OpenAI GPT-5.5 vs OpenAI GPT-6 Astra: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing OpenAI GPT-5.5 (gpt-5.5) vs OpenAI GPT-6 Astra (gpt-6-astra). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
OpenAI GPT-5.5 (gpt-5.5) 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-6 Astra (gpt-6-astra) 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-5.5 (API ID: gpt-5.5) vs OpenAI GPT-6 Astra (API ID: gpt-6-astra), OpenAI GPT-5.5 offers lower standard input pricing at $5/1M tokens ($30/1M output), while OpenAI GPT-5.5 leads in cached prefix economics at $2.5/1M tokens (50% discount). OpenAI GPT-5.5 achieves a 100ms faster P90 time-to-first-token latency (320ms vs 420ms).
Enable Prompt Context Caching & Batch API to reduce repeated system prompt input token burn by 50%-97.5%.
Billed at $10/$50 (<272K) and jumps to $20/$75 (>272K). Reserve strictly for hard computer-use orchestration.
| Specification / FinOps Dimension | OpenAI GPT-5.5 | OpenAI GPT-6 Astra | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | gpt-5.5 | gpt-6-astra | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $5 / $30 | $10 / $50 | OpenAI GPT-5.5 |
| Cache Read Price (per 1M) | $2.5/1M (50% Off) | $2.5/1M (75% Off) | OpenAI GPT-5.5 |
| Context Window / Max Output | 1000K In / 128K Out | 1000K In / 128K Out | OpenAI GPT-5.5 |
| P90 First-Token / Edge Latency | 320ms | 420ms | OpenAI GPT-5.5 (-100ms) |
Flagship GPT-5 series general model with configurable reasoning_effort from none to xhigh.
OpenAI most powerful computer-use and autonomous multi-agent flagship model built for zero-failure enterprise tasks.
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-5.5 to OpenAI GPT-6 Astra
OpenAI most powerful computer-use and autonomous multi-agent flagship model built for zero-failure enterprise tasks. Verified P90 latency of 420ms.