Brief, mostly signal

Shattered says GPT-6 Astra costs 100 times more per message than Luna

The comparison also says Claude 5.5 and GPT-6 repriced in September and October 2026. The pricing figures are the piece's own comparison.

Read the source at shattered.io

What the research found

Shattered comparison says GPT-6 Astra costs 100x Luna per message, and that Claude 5.5 and GPT-6 repricing happened in Sept to Oct 2026; overlaps heavily with #2249, so treat as one story with pricing as the unique angle.

Claims and how well the evidence supports them

Claude Opus 5.5, Sonnet 5.5 and Haiku 5.5 released between Sep 22 and Oct 7, 2026 99%
GPT-6 Astra costs 100x more per message in credits than GPT-6 Luna 98%
OpenAI repriced GPT-6 Sol and Luna on Oct 21, 2026 99%

Evidence

shattered.io https://shattered.io/claude-vs-chatgpt-for-coding-astra-100x-2026

Actionability rated medium.