OpenAI: GPT-5.6 Terra vs OpenAI: GPT-4o: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing OpenAI: GPT-5.6 Terra (openai/gpt-5.6-terra) vs OpenAI: GPT-4o (openai/gpt-4o). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
OpenAI: GPT-5.6 Terra (openai/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-4o (openai/gpt-4o) 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: openai/gpt-5.6-terra) vs OpenAI: GPT-4o (API ID: openai/gpt-4o), OpenAI: GPT-5.6 Terra offers lower standard input pricing at $2/1M tokens ($12/1M output), while OpenAI: GPT-5.6 Terra leads in cached prefix economics at $1/1M tokens (50% discount). OpenAI: GPT-5.6 Terra 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-5.6 Terra | OpenAI: GPT-4o | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openai/gpt-5.6-terra | openai/gpt-4o | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $2 / $12 | $2.5 / $10 | OpenAI: GPT-5.6 Terra |
| Cache Read Price (per 1M) | $1/1M (50% Off) | $1.25/1M (50% Off) | OpenAI: GPT-5.6 Terra |
| Context Window / Max Output | 1025K In / 125K Out | 125K In / 16K Out | OpenAI: GPT-5.6 Terra |
| P90 First-Token / Edge Latency | 280ms | 280ms | OpenAI: GPT-5.6 Terra (-0ms) |
GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning
GPT-4o ("o" for "omni") is OpenAI's latest AI model, supporting both text and image inputs with text outputs. It maintains the intelligence level of [GPT-4 Turbo](/models/openai/gp
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-4o
GPT-4o ("o" for "omni") is OpenAI's latest AI model, supporting both text and image inputs with text outputs. It maintains the intelligence level of [GPT-4 Turbo](/models/openai/gp Verified P90 latency of 280ms.