Claude Opus 5 vs Laguna XS 2.1: Specs & Benchmark Comparison
Claude Opus 5 is developed by Anthropic, while Laguna XS 2.1 comes from Poolside. Both were released in July 2026. Laguna XS 2.1 has a published size of about 33 billion parameters; Anthropic has not disclosed the parameter count of Claude Opus 5.
We have 13 benchmark results for Claude Opus 5 and 4 benchmark results for Laguna XS 2.1, but they were measured on different benchmarks, so there is no like-for-like scoreboard.
Laguna XS 2.1 is the cheaper API at $0.10 per million input tokens and $0.20 per million output tokens, roughly 50 times cheaper than Claude Opus 5 at $5 and $25. Claude Opus 5 takes the larger context window at 1M tokens, compared with 262K for Laguna XS 2.1. Claude Opus 5 accepts text and images as input, while Laguna XS 2.1 accepts text. On tooling, only Claude Opus 5 supports function calling and only Claude Opus 5 offers structured output.
| Characteristic | Claude Opus 5 | Laguna XS 2.1 |
|---|---|---|
| Company | Anthropic | Poolside |
| Release Date | July 24, 2026 | July 2, 2026 |
| Parameters | — | 33B |
| Multimodal | Yes | No |
| Context (input) | 1.0M | 262K |
| Context (output) | 128K | — |
| Input Price / 1M | $5.00 | $0.10 |
| Output Price / 1M | $25.00 | $0.20 |
| Average Score | 55.0% | 54.8% |
Verdict
Claude Opus 5 leads in 2 out of 4 comparison categories.
Both models show comparable average scores: Claude Opus 5 — 0.5, Laguna XS 2.1 — 0.5.
Laguna XS 2.1 is 100.0x cheaper: input $0.10/1M vs $5.00/1M tokens.
Claude Opus 5 supports a larger context: 1M vs 262K tokens.
Claude Opus 5 is newer: released 7/24/2026 vs 7/2/2026.
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Frequently Asked Questions
Which is better for coding — Claude Opus 5 or Laguna XS 2.1?
Which model is cheaper — Claude Opus 5 or Laguna XS 2.1?
Which has a larger context window — Claude Opus 5 or Laguna XS 2.1?
The Claude Opus 5 and Laguna XS 2.1 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Opus 5 or Laguna XS 2.1 page. See also the complete list of AI model comparisons.