Answer · Legal
What AI models does Spellbook use?
Spellbook runs on GPT5 (OpenAI) and Opus (Anthropic), and routes requests between them.
- Models used
- 2
- Primary model
- GPT5
- Public API
- Not published
- Last checked
- 2026-09-11
Model claims are labelled by how we know them: GPT5 — disclosed and Opus — disclosed. "Disclosed" means the vendor says so in public; "inferred" means it was derived from documentation, headers or release notes.
Context window: Not published.
Other stack signals: Microsoft Word Add-in.
Cite this answer
Tomorrow. “What AI models does Spellbook use?” Tomorrow AI & Emerging Tech Index, AlienSquad, updated 2026-09-11. https://tomorrow.aliensquad.ai/q/what-models-does-spellbook-use
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