model's code is available for public use.

Release Date

When the model was first released.

Feb 17, 2026 5 months ago

Knowledge Cut-off Date

When the model's knowledge was last updated.

February 2026

API Providers

The providers that offer this model. This is not an exhaustive list.

Anthropic, Azure, Google, Amazon Bedrock

Modalities

Types of data this model can process.

Text Image Code File

What is Claude 4.6 Sonnet

A fuller summary of positioning, capabilities, and source-specific details for Claude 4.6 Sonnet.

Claude Sonnet 4.6 is a text generation model developed by Anthropic, released in February 2026 as an upgrade to the Sonnet line of mid-tier models. It features a 1 million token context window in beta, allowing it to process entire codebases, lengthy legal documents, or large collections of research papers within a single request. The model is designed for coding, agentic workflows, computer use, and professional knowledge work at scale.

Sonnet 4.6 is particularly suited for developers and enterprises running high-volume workloads that require consistent instruction following, accurate tool selection, and reliable error correction across long sessions. It includes improved computer use capabilities, enabling it to navigate browsers, fill multi-step web forms, and automate desktop workflows. Anthropic's safety evaluations found it to be as safe as or safer than other recent Claude models, with noted resistance to prompt injection attacks.

Capabilities

What Claude 4.6 Sonnet supports

CTX

1M Token Context

Accepts up to 1 million tokens in a single request (beta), enabling reasoning across entire codebases, lengthy contracts, or dozens of documents at once.

</>

Advanced Coding

Supports the full software development lifecycle including planning, implementation, debugging, and large-scale refactors across multiple files.

Agentic Workflows

Handles long-running, multi-step autonomous tasks with improved instruction following, tool selection, and error correction over extended sessions.

Computer Use

Controls browsers and desktop software to navigate complex spreadsheets, fill multi-step web forms, and automate workflows that previously required human intervention.

Tool Use

Supports structured tool calling, allowing the model to invoke external functions and APIs as part of a reasoning or task-completion workflow.

MCP

MCP Integration

Compatible with Model Context Protocol (MCP) servers, enabling connection to external data sources and services through a standardized interface.

Reasoning

Applies multi-step reasoning to complex professional tasks including financial analysis, research synthesis, and frontend code generation.

Safety Guardrails

Includes Anthropic's safety evaluations with documented resistance to prompt injection attacks, rated as safe as or safer than other recent Claude models.

Pricing for Claude 4.6 Sonnet

Primary API pricing shown in the same “quick compare” spirit as the reference page.

Input tokens $3.00 Per million tokens

Output tokens $15.00 Per million tokens

Price Comparison

Additional usage-cost dimensions synced into the project for this model.

Web search $10000.00

Cache read $0.30

Cache write $3.75

maxTemperature 1

maxResponseSize 128,000 tokens

API Access & Providers

Places where this model is available, based on the synced detail-page metadata.

Anthropic Azure Google Amazon Bedrock

Provider Endpoints

Endpoint-level provider data currently available for this model.

Anthropic

Max output: 128,000 1d uptime: 99.8% Supported params: 12 Implicit caching: No

Azure

Max output: 128,000 1d uptime: 99.8% Supported params: 14 Implicit caching: No

Google

Max output: 128,000 1d uptime: 100.0% Supported params: 11 Implicit caching: No

Anthropic

Max output: 128,000 1d uptime: 97.0% Supported params: 12 Implicit caching: No

Amazon Bedrock

Max output: 128,000 1d uptime: 99.8% Supported params: 13 Implicit caching: No

Google

Max output: 128,000 1d uptime: 100.0% Supported params: 11 Implicit caching: No

Google

Max output: 128,000 Supported params: 11 Implicit caching: No

Amazon Bedrock

Max output: 128,000 Supported params: 13 Implicit caching: No

Configuration & Parameters

The configurable options currently documented for this model.

Reasoning

Select

When enabled, the model will explain its thought process step-by-step before providing a final answer. This can help users understand how the model arrived at its conclusions, but may result in longer responses. The model dynamically decides when and how much to think.

Default: false

Disabled Enabled

Supported Request Parameters

Parameters currently listed by OpenRouter or the local catalog for this model.

Reasoning

Model Performance

Benchmark scores synced from the current model source and normalized into the local catalog.

Benchmark	Score
ARC-AGI-2 Novel abstract reasoning and pattern recognition	58.3%
Finance Agent Financial analysis and decision-making tasks	63.3%
GPQA Diamond PhD-level science questions (biology, physics, chemistry)	79.9%
HLE Questions that challenge frontier models across many domains	13.2%
IFBench Instruction following accuracy	41.2%
Long Context Reasoning Reasoning across long documents and contexts	57.7%
MATH-500 Undergraduate and competition-level math problems	97.8%
MCP-Atlas Tool Use Structured tool use via Model Context Protocol	61.3%
MMLU-Pro Expert knowledge across 14 academic disciplines	79.1%
MMMB Multilingual and multimodal understanding	76.1%
OSWorld-Verified Autonomous computer use and desktop tasks	72.5%
SciCode Scientific research coding and numerical methods	46.9%
SWE-bench Verified Real GitHub issues requiring multi-file code fixes	79.6%
Terminal-Bench 2.0 Agentic coding and terminal command tasks	59.1%
TerminalBench Hard Agentic coding and terminal command tasks	46.2%
τ²-Bench Agentic tool use in realistic scenarios	79.5%
τ²-bench Retail Agentic tool use in retail scenarios	91.7%
τ²-bench Telecom Agentic tool use in telecom scenarios	97.9%

Resources & Documentation

Official model cards, release notes, docs, and other references synced from the source page.

Announcement Blog Post Announcements

→

Product Page Other

→

What's New in Claude 4.6 Documentation

→

Models Overview & API Reference Documentation

→

Model Card / System Card Research

→

About Claude

→

Anthropic Prompt Engineering Resources

→

Official Website

→

Acceptable Use Policy

→

Anthropic Trust Center

→

OpenRouter Model Page OpenRouter

→