GuidesGuide
Claude not working? Check status first, then fix the error
Anthropic's help center ties each Claude error to a fix: usage limits, login errors, capacity messages and network problems, plus what to do on iPhone.
Puzzle strategy
Every ClaudeGPT Si story about Puzzle strategy, newest first: news, analysis, reviews and guides.
No Puzzle strategy stories yet
New stories appear here as soon as they are published. Until then, here is the latest from the newsroom.
Read the latest AI newsLatest from ClaudeGPT Si
AI ModelsExplainer
Claude Opus 5.5 pricing: $4 input, $20 output per million tokens
Opus 5.5 costs 20% less per token than Opus 5, and Anthropic says typical jobs cost 40% less to run. Here are the numbers as of October 28, 2026.
AppsExplainer
Is Midjourney free? No, plans start at $10 a month
Midjourney's help center says there is no free trial on Discord or the website. Basic costs $10 a month, and only the niji · journey app offers a limited trial.
ResearchExplainer
Artificial Analysis Intelligence Index: what it measures in v5
The index averages nine tests in four equal categories, and 60% of it rests on private data. Its own pages list what it cannot tell you.
ReviewsComparison
ChatGPT vs Grok: prices, plans and benchmarks compared
Both start free and have an $8 plan. Above that, ChatGPT Pro runs $100 to $500 a month and Grok Super and Ultra cost $100 and $200.
AppsExplainer
Is Genie 4 free? Not yet: waitlist now, Ultra plans from $99.99
DeepMind's Genie 4 is a research preview with a waitlist and no published price. The route to it runs through Google AI Ultra, which starts at $99.99 a month.