Claude Haiku 5.5

Everything Fervor AI has published that touches Claude Haiku 5.5 — 2 pieces, newest first.

• Claude Haiku 5.5 Is a Migration, Not a Model Swap

  Claude Haiku 5.5 lists at a tenth of Haiku 4.5's price for prompts under 100K tokens, but a straight model-ID swap breaks on sampling parameters, prefill, thinking…

• Briefing · October 7, 2026 · afternoon

  On October 7 Anthropic priced its new small model about 90 percent below Haiku 4.5 for prompts under 100K tokens and OpenAI wrapped GPT-6 in a UI compiler, while…