Qwen: Qwen3.5-9B vs ByteDance Seed: Seed 1.6 Flash: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Qwen: Qwen3.5-9B (qwen/qwen3.5-9b) vs ByteDance Seed: Seed 1.6 Flash (bytedance-seed/seed-1.6-flash). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Qwen: Qwen3.5-9B (qwen/qwen3.5-9b) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Qwen: Qwen3.5-9B: 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.
ByteDance Seed: Seed 1.6 Flash (bytedance-seed/seed-1.6-flash) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for ByteDance Seed: Seed 1.6 Flash: 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 Qwen: Qwen3.5-9B (API ID: qwen/qwen3.5-9b) vs ByteDance Seed: Seed 1.6 Flash (API ID: bytedance-seed/seed-1.6-flash), ByteDance Seed: Seed 1.6 Flash offers lower standard input pricing at $0.075/1M tokens ($0.3/1M output), while ByteDance Seed: Seed 1.6 Flash leads in cached prefix economics at $0.0375/1M tokens (50% discount). Qwen: Qwen3.5-9B 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 | Qwen: Qwen3.5-9B | ByteDance Seed: Seed 1.6 Flash | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | qwen/qwen3.5-9b | bytedance-seed/seed-1.6-flash | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.1 / $0.15 | $0.075 / $0.3 | ByteDance Seed: Seed 1.6 Flash |
| Cache Read Price (per 1M) | $0.05/1M (50% Off) | $0.0375/1M (50% Off) | ByteDance Seed: Seed 1.6 Flash |
| Context Window / Max Output | 256K In / 32K Out | 256K In / 32K Out | Qwen: Qwen3.5-9B |
| P90 First-Token / Edge Latency | 280ms | 280ms | Qwen: Qwen3.5-9B (-0ms) |
Qwen3.5-9B is a multimodal foundation model from the Qwen3.5 family, designed to deliver strong reasoning, coding, and visual understanding in an efficient 9B-parameter architectur
Seed 1.6 Flash is an ultra-fast multimodal deep thinking model by ByteDance Seed, supporting both text and visual understanding. It features a 256k context window and can generate
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 Qwen: Qwen3.5-9B to ByteDance Seed: Seed 1.6 Flash
Seed 1.6 Flash is an ultra-fast multimodal deep thinking model by ByteDance Seed, supporting both text and visual understanding. It features a 256k context window and can generate Verified P90 latency of 280ms.