Uploaded September 2026 | Updated September 2026, 3 hours ago
Anthropic launched Claude Opus 5.5 on Sep 22, 2026. Standard API pricing is $4 per million input tokens and $20 per million output tokens, 20% below Opus 5. Cached context reads cost $0.20 per million tokens.
Speed, cost and test figures are Anthropic’s own announcement and internal tests, not independent benchmarks. Prices in USD.
Anthropic launched Claude Opus 5.5 on Sep 22, 2026. Standard API pricing is $4 per million input tokens and $20 per million output tokens, 20% below Opus 5. Cached context reads cost $0.20 per million tokens.
Speed, cost and test figures are Anthropic’s own announcement and internal tests, not independent benchmarks. Prices in USD.
![[SUPERSEDED DRAFT] Claude Project Memory: 3 Simple Layers](https://i.ytimg.com/vi/aCQWlJSCtts/mqdefault.jpg "[SUPERSEDED DRAFT] Claude Project Memory: 3 Simple Layers
Anthropic describes different levels in how Claude thinks. That prompted a practical project-memory analogy: give scratch work, current project decisions, and stable core rules separate layers—and always back up before cleanup.
This layered-memory workflow is my analogy and recommendation, not an Anthropic research claim.
Original Anthropic video: https://www.youtube.com/watch?v=rKV5JcALQoQ
The workflow:
0. Back up
1. Scratch: todays temporary work
2. Project: current decisions and open tasks
3. Core: stable rules and architecture
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