Laguna S 2.1
$0.09 per 1M input tokens and $0.18 per 1M output tokens · 1.05M context · tools, reasoning, open weights.
Prices checked Oct 21, 2026 · tracked by LLM Cost Index since Oct 21, 2026
What Laguna S 2.1 costs per month
Estimated monthly bill for typical workloads, using the cached-input price for repeated context. Try your own numbers in the cost calculator.
| Workload | Per month |
|---|---|
| Customer chatbot 1,000 conversations a day, 8 turns each | $30.02 |
| Document Q&A (RAG) 500 questions a day over retrieved documents | $8.72 |
| Coding / tool-using agent 200 tasks a day, long tool-heavy contexts | $14.85 |
| Content generation 30 long articles a day | $0.648 |
| Classification / extraction 100,000 short items a day | $89.10 |
Price history
We started tracking Laguna S 2.1 on Oct 21, 2026; the chart appears as soon as there is a second data point. See all recent price changes.
Cheaper alternatives to Laguna S 2.1
Models with the same tool calling for at least 20% less (3:1 input/output mix), most capable first.
| Model | Input / 1M | Output / 1M | Context | Capabilities |
|---|---|---|---|---|
| GLM 5.3 Flash Z.ai | $0.041 | $0.12 | 1.05M | visiontoolsreasoningJSONopen weights |
| Ling 3.0 Flash VL inclusionAI | $0.06 | $0.18 | 131K | visiontoolsreasoningJSONopen weights |
| Solar Mini 4 Upstage | $0.05 | $0.20 | 524K | toolsreasoningJSON |
| Ling 3.0 Flash inclusionAI | $0.021 | $0.063 | 262K | toolsreasoningJSONopen weights |
| Mercury 2.5 Inception | $0.04 | $0.15 | 260K | toolsreasoningJSON |
What to switch to before Laguna S 2.1 is retired
Replacements with the same must-have capabilities (tool calling) and enough context, most capable first. See all models being retired.
| Replacement | Input / 1M | Output / 1M | Price vs today |
|---|---|---|---|
| Claude Opus 5.5 | $4.00 | $20.00 | 7011% more |
| Claude Sonnet 5.5 | $2.00 | $10.00 | 3456% more |
| Claude Fable 5.1 | $10.00 | $50.00 | 17678% more |
| GPT-6 Astra | $10.00 | $50.00 | 17678% more |
How to pay less for Laguna S 2.1
For a customer chatbot (1,000 conversations a day, 8 turns each) that costs $47.52 a month at list price without caching:
| Option | Per month | You save |
|---|---|---|
| Move to GLM 5.3 Flash (similar capabilities) | $16.82 | $30.70 (65%) |
| Use prompt caching (60% of input cached) | $30.02 | $17.50 (37%) |
Other workloads: cut-your-bill tool for Laguna S 2.1.
Specifications
| Model ID | poolside/laguna-s-2.1 |
| Input | text |
| Output | text |
| Tool calling | Yes |
| Structured output | No |
| Reasoning mode | Yes |
| Open weights | Yes — poolside/Laguna-S-2.1 |
| Released | Jul 21, 2026 |
FAQ
- How much does Laguna S 2.1 cost?
- $0.09 per million input tokens and $0.18 per million output tokens; cached input costs $0.0090 per million. Prices as of Oct 21, 2026.
- What is the context window of Laguna S 2.1?
- 1.05M tokens, with up to 131K output tokens per response.
- Does Laguna S 2.1 support images, tools and structured output?
- Images as input: no. Tool calling: yes. Structured (JSON) output: no. Reasoning mode: yes.
- What are cheaper alternatives to Laguna S 2.1?
- Models with the same key capabilities for at least 20% less include GLM 5.3 Flash ($0.041 / $0.12), Ling 3.0 Flash VL ($0.06 / $0.18), Solar Mini 4 ($0.05 / $0.20).
More from Poolside: all Poolside models · how we collect prices