StepFun: Step 5 Preview vs Perceptron: Perceptron Mk1: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing StepFun: Step 5 Preview (stepfun/step-5-preview) vs Perceptron: Perceptron Mk1 (perceptron/perceptron-mk1). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
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.
Perceptron: Perceptron Mk1 (perceptron/perceptron-mk1) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Perceptron: Perceptron Mk1: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.075/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing StepFun: Step 5 Preview (API ID: stepfun/step-5-preview) vs Perceptron: Perceptron Mk1 (API ID: perceptron/perceptron-mk1), Perceptron: Perceptron Mk1 offers lower standard input pricing at $0.15/1M tokens ($1.5/1M output), while Perceptron: Perceptron Mk1 leads in cached prefix economics at $0.075/1M tokens (50% discount). StepFun: Step 5 Preview 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 | StepFun: Step 5 Preview | Perceptron: Perceptron Mk1 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | stepfun/step-5-preview | perceptron/perceptron-mk1 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $1 / $2.7 | $0.15 / $1.5 | Perceptron: Perceptron Mk1 |
| Cache Read Price (per 1M) | $0.5/1M (50% Off) | $0.075/1M (50% Off) | Perceptron: Perceptron Mk1 |
| Context Window / Max Output | 1024K In / 63K Out | 32K In / 8K Out | StepFun: Step 5 Preview |
| P90 First-Token / Edge Latency | 280ms | 280ms | StepFun: Step 5 Preview (-0ms) |
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
Perceptron Mk1 (Mark One) is Perceptron's highest-quality vision-language model for video and embodied reasoning.** It accepts image and video inputs paired with natural language q
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 StepFun: Step 5 Preview to Perceptron: Perceptron Mk1
Perceptron Mk1 (Mark One) is Perceptron's highest-quality vision-language model for video and embodied reasoning.** It accepts image and video inputs paired with natural language q Verified P90 latency of 280ms.