Openrouter Verified Endpoint 558 vs StepFun: Step 5 Preview: 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.
StepFun: Step 5 Preview (stepfun/step-5-preview) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for StepFun: Step 5 Preview: 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 StepFun: Step 5 Preview (API ID: stepfun/step-5-preview), 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 | StepFun: Step 5 Preview | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openrouter-verified-endpoint-558 | stepfun/step-5-preview | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.8 / $3.2 | $1 / $2.7 | 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 | 1024K In / 63K Out | Openrouter Verified Endpoint 558 |
| 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.
Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in softwar
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 StepFun: Step 5 Preview
Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in softwar Verified P90 latency of 280ms.