StepFun Step R1 V Mini vs xAI Grok 4.3: Live Promos, Pricing, Hidden Fees & Latency
StepFun Step R1 V Mini (stepfun/step-r1-v-mini) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for StepFun Step R1 V Mini: Activate ephemeral prefix caching to slash input costs by 90% (down to 0.015/1M) or route via asynchronous Batch API for 50% off standard token rates.
xAI Grok 4.3 (grok-4.3) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for xAI Grok 4.3: Activate ephemeral prefix caching to slash input costs by 84% (down to 0.2/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing StepFun Step R1 V Mini (API ID: stepfun/step-r1-v-mini) vs xAI Grok 4.3 (API ID: grok-4.3), StepFun Step R1 V Mini offers lower standard input pricing at $0.15/1M tokens ($0.45/1M output), while StepFun Step R1 V Mini leads in cached prefix economics at $0.015/1M tokens (90% discount). xAI Grok 4.3 achieves a 70ms faster P90 time-to-first-token latency (125ms vs 195ms).
Gateway-synced rate ($0.15/$0.45 per 1M, flat 64K window). Verify upstream provider cache TTL and regional routing before high-volume batch runs.
<200K: $1.25/$2.50 ($0.20 cache); >=200K full-request 2x cliff: $2.50/$5.00 ($0.40 cache). Batch discount is 20%; Priority tier 2x; US endpoint +10%.
| Specification / FinOps Dimension | StepFun Step R1 V Mini | xAI Grok 4.3 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | stepfun/step-r1-v-mini | grok-4.3 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.15 / $0.45 | $1.25 / $2.5 | StepFun Step R1 V Mini |
| Cache Read Price (per 1M) | $0.015/1M (90% Off) | $0.2/1M (84% Off) | StepFun Step R1 V Mini |
| Context Window / Max Output | 64K In / 64K Out | 1000K In / 128K Out | xAI Grok 4.3 |
| P90 First-Token / Edge Latency | 195ms | 125ms | xAI Grok 4.3 (-70ms) |
StepFun Step R1 V Mini (stepfun/step-r1-v-mini): OpenRouter gateway-synced model at $0.15/1M input, $0.45/1M output, $0.015/1M cached input (64K context window).
xAI Grok 4.3 high-speed reasoning model: $1.25/$2.50 (Cache $0.20/1M) short context; jumps to $2.50/$5.00 (Cache $0.40/1M) on long context.
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 R1 V Mini to xAI Grok 4.3
xAI Grok 4.3 high-speed reasoning model: $1.25/$2.50 (Cache $0.20/1M) short context; jumps to $2.50/$5.00 (Cache $0.40/1M) on long context. Verified P90 latency of 125ms.