GPT-5.1 Medium vs Laguna S 2.1: Specs & Benchmark Comparison
| Characteristic | GPT-5.1 Medium | Laguna S 2.1 |
|---|---|---|
| Company | OpenAI | Poolside |
| Release Date | November 11, 2025 | July 21, 2026 |
| Parameters | — | 118B |
| Multimodal | Yes | No |
| Context (input) | 256K | 1.0M |
| Context (output) | 64K | — |
| Input Price / 1M | $1.00 | $0.10 |
| Output Price / 1M | $4.00 | $0.20 |
| Average Score | 1.0 | 0.6 |
Verdict
Laguna S 2.1 leads in 3 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: GPT-5.1 Medium — 1.0, Laguna S 2.1 — 0.6.
API Cost
Laguna S 2.1 is 16.7x cheaper: input $0.10/1M vs $1.00/1M tokens.
Context Window
Laguna S 2.1 supports a larger context: 1M vs 256K tokens.
Recency
Laguna S 2.1 is newer: released 7/21/2026 vs 11/11/2025.
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Frequently Asked Questions
Which is better for coding — GPT-5.1 Medium or Laguna S 2.1?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — GPT-5.1 Medium or Laguna S 2.1?
Laguna S 2.1 is cheaper for input: $0.10 per 1M tokens vs $1.00.
Which has a larger context window — GPT-5.1 Medium or Laguna S 2.1?
Laguna S 2.1 supports a larger context: 1,048,576 tokens vs 256,000.
The GPT-5.1 Medium and Laguna S 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 GPT-5.1 Medium or Laguna S 2.1 page. See also the complete list of AI model comparisons.