ByteDance: UI-TARS 7B vs PrismML: Ternary Bonsai 2 27B: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing ByteDance: UI-TARS 7B (bytedance/ui-tars-1.5-7b) vs PrismML: Ternary Bonsai 2 27B (prism-ml/ternary-bonsai-2-27b). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
ByteDance: UI-TARS 7B (bytedance/ui-tars-1.5-7b) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for ByteDance: UI-TARS 7B : Activate ephemeral prefix caching to slash input costs by 50% (down to $0.05/1M) or route via asynchronous Batch API for 50% off standard token rates.
PrismML: Ternary Bonsai 2 27B (prism-ml/ternary-bonsai-2-27b) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for PrismML: Ternary Bonsai 2 27B: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.0375/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing ByteDance: UI-TARS 7B (API ID: bytedance/ui-tars-1.5-7b) vs PrismML: Ternary Bonsai 2 27B (API ID: prism-ml/ternary-bonsai-2-27b), PrismML: Ternary Bonsai 2 27B offers lower standard input pricing at $0.075/1M tokens ($0.5/1M output), while PrismML: Ternary Bonsai 2 27B leads in cached prefix economics at $0.0375/1M tokens (50% discount). ByteDance: UI-TARS 7B achieves a 0ms faster P90 time-to-first-token latency (280ms vs 280ms).
Auto-discovered via live global telemetry registry.
Auto-discovered via live global telemetry registry.
| Specification / FinOps Dimension | ByteDance: UI-TARS 7B | PrismML: Ternary Bonsai 2 27B | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | bytedance/ui-tars-1.5-7b | prism-ml/ternary-bonsai-2-27b | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.1 / $0.2 | $0.075 / $0.5 | PrismML: Ternary Bonsai 2 27B |
| Cache Read Price (per 1M) | $0.05/1M (50% Off) | $0.0375/1M (50% Off) | PrismML: Ternary Bonsai 2 27B |
| Context Window / Max Output | 125K In / 2K Out | 256K In / 32K Out | PrismML: Ternary Bonsai 2 27B |
| P90 First-Token / Edge Latency | 280ms | 280ms | ByteDance: UI-TARS 7B (-0ms) |
UI-TARS-1.5 is a multimodal vision-language agent optimized for GUI-based environments, including desktop interfaces, web browsers, mobile systems, and games. Built by ByteDance, i
Bonsai 2 27B is a 27B-parameter reasoning model from PrismML derived from Qwen3.8-27B. It supports coding, mathematics, tool calling, and image understanding with a 262K-token cont
Real-Time Stack Cost & Hidden-Fee Simulator (MAU / Token / Egress / GMV)
Calibrated with Reddit r/FinOps & r/devops telemetry: Includes Context Caching, Bandwidth Egress, and MoR Tax
🛰️Switch from ByteDance: UI-TARS 7B to PrismML: Ternary Bonsai 2 27B
Bonsai 2 27B is a 27B-parameter reasoning model from PrismML derived from Qwen3.8-27B. It supports coding, mathematics, tool calling, and image understanding with a 262K-token cont Verified P90 latency of 280ms.