Writer: Palmyra X5 vs Z.ai: GLM 5.1: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Writer: Palmyra X5 (writer/palmyra-x5) vs Z.ai: GLM 5.1 (z-ai/glm-5.1). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Writer: Palmyra X5 (writer/palmyra-x5) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Writer: Palmyra X5: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.3/1M) or route via asynchronous Batch API for 50% off standard token rates.
Z.ai: GLM 5.1 (z-ai/glm-5.1) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Z.ai: GLM 5.1: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.483/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing Writer: Palmyra X5 (API ID: writer/palmyra-x5) vs Z.ai: GLM 5.1 (API ID: z-ai/glm-5.1), Writer: Palmyra X5 offers lower standard input pricing at $0.6/1M tokens ($6/1M output), while Writer: Palmyra X5 leads in cached prefix economics at $0.3/1M tokens (50% discount). Writer: Palmyra X5 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 | Writer: Palmyra X5 | Z.ai: GLM 5.1 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | writer/palmyra-x5 | z-ai/glm-5.1 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.6 / $6 | $0.966 / $3.036 | Writer: Palmyra X5 |
| Cache Read Price (per 1M) | $0.3/1M (50% Off) | $0.483/1M (50% Off) | Writer: Palmyra X5 |
| Context Window / Max Output | 1016K In / 8K Out | 200K In / 125K Out | Z.ai: GLM 5.1 |
| P90 First-Token / Edge Latency | 280ms | 280ms | Writer: Palmyra X5 (-0ms) |
Palmyra X5 is Writer's most advanced model, purpose-built for building and scaling AI agents across the enterprise. It delivers industry-leading speed and efficiency on context win
GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks. Unlike previous models built around minute-level interaction
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 Writer: Palmyra X5 to Z.ai: GLM 5.1
GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks. Unlike previous models built around minute-level interaction Verified P90 latency of 280ms.