Z.ai: GLM 5.3 Flash vs Reflection: Beam 1.0 501B A23B: Live Promos, Pricing, Hidden Fees & Latency
Z.ai: GLM 5.3 Flash (z-ai/glm-5.3-flash) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Z.ai: GLM 5.3 Flash: Activate ephemeral prefix caching to slash input costs by 50% (down to 0.0206/1M) or route via asynchronous Batch API for 50% off standard token rates.
Reflection: Beam 1.0 501B A23B (reflection/beam-1.0-501b-a23b) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Reflection: Beam 1.0 501B A23B: Activate ephemeral prefix caching to slash input costs by 50% (down to 0.15/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing Z.ai: GLM 5.3 Flash (API ID: z-ai/glm-5.3-flash) vs Reflection: Beam 1.0 501B A23B (API ID: reflection/beam-1.0-501b-a23b), Z.ai: GLM 5.3 Flash offers lower standard input pricing at $0.0412/1M tokens ($0.12/1M output), while Z.ai: GLM 5.3 Flash leads in cached prefix economics at $0.0206/1M tokens (50% discount). Z.ai: GLM 5.3 Flash 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 5.3 Flash | Reflection: Beam 1.0 501B A23B | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | z-ai/glm-5.3-flash | reflection/beam-1.0-501b-a23b | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.0412 / $0.12 | $0.3 / $1 | Z.ai: GLM 5.3 Flash |
| Cache Read Price (per 1M) | $0.0206/1M (50% Off) | $0.15/1M (50% Off) | Z.ai: GLM 5.3 Flash |
| Context Window / Max Output | 1024K In / 922K Out | 1024K In / 922K Out | Z.ai: GLM 5.3 Flash |
| P90 First-Token / Edge Latency | 280ms | 280ms | Z.ai: GLM 5.3 Flash (-0ms) |
GLM-5.3-Flash is a native multimodal model from Z.ai. It is suited for efficient coding and long-horizon agent tasks. Its hybrid sparse and linear attention architecture maintains
Beam 1.0 is Reflection's open-weight reasoning model for coding and long-horizon agentic workflows. It uses a sparse mixture-of-experts architecture with 501B total and 23B active
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 5.3 Flash to Reflection: Beam 1.0 501B A23B
Beam 1.0 is Reflection's open-weight reasoning model for coding and long-horizon agentic workflows. It uses a sparse mixture-of-experts architecture with 501B total and 23B active Verified P90 latency of 280ms.