Anthropic: Claude Sonnet 5.5 vs Z.ai: GLM Flash Latest: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Anthropic: Claude Sonnet 5.5 (anthropic/claude-sonnet-5.5) vs Z.ai: GLM Flash Latest (~z-ai/glm-flash-latest). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Anthropic: Claude Sonnet 5.5 (anthropic/claude-sonnet-5.5) — $25,000 Startup Credits & 50% Cache Promo
Anthropic's Q4 2026 developer promotion combines $25,000 in Claude API credits for early-stage builders with a permanent 20% base price reduction on Opus 5.5 ($4/$20), 0.05x ($0.20/1M) prompt cache reads, and 50% off Batch API processing ($2/$10 with 300K max output).
Z.ai: GLM Flash Latest (~z-ai/glm-flash-latest) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Z.ai: GLM Flash Latest: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.018/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing Anthropic: Claude Sonnet 5.5 (API ID: anthropic/claude-sonnet-5.5) vs Z.ai: GLM Flash Latest (API ID: ~z-ai/glm-flash-latest), Z.ai: GLM Flash Latest offers lower standard input pricing at $0.036/1M tokens ($0.9/1M output), while Z.ai: GLM Flash Latest leads in cached prefix economics at $0.018/1M tokens (50% discount). Anthropic: Claude Sonnet 5.5 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 | Anthropic: Claude Sonnet 5.5 | Z.ai: GLM Flash Latest | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | anthropic/claude-sonnet-5.5 | ~z-ai/glm-flash-latest | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $2 / $10 | $0.036 / $0.9 | Z.ai: GLM Flash Latest |
| Cache Read Price (per 1M) | $1/1M (50% Off) | $0.018/1M (50% Off) | Z.ai: GLM Flash Latest |
| Context Window / Max Output | 977K In / 125K Out | 1024K In / 922K Out | Z.ai: GLM Flash Latest |
| P90 First-Token / Edge Latency | 280ms | 280ms | Anthropic: Claude Sonnet 5.5 (-0ms) |
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fix
This model always redirects to the latest model in the GLM Flash family.
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 Anthropic: Claude Sonnet 5.5 to Z.ai: GLM Flash Latest
This model always redirects to the latest model in the GLM Flash family. Verified P90 latency of 280ms.