OpenAI: gpt-oss-120b vs Mistral: Ministral 3 3B 2512: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing OpenAI: gpt-oss-120b (openai/gpt-oss-120b) vs Mistral: Ministral 3 3B 2512 (mistralai/ministral-3b-2512). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
OpenAI: gpt-oss-120b (openai/gpt-oss-120b) 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).
Mistral: Ministral 3 3B 2512 (mistralai/ministral-3b-2512) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Mistral: Ministral 3 3B 2512: 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 OpenAI: gpt-oss-120b (API ID: openai/gpt-oss-120b) vs Mistral: Ministral 3 3B 2512 (API ID: mistralai/ministral-3b-2512), Mistral: Ministral 3 3B 2512 offers lower standard input pricing at $0.1/1M tokens ($0.1/1M output), while Mistral: Ministral 3 3B 2512 leads in cached prefix economics at $0.05/1M tokens (50% discount). OpenAI: gpt-oss-120b 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 | OpenAI: gpt-oss-120b | Mistral: Ministral 3 3B 2512 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openai/gpt-oss-120b | mistralai/ministral-3b-2512 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.15 / $0.6 | $0.1 / $0.1 | Mistral: Ministral 3 3B 2512 |
| Cache Read Price (per 1M) | $0.075/1M (50% Off) | $0.05/1M (50% Off) | Mistral: Ministral 3 3B 2512 |
| Context Window / Max Output | 128K In / 64K Out | 128K In / 102K Out | Mistral: Ministral 3 3B 2512 |
| P90 First-Token / Edge Latency | 280ms | 280ms | OpenAI: gpt-oss-120b (-0ms) |
gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. I
The smallest model in the Ministral 3 family, Ministral 3 3B is a powerful, efficient tiny language model with vision capabilities.
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 OpenAI: gpt-oss-120b to Mistral: Ministral 3 3B 2512
The smallest model in the Ministral 3 family, Ministral 3 3B is a powerful, efficient tiny language model with vision capabilities. Verified P90 latency of 280ms.