SpaceXAI: Grok Build 0.1 vs Reka Flash 3: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing SpaceXAI: Grok Build 0.1 (x-ai/grok-build-0.1) vs Reka Flash 3 (rekaai/reka-flash-3). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
SpaceXAI: Grok Build 0.1 (x-ai/grok-build-0.1) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for SpaceXAI: Grok Build 0.1: 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.
Reka Flash 3 (rekaai/reka-flash-3) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Reka Flash 3: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.05/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing SpaceXAI: Grok Build 0.1 (API ID: x-ai/grok-build-0.1) vs Reka Flash 3 (API ID: rekaai/reka-flash-3), Reka Flash 3 offers lower standard input pricing at $0.1/1M tokens ($0.2/1M output), while Reka Flash 3 leads in cached prefix economics at $0.05/1M tokens (50% discount). SpaceXAI: Grok Build 0.1 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 | SpaceXAI: Grok Build 0.1 | Reka Flash 3 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | x-ai/grok-build-0.1 | rekaai/reka-flash-3 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $1 / $2 | $0.1 / $0.2 | Reka Flash 3 |
| Cache Read Price (per 1M) | $0.5/1M (50% Off) | $0.05/1M (50% Off) | Reka Flash 3 |
| Context Window / Max Output | 250K In / 225K Out | 64K In / 58K Out | SpaceXAI: Grok Build 0.1 |
| P90 First-Token / Edge Latency | 280ms | 280ms | SpaceXAI: Grok Build 0.1 (-0ms) |
Grok Build 0.1 is SpaceXAI’s fast coding model trained specifically for agentic software engineering workflows. It supports text and image inputs with text output, and is optimized
Reka Flash 3 is a general-purpose, instruction-tuned large language model with 21 billion parameters, developed by Reka. It excels at general chat, coding tasks, instruction-follow
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 SpaceXAI: Grok Build 0.1 to Reka Flash 3
Reka Flash 3 is a general-purpose, instruction-tuned large language model with 21 billion parameters, developed by Reka. It excels at general chat, coding tasks, instruction-follow Verified P90 latency of 280ms.