Reka Flash 3 vs Z.ai: GLM 5.3: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Reka Flash 3 (rekaai/reka-flash-3) vs Z.ai: GLM 5.3 (z-ai/glm-5.3). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Reka Flash 3 (rekaai/reka-flash-3) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Reka Flash 3: 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.
Z.ai: GLM 5.3 (z-ai/glm-5.3) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Z.ai: GLM 5.3: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.0395/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing Reka Flash 3 (API ID: rekaai/reka-flash-3) vs Z.ai: GLM 5.3 (API ID: z-ai/glm-5.3), Z.ai: GLM 5.3 offers lower standard input pricing at $0.079/1M tokens ($4.8/1M output), while Z.ai: GLM 5.3 leads in cached prefix economics at $0.0395/1M tokens (50% discount). Reka Flash 3 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 | Reka Flash 3 | Z.ai: GLM 5.3 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | rekaai/reka-flash-3 | z-ai/glm-5.3 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.1 / $0.2 | $0.079 / $4.8 | Z.ai: GLM 5.3 |
| Cache Read Price (per 1M) | $0.05/1M (50% Off) | $0.0395/1M (50% Off) | Z.ai: GLM 5.3 |
| Context Window / Max Output | 64K In / 58K Out | 1024K In / 922K Out | Z.ai: GLM 5.3 |
| P90 First-Token / Edge Latency | 280ms | 280ms | Reka Flash 3 (-0ms) |
Reka Flash 3 is a general-purpose, instruction-tuned large language model with 21 billion parameters, developed by Reka. It excels at general chat, coding tasks, instruction-follow
GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context w
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 Reka Flash 3 to Z.ai: GLM 5.3
GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context w Verified P90 latency of 280ms.