ϑbsidian
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Simple, usage-based pricing

Every plan includes a monthly allowance of usage to spend across all models and tools. You only pay for what you actually use, and every reply shows its cost.

Free
$0forever
$5 of usage / month

Try ϑbsidian, on us.

  • $5 of usage every month
  • Verify your email to unlock it (before that: 1 chat, 3 messages)
  • Claude Sonnet 5 and Sonnet 4.6
  • Files, web search, code, memory, themes and connected folders
  • Code sandbox with 1 GB of RAM
  • 10 AI images a month (create and edit)
Get started
Starter
$4/month
$20 of usage / month

For regular use.

  • $20 of usage every month
  • Everything in Free
  • Adds Claude Opus 5.5 and GPT-6 Sol
  • Code sandbox with 4 GB of RAM
  • 50 AI images a month
Most popular
Plus
$12/month
$70 of usage / month

For daily, heavy work.

  • $70 of usage every month
  • Everything in Starter
  • Adds Claude Fable 5.1 and GPT-6 Astra
  • Room for long agentic builds and research
  • 200 AI images a month
Ultra
$30/month
$200 of usage / month

Maximum headroom.

  • $200 of usage every month
  • Everything in Plus
  • Plenty of room for the top models at high effort
  • 600 AI images a month
Paid plans are coming soon — everyone is on the Free tier for now.