OpenAI: GPT Chat Latest vs OpenAI: GPT Luna Latest: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing OpenAI: GPT Chat Latest (openai/gpt-chat-latest) vs OpenAI: GPT Luna Latest (~openai/gpt-luna-latest). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
OpenAI: GPT Chat Latest (openai/gpt-chat-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).
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 OpenAI: GPT Chat Latest (API ID: openai/gpt-chat-latest) 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). OpenAI: GPT Chat Latest 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 Chat Latest | OpenAI: GPT Luna Latest | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openai/gpt-chat-latest | ~openai/gpt-luna-latest | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $5 / $30 | $0.1 / $0.5 | OpenAI: GPT Luna Latest |
| Cache Read Price (per 1M) | $2.5/1M (50% Off) | $0.05/1M (50% Off) | OpenAI: GPT Luna Latest |
| Context Window / Max Output | 391K In / 125K Out | 1025K In / 125K Out | OpenAI: GPT Chat Latest |
| P90 First-Token / Edge Latency | 280ms | 280ms | OpenAI: GPT Chat Latest (-0ms) |
GPT Chat Latest points to OpenAI's stable API alias `chat-latest` that always resolves to the latest Instant chat model used in ChatGPT. As OpenAI rolls out new Instant model updat
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 OpenAI: GPT Chat Latest to OpenAI: GPT Luna Latest
This model always redirects to the latest model in the GPT Luna family. Verified P90 latency of 280ms.