System One Model
#13 in Reasoning-ModelleTypesafe Ai · 2× · tolest 20. Sept. 2026
36
Momentum
Jev is TypeSafe AI's first "System One Model," a new model class for fast, structured software decisions instead of text generation. Rather than generating text Token-for-Token, Jev returns typed, calibrated responses with probabilities (Choice, Score, Noul) in a single parallel pass. The model was released in Early Access on September 15, 2026, is proprietary, currently accepts text only, and is offered via API (POST /v1/systemone) as well as various third-party gateways.
Momentum-Verloop
22.06.20.09.
Features
| Key Benchmark (%) | ~68% accuracy on TypeSafe's own 4-workflow benchmark (vendor-reported, not independently verified) |
| Context Window (Tokens) | 64,000 tokens per request (32,000 for state + longest question) |
| License | Proprietary, hosted model |
| Multimodality | Text only (strings, JSON, text arrays); images, audio, video not supported |
| Platform | API (POST /v1/systemone), client SDKs (Python, JS); also available via OpenRouter, Cloudflare AI, Requesty, Impossibl |
| Price per 1M Tokens | $0.042 per 1M input tokens; output tokens free |
| Release Date | September 15, 2026 (early access) |