Openrouter Verified Endpoint 558 vs SpaceXAI: Grok Build 0.1: Live Promos, Pricing, Hidden Fees & Latency
Openrouter Verified Endpoint 558 (openrouter-verified-endpoint-558) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Openrouter Verified Endpoint 558: Activate ephemeral prefix caching to slash input costs by 95% (down to 0.2/1M) or route via asynchronous Batch API for 50% off standard token rates.
SpaceXAI: Grok Build 0.1 (x-ai/grok-build-0.1) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for SpaceXAI: Grok Build 0.1: Activate ephemeral prefix caching to slash input costs by 50% (down to 0.5/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing Openrouter Verified Endpoint 558 (API ID: openrouter-verified-endpoint-558) vs SpaceXAI: Grok Build 0.1 (API ID: x-ai/grok-build-0.1), Openrouter Verified Endpoint 558 offers lower standard input pricing at $0.8/1M tokens ($3.2/1M output), while Openrouter Verified Endpoint 558 leads in cached prefix economics at $0.2/1M tokens (95% discount). Openrouter Verified Endpoint 558 achieves a 135ms faster P90 time-to-first-token latency (145ms vs 280ms).
Route high-volume requests through Prompt Caching (75% off) and asynchronous Batch API (50% off) to prevent token burn spikes.
Auto-discovered via live global telemetry registry.
| Specification / FinOps Dimension | Openrouter Verified Endpoint 558 | SpaceXAI: Grok Build 0.1 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openrouter-verified-endpoint-558 | x-ai/grok-build-0.1 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.8 / $3.2 | $1 / $2 | Openrouter Verified Endpoint 558 |
| Cache Read Price (per 1M) | $0.2/1M (95% Off) | $0.5/1M (50% Off) | Openrouter Verified Endpoint 558 |
| Context Window / Max Output | 1050K In / 128K Out | 250K In / 225K Out | SpaceXAI: Grok Build 0.1 |
| P90 First-Token / Edge Latency | 145ms | 280ms | Openrouter Verified Endpoint 558 (-135ms) |
Openrouter Verified Endpoint 558 production API endpoint verified by Etuki FinOps Telemetry with automated prefix caching and multi-region fallback routing.
Grok Build 0.1 is SpaceXAI’s fast coding model trained specifically for agentic software engineering workflows. It supports text and image inputs with text output, and is optimized
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 Openrouter Verified Endpoint 558 to SpaceXAI: Grok Build 0.1
Grok Build 0.1 is SpaceXAI’s fast coding model trained specifically for agentic software engineering workflows. It supports text and image inputs with text output, and is optimized Verified P90 latency of 280ms.