Welcome to our inaugural Developer Newsletter. Every few weeks, we'll share product updates, resources, and news for Anthropic developers.

Product updates

Claude Sonnet 3.5

Claude Sonnet 3.5, our latest release, outperforms competitor models and Claude Opus 3 across a variety of evaluations while maintaining the speed and cost of our previous mid-tier model. Try it in the Claude Console Workbench or explore our API docs.

View blog

Extended outputs for Claude Sonnet 3.5

We've doubled the max output token limit for Claude Sonnet 3.5 from 4096 to 8192 in the API. To extend outputs, add this header to your calls: "anthropic-beta": "max-tokens-3-5-sonnet-2024-07-15".

Workbench enhancements

New features in the Claude Console Workbench:

1. Prompt generator: Describe your task (e.g. "Triage inbound customer support requests") and have Claude generate a high-quality prompt for you.
2. Evaluate mode: Compare the outputs of two or more prompts side by side and rate Claude's outputs on a 5-point scale.

Read our blog post

Usage and cost dashboards

Track API usage and billing by dollar amount, token count, and API keys in the new Usage and Cost tabs in the Developer Console.

Release notes

We've added comprehensive release notes to our docs, covering updates across our API, Claude Console, and Claude apps.

Developer Resources

Revamped Anthropic Docs

Our overhauled docs now include a prompt optimization guide and Claude-powered search.

New educational courses

Two free, self-serve courses available now:

1. Claude API fundamentals: Master the basics of our API and SDKs.
2. Tool use with Claude: Learn to connect Claude with external client-side tools and generate structured JSON outputs.

Expanding Claude Cookbook

New guides on core Claude skills: citations, retrieval augmented generation, and classification.