Cost Optimization — Simon Carter

Anthropic makes Claude Sonnet 5's $2/$10 pricing permanent, cancels September price hike

Anthropic has confirmed the $2/$10 per million token rate for Claude Sonnet 5 is now permanent. The planned 50% increase from 1 September 2026 will not happen.

30 August 2026

Developer Tools & APIs

OpenAI cuts GPT-5.6 Luna pricing by 80% and frames it as the start of something bigger

OpenAI drops Luna API prices to $0.20/$1.20 per million tokens and trims Terra by 20%, calling it the beginning of an 'abundance flywheel' strategy.

1 August 2026

Developer Tools & APIs

Anthropic Claude API: Zero-Cost Refusals and a Smarter Advisor Tool for Agentic Pipelines

Anthropic now bills zero for API refusals with no output, and the advisor tool gets a max_tokens cap to control cost and latency in agentic workloads.

6 June 2026