Every frontier model.One conversation.
GPT drafts, Claude reasons, Gemini checks — in the same thread, on one credit meter, with memory that carries between conversations.
Pulling the plan from memory — you drafted it on June 2.
Retention held at 94.2% against the 91% target. The gap is entirely the annual-plan cohort
Pulling the plan from memory — you drafted it on June 2.
Retention held at 94.2% against the 91% target. The gap is entirely the annual-plan cohort
→ 20+ models · one meter · memory that carries
/manifesto
why one thread
/how-it-works
01ask
One composer. Twenty-plus models.
Type once and pick the brain that fits — or let auto-route decide. Switching models mid-thread keeps the whole conversation, not just the last message.
02route
Credits reserved before a token moves.
Every request places a concurrent-safe hold on your balance, routes to the live provider, and arms a fallback chain. No surprise bills, no dropped turns.
$ reserve --hold 12cr
→ balance verified · concurrent-safe hold
$ route --model claude-sonnet
→ provider live · fallback chain armed
→ unused credits refund on commit
03stream
Answers land as they're generated.
Tokens stream in real time with tool calls and reasoning rendered live. When the turn commits, unused credits go straight back to your balance.
Here's the skeptic's read on your draft:
1. The subject line promises more than the body delivers.
2. Your CTA competes with itself — pick one
04remember
The thread folds into memory.
What mattered — your preferences, your project, your voice — is saved, scoped, and injected into every future conversation. Deletable any time.
saved to memory
carries into every new thread · deletable any time
/features
Built to be lived in.
01 / byok
Bring your own keys
Plug in your OpenAI, Anthropic, or Google keys and Synapse routes straight through them — your credit meter stops while your keys do the work.
$ keys add anthropic sk-ant-…
→ verified · routing direct
→ credit meter: idle
02 / memory
Memory that compounds
Preferences, projects, and decisions fold into every future thread. The longer you use Synapse, the less you have to explain.
03 / projects
Projects keep threads together
Group conversations by what you're building. Context, files, and memory scope to the project — not scattered across a hundred tabs.
▸ q3-retention · 14 threads
▸ launch-email · 6 threads
▸ side-project · 22 threads
04 / sharing
Share a thread in one click
Publish any conversation as a read-only page — revocable, no account needed to view, never indexed without your say.
frontier models, one thread
credit meter across all of them
context lost between conversations
/trust
“One meter for every model. We stopped guessing what the bill would be.”
“Memory that actually carries between chats. It feels like the AI knows us.”
“Research with real citations. I verify in one click instead of re-searching.”
credentials never touch chat · BYOK keys encrypted at rest · memory deletable any time
free tier · no card · two minutes to your first thread