Claude Sonnet 4

Anthropic's balanced frontier family for production chat, coding, and agent workflows.

Pricing

Model Overview

Tracked token-pricing fields for this model family. Empty pricing fields stay hidden until the source publishes them.

Model pricing
Price field	Value
Input	$3.00 / 1M tokens
Output	$15.00 / 1M tokens
Cached read	$0.30 / 1M tokens
Cached write	$3.75 / 1M tokens
Batch discount	50%
Source	Anthropic pricing
Verified	Apr 1, 2026 (High)

Surface

Capabilities

Input and output modalities, enabled feature flags, strengths, and tradeoffs.

Model capabilities
Attribute	Values
Modalities	textimage to text
Capabilities	reasoningimageInputbatchSupportpromptCachingfunctionCallingstructuredOutputs
Strengths	Strong coding and agent planning, Large context window, Stable prompt-caching economics
Tradeoffs	Higher output cost than flash-tier families, No first-party web search surface

References

Official Links

Canonical launch, documentation, pricing, and release-note URLs.

Official model links
Reference	URL
Intro	https://www.anthropic.com/news
Docs	https://docs.anthropic.com
Pricing	https://claude.com/pricing
Release note	https://docs.anthropic.com/en/release-notes/api

Coverage

Benchmark Coverage

Reported benchmark families, versions, scores, sources, and notes.

Benchmark coverage
Benchmark	Version	Score	Date	Source	Notes
SWE-bench Verified	2026-Q1	64.2 pass@1	Feb 10, 2026	Anthropic release notes	Provider-published benchmark evidence.

Lifecycle

Release History

Lifecycle transitions and release timeline for this model family.

Release history
Release	Alias	Lifecycle	Release Date	Deprecation	Shutdown	Summary
Claude Sonnet 4	claude-sonnet-4	Active	May 22, 2025	—	—	Fourth-generation Sonnet family for production workloads.

Surfaces

Host Coverage

Provider-specific hosting, context, pricing notes, feature differences, and provider-status context.

Host coverage
Host	Type	Context	Pricing Note	Differences
Anthropic API	first-party	200.0K	Reference pricing and full prompt-caching semantics.	Prompt caching; Native batch processing
AWS Bedrock	cloud	200.0K	Regional availability and quotas can differ from first-party Anthropic access.	AWS IAM integration; Separate billing

Migration

Migration Guidance

Documented migration summary, successor families, and known breaking changes.

Migration guidance
Topic	Details
Summary	Best default Anthropic family when Opus is too expensive and Haiku is too small for the workload.
Replacement models	claude-opus-4
Breaking changes	Tool-use latency and output depth differ from Opus-tier workloads.

Timeline

Change Events

Cataloged model-family updates and source references.

Change events
Date	Type	Title	Description	Source
May 22, 2025	family_added	Family launched	Claude Sonnet 4 became Anthropic's default balanced frontier family.	Anthropic API release notes

From Anthropic

Other models from Anthropic

Claude 3.7 Sonnet (thinking)