Anthropic Claude Haiku 5.5 vs Poolside: Laguna S 2.1 (free): Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Anthropic Claude Haiku 5.5 (claude-haiku-5-5) vs Poolside: Laguna S 2.1 (free) (poolside/laguna-s-2.1:free). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Anthropic Claude Haiku 5.5 (claude-haiku-5-5) — $25,000 Startup Credits & 90% Cache Promo
Anthropic's Q4 2026 developer promotion combines $25,000 in Claude API credits for early-stage builders with a permanent 20% base price reduction on Opus 5.5 ($4/$20), 0.05x ($0.20/1M) prompt cache reads, and 50% off Batch API processing ($2/$10 with 300K max output).
Poolside: Laguna S 2.1 (free) (poolside/laguna-s-2.1:free) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Poolside: Laguna S 2.1 (free): Activate ephemeral prefix caching to slash input costs by 50% (down to $0/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing Anthropic Claude Haiku 5.5 (API ID: claude-haiku-5-5) vs Poolside: Laguna S 2.1 (free) (API ID: poolside/laguna-s-2.1:free), Poolside: Laguna S 2.1 (free) offers lower standard input pricing at $0/1M tokens ($0/1M output), while Poolside: Laguna S 2.1 (free) leads in cached prefix economics at $0/1M tokens (50% discount). Anthropic Claude Haiku 5.5 achieves a 160ms faster P90 time-to-first-token latency (120ms vs 280ms).
Severe Context Cliff: Prompts over 100,000 tokens jump 500% from $0.10/$0.50 to $0.50/$2.50 per 1M tokens!
Auto-discovered via live global telemetry registry.
| Specification / FinOps Dimension | Anthropic Claude Haiku 5.5 | Poolside: Laguna S 2.1 (free) | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | claude-haiku-5-5 | poolside/laguna-s-2.1:free | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.1 / $0.5 | $0 / $0 | Poolside: Laguna S 2.1 (free) |
| Cache Read Price (per 1M) | $0.01/1M (90% Off) | $0/1M (50% Off) | Poolside: Laguna S 2.1 (free) |
| Context Window / Max Output | 400K In / 64K Out | 256K In / 32K Out | Anthropic Claude Haiku 5.5 |
| P90 First-Token / Edge Latency | 120ms | 280ms | Anthropic Claude Haiku 5.5 (-160ms) |
Ultra-fast classification, extraction, and routing model with $0.01/1M cache reads under 100K prompt tokens.
Laguna S 2.1 is the latest coding agent model from [Poolside](<https://poolside.ai/>). Laguna S 2.1 is a 118B total parameter model with 8B active parameters, scoring 70.2% on Term
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 Anthropic Claude Haiku 5.5 to Poolside: Laguna S 2.1 (free)
Laguna S 2.1 is the latest coding agent model from [Poolside](<https://poolside.ai/>). Laguna S 2.1 is a 118B total parameter model with 8B active parameters, scoring 70.2% on Term Verified P90 latency of 280ms.