Technology
Claude Sonnet 4
Anthropic's mid-tier model: balances state-of-the-art coding (72.7% on SWE-bench) with cost-efficiency for high-volume, agentic workflows.
Claude Sonnet 4, released May 22, 2025, is Anthropic's versatile, mid-tier model (successor to Sonnet 3.7). It delivers superior coding performance, achieving a state-of-the-art 72.7% on SWE-bench. The model features hybrid reasoning: it offers both near-instant responses and an 'extended thinking' mode for deeper analysis. Optimized for high-volume applications, Sonnet 4 provides an optimal balance of capability and practicality, with pricing set at $3/$15 per million tokens (input/output). Access is readily available via the Anthropic API, Amazon Bedrock, and Google Cloud's Vertex AI.
What builders pair with Claude Sonnet 4
Projects using both technologies. Select a pairing to see a project.
12 more pairings
Pairing: Python
From 1,157 handwritten forms to one geological fact: a 25 m pile-driving limit
Pairing: FastAPI
The Prompt That Worked in Isolation and Died in Production: Eval-Driven Prompt Engineering for a Real-Time Interview Copilot
Pairing: Amazon Bedrock
AI for people who still print their email: how we put a 25-tool agent in front of 50-year-old accountants without a single hallucinated delete
Pairing: Claude Opus 4
JEN-R8 Discovery Engine: An AI That Tries to Prove Itself Wrong
Pairing: Next
How Personalized AI Outputs Turned Our Internal Tool Into a Product
Pairing: Qdrant
The Prompt That Worked in Isolation and Died in Production: Eval-Driven Prompt Engineering for a Real-Time Interview Copilot
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