Mistral: Mistral Small 4 vs SpaceXAI: Grok 4.20: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Mistral: Mistral Small 4 (mistralai/mistral-small-2603) vs SpaceXAI: Grok 4.20 (x-ai/grok-4.20). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Mistral: Mistral Small 4 (mistralai/mistral-small-2603) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Mistral: Mistral Small 4: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.075/1M) or route via asynchronous Batch API for 50% off standard token rates.
SpaceXAI: Grok 4.20 (x-ai/grok-4.20) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for SpaceXAI: Grok 4.20: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.625/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing Mistral: Mistral Small 4 (API ID: mistralai/mistral-small-2603) vs SpaceXAI: Grok 4.20 (API ID: x-ai/grok-4.20), Mistral: Mistral Small 4 offers lower standard input pricing at $0.15/1M tokens ($0.6/1M output), while Mistral: Mistral Small 4 leads in cached prefix economics at $0.075/1M tokens (50% discount). Mistral: Mistral Small 4 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 | Mistral: Mistral Small 4 | SpaceXAI: Grok 4.20 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | mistralai/mistral-small-2603 | x-ai/grok-4.20 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.15 / $0.6 | $1.25 / $2.5 | Mistral: Mistral Small 4 |
| Cache Read Price (per 1M) | $0.075/1M (50% Off) | $0.625/1M (50% Off) | Mistral: Mistral Small 4 |
| Context Window / Max Output | 256K In / 205K Out | 1953K In / 1758K Out | SpaceXAI: Grok 4.20 |
| P90 First-Token / Edge Latency | 280ms | 280ms | Mistral: Mistral Small 4 (-0ms) |
Mistral Small 4 is the next major release in the Mistral Small family, unifying the capabilities of several flagship Mistral models into a single system. It combines strong reasoni
Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict
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 Mistral: Mistral Small 4 to SpaceXAI: Grok 4.20
Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict Verified P90 latency of 280ms.