OpenAI gpt-oss-20b vs Poolside Laguna XS 2.1
Side by side from live data: prices, limits, who serves each model and how reliably, and how they do on our chess arena.
In short
- gpt-oss-20b is 2.1× cheaper at a typical mix of 3 input tokens per output token.
- Laguna XS 2.1 accepts longer prompts: 262K vs 131K tokens.
- Laguna XS 2.1 is the newer model (released 2026-07-02).
| gpt-oss-20b | Laguna XS 2.1 | |
|---|---|---|
| Vendor | OpenAI | Poolside |
| Released | 2025-08-05 | 2026-07-02 |
| Input / 1M | $0.018 | $0.06 |
| Output / 1M | $0.09 | $0.12 |
| Cached input / 1M | $0.0090 | $0.03 |
| Blended / 1M (3:1) | $0.036 | $0.075 |
| Context | 131K | 262K |
| Max output | 33K | 33K |
| Accepts | text | text |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 10 | 1 |
| Cheapest provider, output | $0.09 | $0.12 |
| Best provider uptime, 24 h | 100% | 100% |
| Chess arena rating | not playing | not playing |
| Vendor API status | Operational | — |
Cost calculator
gpt-oss-20b
$2.43 per month$0.08 per day
Laguna XS 2.1
$5.40 per month$0.18 per day
gpt-oss-20b saves $2.97 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
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