LangFast
AutomatedOnline LLM playground for rapid prompt testing and evaluation. Run prompts across multiple AI models, compare responses side-by-side, and iterate with your own API keys.
Active plans
2
Total changes
4
Last change
Jun 25, 2026
Price trend
no history
What we know about LangFast’s pricing
Moderately activeChanges in 12 months
4
Cadence
Multiple changes per day
Direction
New plan recently added
Category position
Pricier than 72% of AI & ML tools (2268 compared)
Current pricing
1-Year Pass
one time$49
$49
- Access duration(12 months)
- Remove ads / popups
- 150+ AI models (BYOK)
- AI Playground & Chats
- Prompt management
- Prompt evaluations
- Variables & Templates
- Share links & Collaboration
- 1 GB Storage included
Lifetime Access
one time$60
$60
- Pay once, use forever
- No subscription, no hidden fees
- Free updates and access to new features
- 14-day money-back guarantee
- One-time payment
Price history
Last 4 changes
| Date | Plan | Change | Old | New | Δ% |
|---|---|---|---|---|---|
| Jun 25, 2026 | Lifetime Access | new plan | — | $60 | — |
| Jun 25, 2026 | 1-Year Pass | new plan | — | $49 | — |
| Jun 25, 2026 | Lifetime Access | new plan | — | $60 | — |
| Jun 25, 2026 | 1-Year Pass | new plan | — | $49 | — |
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