Pricing
Updated on May 23, 2026
Overview
We charge by tier. Each tier has its own limits on chat requests, message length, projects, files, web search, and image credits. Chat usage is tracked in weighted request units: model cost, input length, retrieved reads, and Canvas/tool context can raise what a turn consumes. Chat-length limits still count user messages only.
Premium credits let you use any model regardless of tier limits while your balance lasts.
How longer chats cost more
| Chat billing | How it works |
|---|---|
| User send | Counts as 1 request |
| Assistant reply | Does not count as another chat-length message |
Explorer
Explorer limits
| Price | $0 |
| Base requests | 20 per day |
| Premium models | No |
| Messages per chat | 20 user messages |
| Characters per message | 1,250 |
| Concurrent chats | 5 |
| Projects | 1 |
| Imported chats | 0 |
| Web search | — |
| Image credits | — |
| Files per project | — |
| Max file size | — |
| Just4o.chat File Storage Space | — |
Builder
Builder limits
| Price | $3/month |
| Premium requests | 100 per month |
| Base requests | 1,000 per month |
| Messages per chat | 200 user messages |
| Characters per message | 5,000 |
| Concurrent chats | 50 |
| Projects | 5 |
| Imported chats | 0 |
| Web search | 5 per day |
| Image credits | 10 per month |
| Files per project | 5 (2 MB each) |
| Just4o.chat File Storage Space | 10 MB |
| Premium+ models | Not included |
Studio
Studio limits
| Price | $15/month |
| Premium requests | 500 per month |
| Base requests | 2,500 per month |
| Messages per chat | 500 user messages |
| Characters per message | 7,500 |
| Concurrent chats | 200 |
| Projects | 10 |
| Imported chats | 0 |
| Web search | 10 per day |
| Image credits | 25 per month |
| Files per project | 10 (10 MB each) |
| Just4o.chat File Storage Space | 500 MB |
| Premium+ models | Echo, Grok 4.20 Reasoning, Claude Opus 4.5, Sonnet 4.5, Sonnet 4.6, Gemini 2.5 Pro, Gemini 3 Pro |
Aurora
Aurora limits
| Price | $25/month |
| Premium requests | 1,250 per month |
| Base requests | 5,000 per month |
| Messages per chat | Unlimited |
| Characters per message | 15,000 |
| Concurrent chats | Unlimited |
| Projects | 25 |
| Imported chats | Up to 100 |
| Web search | 25 per day |
| Image credits | 50 per month |
| Files per project | 10 (15 MB each) |
| Just4o.chat File Storage Space | 750 MB |
| Persona context | 500,000 characters |
Pro
Pro limits
| Price | Contact us |
| Premium requests | 4,000 per month |
| Base requests | 20,000 per month |
| Messages per chat | Unlimited |
| Characters per message | 15,000 |
| Concurrent chats | Unlimited |
| Projects | 100 |
| Imported chats | Up to 100 |
| Web search | 50 per day |
| Image credits | 100 per month |
| Files per project | 10 (15 MB each) |
| Just4o.chat File Storage Space | 3 GB |
| Persona context | 500,000 characters |
| Support | Priority |