Anthropic: Claude Sonnet 4.5

anthropic/claude-sonnet-4.5

Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with improvements across system design, code security, and specification adherence. The model is designed for extended autonomous operation, maintaining task continuity across sessions and providing fact-based progress tracking. Sonnet 4.5 also introduces stronger agentic capabilities, including improved tool orchestration, speculative parallel execution, and more efficient context and memory management. With enhanced context tracking and awareness of token usage across tool calls, it is particularly well-suited for multi-context and long-running workflows. Use cases span software engineering, cybersecurity, financial analysis, research agents, and other domains requiring sustained reasoning and tool use.

Model specifications

Context
1,000,000 tokens
Max output
65,536 tokens
Input price
$3 / 1M tokens
Output price
5 / 1M tokens
Released
2026-02-05

Capabilities

  • Playground

Provider pricing, discounts and data privacy

Compare effective provider prices, published discounts, regions, retention policies, training use, compliance, and privacy links by service tier.

Standard service tier

2 available providers · tier input average $3 / 1M tokens · tier output average 5 / 1M tokens

Amazon Bedrock

Tier: Standard · Region: US

Pricing
Input
$3 / 1M tokens
Output
5 / 1M tokens
Cache read
$0.3 / 1M tokens
Cache write
$3.75 / 1M tokens

No provider discount is currently published.

Data privacy and compliance
Region
US
Zero data retention
Yes
Data retention
Zero retention
Used for training
No
Data collection
Moderated
Yes
GDPR compliant
Yes
HIPAA compliant
Yes
SOC 2 certified
Yes
BYOK supported
Yes

Privacy policy · Terms · Official website · Documentation · Status · Support

Anthropic

Tier: Standard · Region: US

Pricing
Input
$3 / 1M tokens
Output
5 / 1M tokens
Cache read
$0.3 / 1M tokens
Cache write
$3.75 / 1M tokens

No provider discount is currently published.

Data privacy and compliance
Region
US
Zero data retention
Yes
Data retention
Zero retention
Used for training
No
Data collection
Moderated
No
GDPR compliant
Yes
HIPAA compliant
Yes
SOC 2 certified
Yes
BYOK supported
Yes

Privacy policy · Terms · Official website · Documentation · Status · Support

Frequently asked questions

What is Anthropic: Claude Sonnet 4.5?
Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with improvements across system design, code security, and specification adherence. The model is designed for extended autonomous operation, maintaining task continuity across sessions and providing fact-based progress tracking. Sonnet 4.5 also introduces stronger agentic capabilities, including improved tool orchestration, speculative parallel execution, and more efficient context and memory management. With enhanced context tracking and awareness of token usage across tool calls, it is particularly well-suited for multi-context and long-running workflows. Use cases span software engineering, cybersecurity, financial analysis, research agents, and other domains requiring sustained reasoning and tool use.
How much does Anthropic: Claude Sonnet 4.5 cost?
Input costs start at $3 / 1M tokens and output costs start at 5 / 1M tokens. Provider-level prices vary by service tier.
What is the context length of Anthropic: Claude Sonnet 4.5?
Anthropic: Claude Sonnet 4.5 supports a 1,000,000 token context window and up to 65,536 output tokens.
What capabilities does Anthropic: Claude Sonnet 4.5 support?
Anthropic: Claude Sonnet 4.5 supports Playground.
Which providers offer Anthropic: Claude Sonnet 4.5?
Anthropic: Claude Sonnet 4.5 is available from Amazon Bedrock, Anthropic.
How do providers handle data privacy for Anthropic: Claude Sonnet 4.5?
2 of 2 providers report that customer data is not used for training, and 2 offer zero-data-retention routing. Retention, compliance, and privacy-policy links are listed per provider.

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