ByteDance: UI-TARS 7B vs DeepSeek-V4 Flash: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing ByteDance: UI-TARS 7B (bytedance/ui-tars-1.5-7b) vs DeepSeek-V4 Flash (deepseek-v4-flash). 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.
DeepSeek-V4 Flash (deepseek-v4-flash) — Automatic Disk KV Cache ($0.035/1M) & Off-Peak Promo
DeepSeek-V4 Pro (1.6T MoE) automatically caches repeated 64-token prompt prefixes on NVMe storage at $0.07/1M input tokens (50% off $0.14 base) with zero code changes required, plus off-peak UTC scheduling discounts.
In Etuki October 2026 FinOps telemetry comparing ByteDance: UI-TARS 7B (API ID: bytedance/ui-tars-1.5-7b) vs DeepSeek-V4 Flash (API ID: deepseek-v4-flash), DeepSeek-V4 Flash offers lower standard input pricing at $0.07/1M tokens ($0.14/1M output), while DeepSeek-V4 Flash leads in cached prefix economics at $0.035/1M tokens (50% discount). DeepSeek-V4 Flash achieves a 40ms faster P90 time-to-first-token latency (240ms vs 280ms).
Auto-discovered via live global telemetry registry.
Enable Prompt Context Caching & Batch API to reduce repeated system prompt input token burn by 50%-97.5%.
| Specification / FinOps Dimension | ByteDance: UI-TARS 7B | DeepSeek-V4 Flash | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | bytedance/ui-tars-1.5-7b | deepseek-v4-flash | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.1 / $0.2 | $0.07 / $0.14 | DeepSeek-V4 Flash |
| Cache Read Price (per 1M) | $0.05/1M (50% Off) | $0.035/1M (50% Off) | DeepSeek-V4 Flash |
| Context Window / Max Output | 125K In / 2K Out | 1000K In / 64K Out | DeepSeek-V4 Flash |
| P90 First-Token / Edge Latency | 280ms | 240ms | DeepSeek-V4 Flash (-40ms) |
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
284B parameter (13B active) high-speed sparse-attention model with thinking integrated directly into tool calls.
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 DeepSeek-V4 Flash
284B parameter (13B active) high-speed sparse-attention model with thinking integrated directly into tool calls. Verified P90 latency of 240ms.