Claude Sonnet 4

Anthropic

DISCONTINUED. The balanced workhorse of Anthropic's first Claude 4 generation (May 2025), pairing strong intelligence with fast, cost-effective inference. Deprecated and scheduled for retirement on June 15, 2026 in favor of Claude Sonnet 4.6. Anthropic retired it on June 15, 2026; all requests to claude-sonnet-4-20250514 on the Claude API now return an error.

Strengths

Strong intelligence-to-cost ratio for production workloads
Extended thinking support with 64K max output
200K context window with vision and tool use

Caveats

DISCONTINUED - retired by Anthropic on June 15, 2026
Migrate to Claude Sonnet 5
200K context trails the 1M offered by Sonnet 4.6

Vendor: Anthropic
Context Window: 200,000 tokens
Max Output: 64,000 tokens
License: Proprietary
Release Date: 2025-05-22
Training Cutoff: 2025-03-31
Modalities: text
image

Capabilities

Vision

Audio

Video

Tool Use

Resources

API Documentation

Pricing

$3 per 1M input tokens, $15 per 1M output tokens. Prompt caching and Batch API (50% off) available.