DeepSeek-V4-Flash-0731 vs Laguna S 2.1: Specs & Benchmark Comparison
DeepSeek-V4-Flash-0731 is developed by DeepSeek, while Laguna S 2.1 comes from Poolside. Both were released in July 2026. DeepSeek-V4-Flash-0731 is the larger model at roughly 304 billion parameters, against 118 billion for Laguna S 2.1.
The two models share 2 published benchmarks. DeepSeek-V4-Flash-0731 leads on 2 of them. The widest gaps are on Toolathlon, where DeepSeek-V4-Flash-0731 scores 70.0% against 49.7%; Terminal-Bench 2.1, where DeepSeek-V4-Flash-0731 scores 83.0% against 70.2%. Averaged across everything we track, DeepSeek-V4-Flash-0731 sits at 57.5% and Laguna S 2.1 at 57.4%.
Laguna S 2.1 is the cheaper API at $0.10 per million input tokens and $0.20 per million output tokens, about 40% below DeepSeek-V4-Flash-0731 at $0.14 and $0.28. Both accept a context window of about 1M tokens. On tooling, only DeepSeek-V4-Flash-0731 supports function calling and only DeepSeek-V4-Flash-0731 offers structured output.
| Characteristic | DeepSeek-V4-Flash-0731 | Laguna S 2.1 |
|---|---|---|
| Company | DeepSeek | Poolside |
| Release Date | July 31, 2026 | July 21, 2026 |
| Parameters | 304B | 118B |
| Multimodal | No | No |
| Context (input) | 1.0M | 1.0M |
| Context (output) | 393K | — |
| Input Price / 1M | $0.14 | $0.10 |
| Output Price / 1M | $0.28 | $0.20 |
| Average Score | 57.5% | 57.4% |
| Benchmarks | ||
| Toolathlon | 70.0% | 49.7% |
| Terminal-Bench 2.1 | 83.0% | 70.2% |
Visual Benchmark Comparison
Verdict
Laguna S 2.1 leads in 2 out of 4 comparison categories.
Both models show comparable average scores: DeepSeek-V4-Flash-0731 — 0.6, Laguna S 2.1 — 0.6.
Laguna S 2.1 is 1.4x cheaper: input $0.10/1M vs $0.14/1M tokens.
Laguna S 2.1 supports a larger context: 1M vs 1M tokens.
Both models were released around the same time: 7/31/2026 and 7/21/2026.
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Frequently Asked Questions
Which is better for coding — DeepSeek-V4-Flash-0731 or Laguna S 2.1?
Which model is cheaper — DeepSeek-V4-Flash-0731 or Laguna S 2.1?
Which has a larger context window — DeepSeek-V4-Flash-0731 or Laguna S 2.1?
The DeepSeek-V4-Flash-0731 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 DeepSeek-V4-Flash-0731 or Laguna S 2.1 page. See also the complete list of AI model comparisons.