Z.ai: GLM 4.6 vs OpenAI GPT-6.1 Sol: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Z.ai: GLM 4.6 (z-ai/glm-4.6) vs OpenAI GPT-6.1 Sol (gpt-6.1-sol). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Z.ai: GLM 4.6 (z-ai/glm-4.6) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Z.ai: GLM 4.6: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.25/1M) or route via asynchronous Batch API for 50% off standard token rates.
OpenAI & Microsoft Founders Hub ($2,500–$150,000 Credits) + 50% Batch API Discount
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 4.6 (API ID: z-ai/glm-4.6) vs OpenAI GPT-6.1 Sol (API ID: gpt-6.1-sol), Z.ai: GLM 4.6 offers lower standard input pricing at $0.5/1M tokens ($2/1M output), while Z.ai: GLM 4.6 leads in cached prefix economics at $0.25/1M tokens (50% discount). OpenAI GPT-6.1 Sol achieves a 10ms faster P90 time-to-first-token latency (270ms vs 280ms).
Auto-discovered via live global telemetry registry.
Context Cliff Alert: Prompts exceeding 272K tokens double in price from $2/$10 to $4/$15 per 1M tokens.
| Specification / FinOps Dimension | Z.ai: GLM 4.6 | OpenAI GPT-6.1 Sol | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | z-ai/glm-4.6 | gpt-6.1-sol | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.5 / $2 | $2 / $10 | Z.ai: GLM 4.6 |
| Cache Read Price (per 1M) | $0.25/1M (50% Off) | $0.5/1M (75% Off) | Z.ai: GLM 4.6 |
| Context Window / Max Output | 200K In / 128K Out | 1000K In / 128K Out | Z.ai: GLM 4.6 |
| P90 First-Token / Edge Latency | 280ms | 270ms | OpenAI GPT-6.1 Sol (-10ms) |
Compared with GLM-4.5, this generation brings several key improvements: Longer context window: The context window has been expanded from 128K to 200K tokens, enabling the model to
OpenAI October 2026 flagship reasoning & coding model delivering near-Astra intelligence at 1/5th the cost.
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 4.6 to OpenAI GPT-6.1 Sol
OpenAI October 2026 flagship reasoning & coding model delivering near-Astra intelligence at 1/5th the cost. Verified P90 latency of 270ms.