DeepSeek V4.1 Flash 1017 vs GPT-5.6 Terra: Live Promos, Pricing, Hidden Fees & Latency
DeepSeek V4.1 Flash 1017 (deepseek-v4.1-flash-1017) — Automatic Disk KV Cache (0.006/1M) & 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.
GPT-5.6 Terra (gpt-5.6-terra) Startup Credits & Batch API 50% Off Promo
OpenAI GPT-6.1 Sol ($2/$10 base rate) qualifies for immediate 75% automatic prefix caching ($0.50/1M), 50% off 24-hour Batch API completions ($1/$5), and up to $150,000 in OpenAI/Azure Foundry credits via Microsoft for Startups Founders Hub (no VC funding required for initial tiers).
In Etuki October 2026 FinOps telemetry comparing DeepSeek V4.1 Flash 1017 (API ID: deepseek-v4.1-flash-1017) vs GPT-5.6 Terra (API ID: gpt-5.6-terra), DeepSeek V4.1 Flash 1017 offers lower standard input pricing at $0.07/1M tokens ($0.14/1M output), while DeepSeek V4.1 Flash 1017 leads in cached prefix economics at $0.006/1M tokens (75% discount). DeepSeek V4.1 Flash 1017 achieves a 0ms faster P90 time-to-first-token latency (270ms vs 270ms).
Official token rate is $0.07/$0.14 with $0.006/1M disk-KV cache hit. Built-in Search & Fetch API calls are billed separately at $0.75 per 1,000 requests.
GPT-5.6 Terra charges $12/1M output ($2 more than GPT-6.1 Sol) and $0.20/1M cache read (2x more than GPT-6.1 Sol). Migrate to gpt-6.1-sol immediately.
| Specification / FinOps Dimension | DeepSeek V4.1 Flash 1017 | GPT-5.6 Terra | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | deepseek-v4.1-flash-1017 | gpt-5.6-terra | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.07 / $0.14 | $2 / $12 | DeepSeek V4.1 Flash 1017 |
| Cache Read Price (per 1M) | $0.006/1M (75% Off) | $0.2/1M (75% Off) | DeepSeek V4.1 Flash 1017 |
| Context Window / Max Output | 1000K In / 128K Out | 1000K In / 128K Out | DeepSeek V4.1 Flash 1017 |
| P90 First-Token / Edge Latency | 270ms | 270ms | DeepSeek V4.1 Flash 1017 (-0ms) |
DeepSeek Oct 17, 2026 Pareto coding update ("Wish-Driven Programming"): 77.0% on DeepSWE v1.1, 60.5% Automation-Bench, $0.07/$0.14 ($0.006 Cache Hit) + Search/Fetch API ($0.75/1K).
OpenAI July 2026 generation model ($2.00/$12.00 per 1M, Cache $0.20/1M). Superseded by GPT-6.1 Sol ($2/$10, Cache $0.10).
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 V4.1 Flash 1017 to GPT-5.6 Terra
OpenAI July 2026 generation model ($2.00/$12.00 per 1M, Cache $0.20/1M). Superseded by GPT-6.1 Sol ($2/$10, Cache $0.10). Verified P90 latency of 270ms.