11 min read
Claude Opus 5.5 Developer Guide: Pricing, API, Claude Code
Claude Opus 5.5 costs $4/$20 per million tokens with $0.20 cache reads. SDK examples, Claude Code setup, and when to pick it over Sonnet 5.5 or Haiku 5.5.
CLAUDE
107 articles - page 3 of 9
5 min read
Anthropic Cuts Fable 5 Biology Fallbacks by 85%: What the Safeguard Tuning Means for Developers
Anthropic retuned Claude Fable 5 biology safeguards, cutting biology fallbacks about 85%. What changed and what still routes to Opus 5.
7 min read
Beyond the Pelican Test: Opus 5 Renders the Lord of the Rings With a 1M-Token Budget
Karpathy gave Opus 5 one Lord of the Rings paragraph and a 1M-token budget for a three.js render. What the run shows about agentic work and self-verification.
11 min read
Budget AI Coding Models, October 2026: Haiku 5.5 vs GPT-6 Luna
Claude Haiku 5.5 and GPT-6 Luna both list at $0.10/$0.50 per MTok. The price tie breaks at Haiku's 100K cliff, and Anthropic's benchmarks favor Haiku. Checked Oct 8, 2026.
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7 min read
Claude Mythos Preview Explained: Anthropic's Gated Frontier Model and Project Glasswing
Claude Mythos Preview explained: Anthropic's gated frontier model, who got access through Project Glasswing, what it found, and where the model line went next.
10 min read
AI Model Routing Strategies for Cost-Effective Coding in 2026
AI model routing for cost-effective coding: pick Claude, GPT-5.6 or Kimi tiers by task complexity, cost and latency, with decision frameworks and code.
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11 min read
MCP vs Agent Skills: When to Use Which (and Why You Need Both)
MCP vs Agent Skills: MCP gives agents live access to tools and data, Skills give them packaged procedure. The decision rule for when to use which, or both.
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7 min read
Benchmarking Opus 5 on SlopCodeBench: AI Code Quality Under Iteration
Opus 5 on SlopCodeBench hit a 24% strict pass rate, beating Opus 4.8 and Sonnet 5, yet code quality still degraded. What it shows about coding agents over time.
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8 min read
Claude Mythos Found New Cryptographic Weaknesses: What HN Thinks
Claude Mythos Preview found new weaknesses in the HAWK post-quantum signature scheme and reduced-round AES. What the research shows and how HN reacted.
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8 min read
Six Weeks After the Bun Rust Rewrite: Is It Done Yet?
The Bun Rust rewrite six weeks on: 2,475 open bot PRs, no release tag and costs that may exceed $165K. The evidence, Jarred Sumner's reply and HN reactions.
12 min read
Claude Opus 5: Near-Fable Intelligence at Half the Cost
Claude Opus 5 benchmarks, pricing and HN reaction: near Fable 5 performance at the Opus 4.8 price, and what it means for choosing a daily-driver model.
22 min read
Claude Opus 5 vs Opus 4.8 vs Fable 5: Benchmark Comparison (July 2026)
Claude Opus 5 launched July 24, 2026 at $5/$25 per MTok - matching Opus 4.8 pricing while delivering near-Fable 5 intelligence. Full benchmark comparison across 7 evals, pricing breakdown, and decision guide.
Showing 25-36 of 106 articles
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