StepFun: Step 5 Preview vs Anthropic: Claude Sonnet 5 (batch): Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing StepFun: Step 5 Preview (stepfun/step-5-preview) vs Anthropic: Claude Sonnet 5 (batch) (anthropic/claude-sonnet-5:batch). 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.
Anthropic: Claude Sonnet 5 (batch) (anthropic/claude-sonnet-5:batch) — $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).
In Etuki October 2026 FinOps telemetry comparing StepFun: Step 5 Preview (API ID: stepfun/step-5-preview) vs Anthropic: Claude Sonnet 5 (batch) (API ID: anthropic/claude-sonnet-5:batch), StepFun: Step 5 Preview offers lower standard input pricing at $1/1M tokens ($2.7/1M output), while StepFun: Step 5 Preview leads in cached prefix economics at $0.5/1M 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 | Anthropic: Claude Sonnet 5 (batch) | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | stepfun/step-5-preview | anthropic/claude-sonnet-5:batch | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $1 / $2.7 | $1 / $5 | StepFun: Step 5 Preview |
| Cache Read Price (per 1M) | $0.5/1M (50% Off) | $0.5/1M (50% Off) | StepFun: Step 5 Preview |
| Context Window / Max Output | 1024K In / 63K Out | 977K In / 125K Out | Anthropic: Claude Sonnet 5 (batch) |
| 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
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reaso
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 Anthropic: Claude Sonnet 5 (batch)
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reaso Verified P90 latency of 280ms.