OpenAI GPT-5.6 Terra vs OpenAI: GPT-5.1-Codex-Mini: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing OpenAI GPT-5.6 Terra (gpt-5.6-terra) vs OpenAI: GPT-5.1-Codex-Mini (openai/gpt-5.1-codex-mini). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
OpenAI GPT-5.6 Terra (gpt-5.6-terra) 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).
OpenAI: GPT-5.1-Codex-Mini (openai/gpt-5.1-codex-mini) 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 OpenAI GPT-5.6 Terra (API ID: gpt-5.6-terra) vs OpenAI: GPT-5.1-Codex-Mini (API ID: openai/gpt-5.1-codex-mini), OpenAI: GPT-5.1-Codex-Mini offers lower standard input pricing at $0.25/1M tokens ($2/1M output), while OpenAI: GPT-5.1-Codex-Mini leads in cached prefix economics at $0.125/1M tokens (50% discount). OpenAI: GPT-5.1-Codex-Mini achieves a 10ms faster P90 time-to-first-token latency (280ms vs 290ms).
Enable Prompt Context Caching & Batch API to reduce repeated system prompt input token burn by 50%-97.5%.
Auto-discovered via live global telemetry registry.
| Specification / FinOps Dimension | OpenAI GPT-5.6 Terra | OpenAI: GPT-5.1-Codex-Mini | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | gpt-5.6-terra | openai/gpt-5.1-codex-mini | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $2 / $12 | $0.25 / $2 | OpenAI: GPT-5.1-Codex-Mini |
| Cache Read Price (per 1M) | $1/1M (50% Off) | $0.125/1M (50% Off) | OpenAI: GPT-5.1-Codex-Mini |
| Context Window / Max Output | 400K In / 128K Out | 391K In / 125K Out | OpenAI GPT-5.6 Terra |
| P90 First-Token / Edge Latency | 290ms | 280ms | OpenAI: GPT-5.1-Codex-Mini (-10ms) |
Balanced enterprise general-purpose model in the GPT-5.6 family with 1M context window.
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex
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-5.6 Terra to OpenAI: GPT-5.1-Codex-Mini
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex Verified P90 latency of 280ms.