Z.ai: GLM 5.2 vs OpenAI: GPT-6 Luna (batch): Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Z.ai: GLM 5.2 (z-ai/glm-5.2) vs OpenAI: GPT-6 Luna (batch) (openai/gpt-6-luna:batch). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Z.ai: GLM 5.2 (z-ai/glm-5.2) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Z.ai: GLM 5.2: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.03/1M) or route via asynchronous Batch API for 50% off standard token rates.
OpenAI: GPT-6 Luna (batch) (openai/gpt-6-luna:batch) 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 Z.ai: GLM 5.2 (API ID: z-ai/glm-5.2) vs OpenAI: GPT-6 Luna (batch) (API ID: openai/gpt-6-luna:batch), OpenAI: GPT-6 Luna (batch) offers lower standard input pricing at $0.05/1M tokens ($0.25/1M output), while OpenAI: GPT-6 Luna (batch) leads in cached prefix economics at $0.025/1M tokens (50% discount). Z.ai: GLM 5.2 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 | Z.ai: GLM 5.2 | OpenAI: GPT-6 Luna (batch) | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | z-ai/glm-5.2 | openai/gpt-6-luna:batch | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.06 / $7 | $0.05 / $0.25 | OpenAI: GPT-6 Luna (batch) |
| Cache Read Price (per 1M) | $0.03/1M (50% Off) | $0.025/1M (50% Off) | OpenAI: GPT-6 Luna (batch) |
| Context Window / Max Output | 1024K In / 922K Out | 1025K In / 125K Out | Z.ai: GLM 5.2 |
| P90 First-Token / Edge Latency | 280ms | 280ms | Z.ai: GLM 5.2 (-0ms) |
GLM 5.2 is a large-scale reasoning model from Z.ai. It supports text input and output with a 1M-token context window, and is suited for long-horizon agent workflows, project-level
GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol. It is suited for high-volume and latency-sensitive workloads such as chat, classi
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 Z.ai: GLM 5.2 to OpenAI: GPT-6 Luna (batch)
GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol. It is suited for high-volume and latency-sensitive workloads such as chat, classi Verified P90 latency of 280ms.