MoonshotAI: Kimi K3 (batch) vs xAI Grok 4.7: Live Promos, Pricing, Hidden Fees & Latency
MoonshotAI: Kimi K3 (batch) (moonshotai/kimi-k3:batch) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for MoonshotAI: Kimi K3 (batch): Activate ephemeral prefix caching to slash input costs by 50% (down to 1.14/1M) or route via asynchronous Batch API for 50% off standard token rates.
xAI Grok 4.7 (x-ai/grok-4.7) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for xAI Grok 4.7: Activate ephemeral prefix caching to slash input costs by 75% (down to 0.5/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing MoonshotAI: Kimi K3 (batch) (API ID: moonshotai/kimi-k3:batch) vs xAI Grok 4.7 (API ID: x-ai/grok-4.7), xAI Grok 4.7 offers lower standard input pricing at $2/1M tokens ($6/1M output), while xAI Grok 4.7 leads in cached prefix economics at $0.5/1M tokens (75% discount). xAI Grok 4.7 achieves a 150ms faster P90 time-to-first-token latency (130ms vs 280ms).
Auto-discovered via live global telemetry registry.
⚠️ 200K Full-Request Cliff: Prompts >=200,000 tokens (including cached tokens) double to $4.00/$12.00 ($1.00 cache). US regional endpoint adds +10%.
| Specification / FinOps Dimension | MoonshotAI: Kimi K3 (batch) | xAI Grok 4.7 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | moonshotai/kimi-k3:batch | x-ai/grok-4.7 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $2.28 / $11.4 | $2 / $6 | xAI Grok 4.7 |
| Cache Read Price (per 1M) | $1.14/1M (50% Off) | $0.5/1M (75% Off) | xAI Grok 4.7 |
| Context Window / Max Output | 1024K In / 16K Out | 500K In / 128K Out | xAI Grok 4.7 |
| P90 First-Token / Edge Latency | 280ms | 130ms | xAI Grok 4.7 (-150ms) |
Kimi K3 is a 2.8T parameter open-weight multimodal reasoning model from Moonshot AI. It is suited for complex coding, knowledge work, and long-horizon agentic workflows, and is par
xAI Grok 4.7 frontier reasoning model: <200K tokens at $2.00/$6.00 (Cache $0.50/1M); >=200K tokens jumps 2x to $4.00/$12.00 (Cache $1.00/1M) for the full request.
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 MoonshotAI: Kimi K3 (batch) to xAI Grok 4.7
xAI Grok 4.7 frontier reasoning model: <200K tokens at $2.00/$6.00 (Cache $0.50/1M); >=200K tokens jumps 2x to $4.00/$12.00 (Cache $1.00/1M) for the full request. Verified P90 latency of 130ms.