DeepSeek-V4 Flash vs Upstage: Solar Mini 4: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing DeepSeek-V4 Flash (deepseek-v4-flash) vs Upstage: Solar Mini 4 (upstage/solar-mini4). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
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.
Upstage: Solar Mini 4 (upstage/solar-mini4) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Upstage: Solar Mini 4: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.025/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing DeepSeek-V4 Flash (API ID: deepseek-v4-flash) vs Upstage: Solar Mini 4 (API ID: upstage/solar-mini4), Upstage: Solar Mini 4 offers lower standard input pricing at $0.05/1M tokens ($0.2/1M output), while Upstage: Solar Mini 4 leads in cached prefix economics at $0.025/1M tokens (50% discount). DeepSeek-V4 Flash achieves a 40ms faster P90 time-to-first-token latency (240ms vs 280ms).
Enable Prompt Context Caching & Batch API to reduce repeated system prompt input token burn by 50%-97.5%.
Auto-discovered via live global telemetry registry.
| Specification / FinOps Dimension | DeepSeek-V4 Flash | Upstage: Solar Mini 4 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | deepseek-v4-flash | upstage/solar-mini4 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.07 / $0.14 | $0.05 / $0.2 | Upstage: Solar Mini 4 |
| Cache Read Price (per 1M) | $0.035/1M (50% Off) | $0.025/1M (50% Off) | Upstage: Solar Mini 4 |
| Context Window / Max Output | 1000K In / 64K Out | 512K In / 128K Out | Upstage: Solar Mini 4 |
| P90 First-Token / Edge Latency | 240ms | 280ms | DeepSeek-V4 Flash (-40ms) |
284B parameter (13B active) high-speed sparse-attention model with thinking integrated directly into tool calls.
Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window. It is built for agentic us
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 DeepSeek-V4 Flash to Upstage: Solar Mini 4
Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window. It is built for agentic us Verified P90 latency of 280ms.