OpenAI APIPaid
The most capable AI models available via API — power your business automations with GPT-4.
AI / LLM comparison
OpenAI API vs Spellbook
Pricing, pros, cons, and ideal use cases — side by side.
SpellbookEnterprise
AI contract review and drafting that lives inside Microsoft Word, where lawyers already work.
At a glance
| OpenAI API | Spellbook | |
|---|---|---|
| Pricing | PaidPay-as-you-go. GPT-4o roughly $5/1M input tokens. Very affordable for SMB usage volumes. | EnterpriseNot published — 7-day free trial, then per-seat pricing quoted after a demo. Ask about Playbook setup, which is where the value concentrates. |
| Category | AI / LLM | AI / LLM |
| Ideal for | Any SMB wanting AI featuresLaw FirmsRecruitersAgencies | Small and mid-size law firms doing transactional workLean in-house legal teamsCorporate counsel handling high contract volumeFirms standardizing on drafting playbooks |
Pros & cons
OpenAI API
Pros
- Most capable models available
- Flexible API
- Good documentation
Cons
- Requires technical setup
- Costs can grow with volume
- Outputs need review
Spellbook
Pros
- Works inside Microsoft Word — near-zero workflow change
- Playbooks encode your standards so redlines stay consistent
- Compare benchmarks a deal against market comparables
- Cited answers rather than unsourced summaries
- Free trial available without a sales call
Cons
- No public pricing
- Transactional focus — weak fit for litigation practices
- Playbook quality determines output quality; setup is real work
- Not a legal research platform
Which should you choose?
OpenAI API is the lighter-weight option (Paid), while Spellbook sits higher on the pricing ladder (Enterprise). OpenAI API is built around any smb wanting ai features; Spellbook leans more toward small and mid-size law firms doing transactional work. Shortlist the one whose strengths line up with your biggest constraint.