Mistral: Mistral Small 4 vs OpenAI: GPT Luna Latest: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Mistral: Mistral Small 4 (mistralai/mistral-small-2603) vs OpenAI: GPT Luna Latest (~openai/gpt-luna-latest). 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.
OpenAI: GPT Luna Latest (~openai/gpt-luna-latest) Startup Credits & Batch API 50% Off Promo
OpenAI GPT-6.1 Sol ($2/$10 base rate) qualifies for immediate 75% automatic prefix caching ($0.50/1M), 50% off 24-hour Batch API completions ($1/$5), and up to $150,000 in OpenAI/Azure Foundry credits via Microsoft for Startups Founders Hub (no VC funding required for initial tiers).
In Etuki October 2026 FinOps telemetry comparing Mistral: Mistral Small 4 (API ID: mistralai/mistral-small-2603) vs OpenAI: GPT Luna Latest (API ID: ~openai/gpt-luna-latest), OpenAI: GPT Luna Latest offers lower standard input pricing at $0.1/1M tokens ($0.5/1M output), while OpenAI: GPT Luna Latest leads in cached prefix economics at $0.05/1M 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 | OpenAI: GPT Luna Latest | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | mistralai/mistral-small-2603 | ~openai/gpt-luna-latest | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.15 / $0.6 | $0.1 / $0.5 | OpenAI: GPT Luna Latest |
| Cache Read Price (per 1M) | $0.075/1M (50% Off) | $0.05/1M (50% Off) | OpenAI: GPT Luna Latest |
| Context Window / Max Output | 256K In / 205K Out | 1025K In / 125K Out | Mistral: Mistral Small 4 |
| 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
This model always redirects to the latest model in the GPT Luna family.
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 OpenAI: GPT Luna Latest
This model always redirects to the latest model in the GPT Luna family. Verified P90 latency of 280ms.