Mistral: Mistral Small 3.1 24B vs xAI Grok 4.3: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Mistral: Mistral Small 3.1 24B (mistralai/mistral-small-3.1-24b-instruct) vs xAI Grok 4.3 (grok-4.3). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Mistral: Mistral Small 3.1 24B (mistralai/mistral-small-3.1-24b-instruct) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Mistral: Mistral Small 3.1 24B: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.1755/1M) or route via asynchronous Batch API for 50% off standard token rates.
xAI Grok 4.3 (grok-4.3) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for xAI Grok 4.3: 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 Mistral: Mistral Small 3.1 24B (API ID: mistralai/mistral-small-3.1-24b-instruct) vs xAI Grok 4.3 (API ID: grok-4.3), Mistral: Mistral Small 3.1 24B offers lower standard input pricing at $0.351/1M tokens ($0.555/1M output), while Mistral: Mistral Small 3.1 24B leads in cached prefix economics at $0.1755/1M tokens (50% discount). xAI Grok 4.3 achieves a 100ms faster P90 time-to-first-token latency (180ms vs 280ms).
Auto-discovered via live global telemetry registry.
Enable Prompt Context Caching & Batch API to reduce repeated system prompt input token burn by 50%-97.5%.
| Specification / FinOps Dimension | Mistral: Mistral Small 3.1 24B | xAI Grok 4.3 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | mistralai/mistral-small-3.1-24b-instruct | grok-4.3 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.351 / $0.555 | $2 / $10 | Mistral: Mistral Small 3.1 24B |
| Cache Read Price (per 1M) | $0.1755/1M (50% Off) | $1/1M (50% Off) | Mistral: Mistral Small 3.1 24B |
| Context Window / Max Output | 125K In / 100K Out | 512K In / 128K Out | xAI Grok 4.3 |
| P90 First-Token / Edge Latency | 280ms | 180ms | xAI Grok 4.3 (-100ms) |
Mistral Small 3.1 24B Instruct is an upgraded variant of Mistral Small 3 (2501), featuring 24 billion parameters with advanced multimodal capabilities. It provides state-of-the-art
xAI October 2026 frontier reasoning model with live X/Web grounding and sub-200ms latency.
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 3.1 24B to xAI Grok 4.3
xAI October 2026 frontier reasoning model with live X/Web grounding and sub-200ms latency. Verified P90 latency of 180ms.