topic · 2 notes
LLM Pricing, as it ships.
Engineering notes on LLM Pricing by Samir Sengupta - each one read from primary sources on the day it happened, with what it changes for people building on it.
Claude Opus 5.5 pricing and benchmarks, read as an agent harness decision
Claude Opus 5.5 shipped 22 September 2026 at $4/$20 per million tokens with $0.20 cache reads, 66.4% on Terminal-Bench 4.0 and a claimed 40% cost drop.
GPT-6 Astra code review cost evaluation: 4% more bugs at 2.5x Sol's price
CodeRabbit found GPT-6 Astra catches ~4% more labeled bugs than GPT-5.6 Sol overall and 20% more cross-file, at $10/$50 per 1M tokens versus Sol's $4/$20.
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