#anthropic articles

AVAnika Varsha Shekarneuralengram.hashnode.dev5d ago · 7 min read

Where cognition meets AI - teaching machines to remember what matters (Part 4)

"Think before you remember!" Part 3 covered the memory layer of NeuralEngram: working memory, episodic memory and the Ebbinghaus decay mechanism. A memory system, however, is only as effective as the

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RDRONI DASsystemdesignacademy.hashnode.dev6d ago · 21 min read

Claude Haiku 5.5: a tenth of the price up to 100,000 tokens, and what breaks when you switch

On 7 October 2026 Anthropic released Claude Haiku 5.5, its new small, fast model. For prompts up to 100,000 tokens it costs a tenth of Haiku 4.5 per token. Above that line, the price table gives five

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YYYong Yuyongboyu.hashnode.dev6d ago · 8 min read

Claude Haiku 5.5 Just Landed: Migrating a Haiku 4.5 Classifier Without the 400s (temperature, Prefill, Thinking Blocks)

Attributed compile + one small offline smoke testPrimary sources (Anthropic, 2026-10-07): Introducing Claude Haiku 5.5 (Anthropic); the Claude Platform docs What's new in Claude Haiku 5.5, Migration g

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AAAleksei Aleinikovalekseialeinikov.hashnode.devOct 8 · 19 min read

Claude Haiku 5.5 vs Sonnet 5.5 vs Opus 5.5: 20× Cheaper Than Sonnet — and a 100K-Token Price Cliff

Originally published on alekseialeinikov.com. TL;DR Claude Haiku 5.5 costs $0.10 per million input tokens and $0.50 per million output tokens for prompts up to 100,000 tokens. That is 1/20 of Sonnet

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EMEwan Makdeveloper.tenten.coOct 4 · 16 min read

Claude Sonnet 5.5 Rejects Forced Tool Calls, and Sonnet 4.5 Users Have Until November 30

Claude Sonnet 5.5 shipped on September 28, 2026 at an unchanged $2 input and $10 output per million tokens, and it returns 400 on five Sonnet 5 request patterns. Anthropic's launch announcement says t

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KKhaskykhasky.hashnode.devOct 3 · 3 min read

Fable Becomes the Advisor to Opus 5.5 in Claude Code

With Opus 5.5 as the main model in a Claude Code session, a Fable quota can still go to work without Fable taking over the session. The /advisor fable command connects Fable as an advisor that Opus co

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YYYong Yuyongboyu.hashnode.devOct 2 · 7 min read

Claude Code Mods Just Landed: First Hook, Blast Radius Guard, and Why They're Not Sandboxed

Attributed compile (not original research)Primary source: Getting started with Claude Code mods by Addy Osmani (claude.dev), published 2026-10-01Secondary roundup: Anthropic Launches Claude Code Mods,

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EMEwan Makdeveloper.tenten.coOct 1 · 12 min read

Claude Code Lets Fable 5.1 Advise Opus 5.5, but the Model Decides When to Ask

Claude Code's /advisor command puts Fable 5.1 on call while Opus 5.5 writes the code: the advisor reads the whole session, every tool call included, but Opus 5.5 decides when to ask. Anthropic's docum

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LLLucas Lewisapimodels.hashnode.devOct 1 · 6 min read

GPT-6.1 Sol or Claude Opus 5.5? A decision guide for agent builders, priced per task

If you are building an agent this month, you are probably choosing between OpenAI's GPT-6.1 Sol and Anthropic's Claude Opus 5.5. The useful finding from the published numbers is that neither model win

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YYYong Yuyongboyu.hashnode.devSep 30 · 7 min read

Claude Sonnet 5.5 Just Landed in Copilot: When to Use It, First Call, and Why List Price Lies

Attributed compile (not original research)Primary source: Introducing Claude Sonnet 5.5 (Anthropic), published 2026-09-28Copilot availability: Claude Sonnet 5.5 in GitHub Copilot (GitHub Changelog), p

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