Product

Claude Sonnet

7 articles First covered Apr 24, 2026, latest Sep 3, 2026

Anthropic's launch card for Claude Fable 5.1 and Claude Mythos 5.1, white serif text over a pale blue sky with clouds and a daytime moon.

Six Claude 5 models in twelve weeks. Fable 5.1 is the first to watermark its output.

Anthropic's Fable 5.1 doubles a science benchmark and cuts cache reads 75%. Independent tests measured tasks costing up to 3x more than Fable 5.

Anthropic's illustrated Claude Code card: a browser window drawn in black ink inside curly braces on a burnt-orange background

AI·last month

Humans caught 13.6% of dangerous commands. Claude Code's classifier caught 89%.

Anthropic makes auto mode the default in Claude Code on August 14. Its own study says the permission prompt was catching almost nothing.

Anthropic's Claude Opus 5 announcement artwork: a large numeral 5 formed from an arrangement of vintage speckled bird-egg illustrations on a cream background.

AI·2 months ago

Claude Opus 5 nears Fable 5's frontier intelligence at half the price

Anthropic shipped Claude Opus 5 at the same $5/$25 per million tokens as Opus 4.8. It nears Fable 5's intelligence at half the cost, with new effort and fallback controls.

Stylized GitHub Copilot mascot melting into glowing puddles in front of a wall of flames — a visual metaphor for the steep multiplier hike on annual plans.

AI·4 months ago

GitHub Copilot's Claude Opus multiplier jumps to 27x on June 1. Monthly plans dodge the hike.

GitHub's new model multiplier table for Copilot Pro and Pro+ annual plans lands June 1. Opus 4.6 goes 3 to 27. Sonnet 4.6 goes 1 to 9.

Title card for Boris Cherny's 'Mastering Claude Code in 30 Minutes' Anthropic workshop talk.

AI·4 months ago

Anthropic just dropped its Claude Code workshop tapes. The playbook is better than the marketing.

Boris Cherny on Claude Code, Applied AI on prompting, Erik Schluntz on vibe coding in prod. Three Code with Claude tapes hit YouTube ahead of the 2026 conference.

DeepSeek social card from the V4 API documentation release post.

AI·5 months ago

DeepSeek V4 lands: 1.6T-param open MoE, 1M-token context, and SWE-bench within 0.2 of Opus 4.6

DeepSeek shipped V4-Pro and V4-Flash under MIT on April 24. V4-Pro hits 80.6% on SWE-bench Verified. V4-Flash is $0.14 in / $0.28 out.

Anthropic Engineering postmortem cover image.

AI·5 months ago

Anthropic admits three Claude Code bugs quietly tanked quality for six weeks

Anthropic's April 23 postmortem names three bugs that degraded Claude Code between March 4 and April 20. Usage limits are being reset for every subscriber.