Fetching from the wire…
01
02
03
04
05
06
07
08
Public story · 2026-03-19 · source-backed
Anthropic confirmed general availability of 1M context for Opus 4.6 and Sonnet 4.6 at standard pricing — a 900K-token request billed at the same rate as 9K. Opus scores 78.3% on MRCR v2 (highest among frontier models at that length). Media handling expanded 6x to 600 images or pages per request. Claude CoWork also received the upgrade. Anthropic
Each link below shares sources, entities, or timing with this story.
The extension takes autonomous actions (reading, clicking, form-filling) without per-action approval, gated by a safety classifier validating each action plus probes scanning page content for injection attempts. Anthropic publishes per-model attack success rates with safeguard...
Anthropic moved the 1M token context window to general availability for Opus 4.6 and Sonnet 4.6 at standard pricing. Auto-activates for requests over 200K tokens. Media limit increased from 100 to 600 images/PDFs per request. The new thinking.display: 'omitted' flag for stream...
Anthropic commissioned the independent evaluator to test 72 injection scenarios, held out from Anthropic, each run 10 times against Fable 5, Opus 5, and Sonnet 5 as of July 17. Clean sweep. TechCrunch has the details. A third-party held-out eval is a much stronger claim than i...
Every conversation I've had about AI costs in the last six months eventually lands on the same tension: you want the smartest model for the hard decisions, but you can't afford to run it on every token. Anthropic just gave that tension a formal solution. The advisor tool, now...
Anthropic moved Opus 4.6 and Sonnet 4.6's 1M token context to GA with flat pricing across the entire window. OpenAI charges premium above 272K tokens; Google above 200K. This is the most practically significant pricing change for large-codebase and long-session agent workflows...
For two years the technique was accumulation. Longer system prompts, longer CLAUDE.md, more numbered do/don't lists, more "always verify your work" imperatives. Anthropic's context-engineering guidance for Claude 5 models inverts it, with an 80% deletion figure attached. The s...
MindPattern daily
One email a day at 7 AM. Sources and a take on every story. Unsubscribe anytime.