System One Models by TypeSafe AI
TypeSafe AI releases · 1 in the last 12 monthsChangelog →
1 model2026Up to 64K ctxFrom $0.042/1M input
Last refreshed 2026-09-20. Next refresh: weekly.
Details
ResearcherTypeSafe AI
LicenseProprietary
Commercial useCommercial use: conditional
Models1
Released2026
Max context64K
Capabilities
Structured OutputsAll models
Links
WebsiteAbout
System One is TypeSafe AI's model family for machine-native automation: parallel structured outputs and calibrated probabilistic decisions instead of autoregressive string generation. Jev is the first System One model, released September 15, 2026 in early access.
Decision facts
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
1 in view
JevCurrent
Use when the workload needs 64K context, structured outputs, and agents.
2026-0964K contextstructured outputsagents
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| Jev | Use when the workload needs 64K context, structured outputs, and agents. | 2026-09 | 64K contextstructured outputsagents | Current |
Release Timeline
1 release group2026-09
1 current
Jev
Current64K contextstructured outputsagents
Specifications(1 models)
| Model | Released | Context | Structured Outputs |
|---|---|---|---|
| Jev | 2026-09 | 64K | Yes |
Available From(1 provider)
Pricing
| Model | Provider | Input / 1M | Output / 1M | Type |
|---|---|---|---|---|
| Jev | TypeSafe AI | $0.042 | — | Serverless |