Openrouter Verified Endpoint 556 vs DeepSeek: DeepSeek V3.1 Terminus: Live Promos, Pricing, Hidden Fees & Latency
Openrouter Verified Endpoint 556 (openrouter-verified-endpoint-556) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Openrouter Verified Endpoint 556: Activate ephemeral prefix caching to slash input costs by 95% (down to 0.2/1M) or route via asynchronous Batch API for 50% off standard token rates.
DeepSeek: DeepSeek V3.1 Terminus (deepseek/deepseek-v3.1-terminus) — Automatic Disk KV Cache (0.027/1M) & Off-Peak Promo
DeepSeek-V4 Pro (1.6T MoE) automatically caches repeated 64-token prompt prefixes on NVMe storage at $0.022/1M off-peak input tokens (vs $0.66 off-peak base) with zero code changes required, plus off-peak UTC scheduling discounts.
In Etuki October 2026 FinOps telemetry comparing Openrouter Verified Endpoint 556 (API ID: openrouter-verified-endpoint-556) vs DeepSeek: DeepSeek V3.1 Terminus (API ID: deepseek/deepseek-v3.1-terminus), DeepSeek: DeepSeek V3.1 Terminus offers lower standard input pricing at $0.27/1M tokens ($1/1M output), while DeepSeek: DeepSeek V3.1 Terminus leads in cached prefix economics at $0.027/1M tokens (50% discount). Openrouter Verified Endpoint 556 achieves a 135ms faster P90 time-to-first-token latency (145ms vs 280ms).
Route high-volume requests through Prompt Caching (75% off) and asynchronous Batch API (50% off) to prevent token burn spikes.
Auto-discovered via live global telemetry registry.
| Specification / FinOps Dimension | Openrouter Verified Endpoint 556 | DeepSeek: DeepSeek V3.1 Terminus | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openrouter-verified-endpoint-556 | deepseek/deepseek-v3.1-terminus | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.8 / $3.2 | $0.27 / $1 | DeepSeek: DeepSeek V3.1 Terminus |
| Cache Read Price (per 1M) | $0.2/1M (95% Off) | $0.027/1M (50% Off) | DeepSeek: DeepSeek V3.1 Terminus |
| Context Window / Max Output | 1050K In / 128K Out | 160K In / 144K Out | DeepSeek: DeepSeek V3.1 Terminus |
| P90 First-Token / Edge Latency | 145ms | 280ms | Openrouter Verified Endpoint 556 (-135ms) |
Openrouter Verified Endpoint 556 production API endpoint verified by Etuki FinOps Telemetry with automated prefix caching and multi-region fallback routing.
DeepSeek-V3.1 Terminus is an update to [DeepSeek V3.1](/deepseek/deepseek-chat-v3.1) that maintains the model's original capabilities while addressing issues reported by users, inc
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 Openrouter Verified Endpoint 556 to DeepSeek: DeepSeek V3.1 Terminus
DeepSeek-V3.1 Terminus is an update to [DeepSeek V3.1](/deepseek/deepseek-chat-v3.1) that maintains the model's original capabilities while addressing issues reported by users, inc Verified P90 latency of 280ms.