Meta: Llama 3.1 8B Instruct vs SpaceXAI: Grok 4.6: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Meta: Llama 3.1 8B Instruct (meta-llama/llama-3.1-8b-instruct) vs SpaceXAI: Grok 4.6 (x-ai/grok-4.6). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Meta: Llama 3.1 8B Instruct (meta-llama/llama-3.1-8b-instruct) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Meta: Llama 3.1 8B Instruct: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.025/1M) or route via asynchronous Batch API for 50% off standard token rates.
SpaceXAI: Grok 4.6 (x-ai/grok-4.6) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for SpaceXAI: Grok 4.6: 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.
In Etuki October 2026 FinOps telemetry comparing Meta: Llama 3.1 8B Instruct (API ID: meta-llama/llama-3.1-8b-instruct) vs SpaceXAI: Grok 4.6 (API ID: x-ai/grok-4.6), Meta: Llama 3.1 8B Instruct offers lower standard input pricing at $0.05/1M tokens ($0.08/1M output), while Meta: Llama 3.1 8B Instruct leads in cached prefix economics at $0.025/1M tokens (50% discount). Meta: Llama 3.1 8B Instruct 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 | Meta: Llama 3.1 8B Instruct | SpaceXAI: Grok 4.6 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | meta-llama/llama-3.1-8b-instruct | x-ai/grok-4.6 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.05 / $0.08 | $2 / $6 | Meta: Llama 3.1 8B Instruct |
| Cache Read Price (per 1M) | $0.025/1M (50% Off) | $1/1M (50% Off) | Meta: Llama 3.1 8B Instruct |
| Context Window / Max Output | 128K In / 115K Out | 488K In / 439K Out | SpaceXAI: Grok 4.6 |
| P90 First-Token / Edge Latency | 280ms | 280ms | Meta: Llama 3.1 8B Instruct (-0ms) |
Meta's latest class of model (Llama 3.1) launched with a variety of sizes & flavors. This 8B instruct-tuned version is fast and efficient. It has demonstrated strong performance co
Grok 4.6 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM. It is succeeded by [Grok 4.7](/x-ai/grok-4.7).
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 Meta: Llama 3.1 8B Instruct to SpaceXAI: Grok 4.6
Grok 4.6 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM. It is succeeded by [Grok 4.7](/x-ai/grok-4.7). Verified P90 latency of 280ms.