OpenAI: GPT-5 Nano vs Poolside: Laguna XS 2.1: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing OpenAI: GPT-5 Nano (openai/gpt-5-nano) vs Poolside: Laguna XS 2.1 (poolside/laguna-xs-2.1). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
OpenAI: GPT-5 Nano (openai/gpt-5-nano) 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).
Poolside: Laguna XS 2.1 (poolside/laguna-xs-2.1) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Poolside: Laguna XS 2.1: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.03/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing OpenAI: GPT-5 Nano (API ID: openai/gpt-5-nano) vs Poolside: Laguna XS 2.1 (API ID: poolside/laguna-xs-2.1), OpenAI: GPT-5 Nano offers lower standard input pricing at $0.05/1M tokens ($0.4/1M output), while OpenAI: GPT-5 Nano leads in cached prefix economics at $0.025/1M tokens (50% discount). OpenAI: GPT-5 Nano 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 Nano | Poolside: Laguna XS 2.1 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openai/gpt-5-nano | poolside/laguna-xs-2.1 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.05 / $0.4 | $0.06 / $0.12 | OpenAI: GPT-5 Nano |
| Cache Read Price (per 1M) | $0.025/1M (50% Off) | $0.03/1M (50% Off) | OpenAI: GPT-5 Nano |
| Context Window / Max Output | 391K In / 125K Out | 256K In / 32K Out | OpenAI: GPT-5 Nano |
| P90 First-Token / Edge Latency | 280ms | 280ms | OpenAI: GPT-5 Nano (-0ms) |
GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasonin
Laguna XS 2.1 is the latest coding agent model in the 33B-A3B category from [Poolside](https://poolside.ai/) and a step forward from their Laguna XS.2 model (released in April 2026
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 Nano to Poolside: Laguna XS 2.1
Laguna XS 2.1 is the latest coding agent model in the 33B-A3B category from [Poolside](https://poolside.ai/) and a step forward from their Laguna XS.2 model (released in April 2026 Verified P90 latency of 280ms.