Claude Opus 5.5: Fable-Level Performance at 40% Lower Cost
Claude Opus 5.5 opens the Anthropic 5.5 family: Fable 5.1-level performance at 40% lower running cost, $4/$20 per million tokens, and 30% faster output than Opus 5.
API pricing
OpenAI's GPT-6 Sol and Luna: Half the API Price, Fewer Mistakes
OpenAI's GPT-6 Sol and Luna cut API prices to half of the 5.6 series and halve mistakes in internal tests. Here is what each model does and when you get it in ChatGPT.
GLM 5.2 by Z.ai (2026): Official Pricing, Coding Workloads, and Access Options
Official GLM-5.2 pricing ($1.4/$4.4), 1M context, Coding Plan credits, OpenCode pairing, and honest limits for coding teams.
Sakana Fugu Ultra vs Claude Fable 5 & Mythos: Full 2026 Comparison
The headline writes itself: a Japanese startup releases an AI that "matches Claude Fable 5" without owning a frontier model. The reality is more nuanced, and for anyone deciding…