xAI: Grok Latest vs Fireworks: Ember-1: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing xAI: Grok Latest (~x-ai/grok-latest) vs Fireworks: Ember-1 (fireworks/ember-1). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
xAI: Grok Latest (~x-ai/grok-latest) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for xAI: Grok Latest: Activate ephemeral prefix caching to slash input costs by 50% (down to $1/1M) or route via asynchronous Batch API for 50% off standard token rates.
Fireworks: Ember-1 (fireworks/ember-1) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Fireworks: Ember-1: Activate ephemeral prefix caching to slash input costs by 50% (down to $1.5/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing xAI: Grok Latest (API ID: ~x-ai/grok-latest) vs Fireworks: Ember-1 (API ID: fireworks/ember-1), xAI: Grok Latest offers lower standard input pricing at $2/1M tokens ($6/1M output), while xAI: Grok Latest leads in cached prefix economics at $1/1M tokens (50% discount). xAI: Grok Latest 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 | xAI: Grok Latest | Fireworks: Ember-1 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | ~x-ai/grok-latest | fireworks/ember-1 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $2 / $6 | $3 / $15 | xAI: Grok Latest |
| Cache Read Price (per 1M) | $1/1M (50% Off) | $1.5/1M (50% Off) | xAI: Grok Latest |
| Context Window / Max Output | 488K In / 439K Out | 1024K In / 922K Out | Fireworks: Ember-1 |
| P90 First-Token / Edge Latency | 280ms | 280ms | xAI: Grok Latest (-0ms) |
This model always redirects to the latest Grok model from xAI.
Ember-1 is a specialized reasoning model from Fireworks Research, built on [Kimi K3](https://openrouter.ai/moonshotai/kimi-k3). It is designed to make every token go further: it pr
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 xAI: Grok Latest to Fireworks: Ember-1
Ember-1 is a specialized reasoning model from Fireworks Research, built on [Kimi K3](https://openrouter.ai/moonshotai/kimi-k3). It is designed to make every token go further: it pr Verified P90 latency of 280ms.