Model comparison
Gemini 3.5 Flash-Lite vs Laguna S 2.1
Head-to-head evidence from 3 shared benchmark results across 2 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Evidence parity. Gemini 3.5 Flash-Lite and Laguna S 2.1 share 3 comparable benchmark results. 2 of 8 categories are comparable. 18 results are unique to Gemini 3.5 Flash-Lite; 3 to Laguna S 2.1.
Updated July 21, 2026- Shared results
- 3
- Gemini 3.5 Flash-Lite only
- 18
- Laguna S 2.1 only
- 3
- Comparable categories
- 2 / 8
Treat this as a split decision. Gemini 3.5 Flash-Lite makes more sense if its workflow fits your team better; Laguna S 2.1 is the better fit if agentic is the priority or you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 3 shared benchmark results across 2 evidence categories; 2 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Gemini 3.5 Flash-Lite and Laguna S 2.1 finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.
Gemini 3.5 Flash-Lite is also the more expensive model on tokens at $0.30 input / $2.50 output per 1M tokens, versus $0.10 input / $0.20 output per 1M tokens for Laguna S 2.1. That is roughly 12.5x on output cost alone.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Gemini 3.5 Flash-Lite | Δ | Laguna S 2.1 |
|---|---|---|---|
| Agentic | Gemini 3.5 Flash-Lite63.4 | Margin→ 6.8 | Laguna S 2.170.2 |
| Coding | Gemini 3.5 Flash-Lite54.2 | Margin→ 5.2 | Laguna S 2.159.4 |
| Reasoning | Gemini 3.5 Flash-Lite72.2 | MarginNo overlap | Laguna S 2.1Not measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
Terminal-Bench 2.0
AgenticA 54%B 70.2%Winner: Laguna S 2.1Δ 16.2Terminal-Bench 2.0: Gemini 3.5 Flash-Lite scored 54%; Laguna S 2.1 scored 70.2%. Laguna S 2.1 wins this benchmark. - Source ↗
SWE-bench Pro
CodingA 54.2%B 59.4%Winner: Laguna S 2.1Δ 5.2SWE-bench Pro: Gemini 3.5 Flash-Lite scored 54.2%; Laguna S 2.1 scored 59.4%. Laguna S 2.1 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Gemini 3.5 Flash-Lite | Laguna S 2.1 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Gemini 3.5 Flash-Lite$0.3 input / $2.5 output | Laguna S 2.1$0.1 input / $0.2 output | Laguna S 2.1 has the lower combined listed price. |
| Generation speedtokens per second | Gemini 3.5 Flash-LiteNot available | Laguna S 2.1Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Gemini 3.5 Flash-LiteNot available | Laguna S 2.1Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Gemini 3.5 Flash-Lite1M | Laguna S 2.11M | Listed context windows are equal. |
Benchmark Deep Dive
AgenticLaguna S 2.1 wins8 benchmarks
| Benchmark | Gemini 3.5 Flash-Lite | Laguna S 2.1 | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 54% | 70.2% | Laguna S 2.1 leads |
| OSWorld-VerifiedSource | 74% | — | Not comparable |
| GDPval-AASource | 1140 | — | Not comparable |
| AA Agentic IndexSource | 26.8% | — | Not comparable |
| GDPval-AASource | 32.0% | — | Not comparable |
| AA BriefcaseSource | 634 | — | Not comparable |
| AA Tau3 BankingSource | 16.5% | — | Not comparable |
| Toolathlon-VerifiedSource | — | 49.7% | Not comparable |
CodingLaguna S 2.1 wins6 benchmarks
| Benchmark | Gemini 3.5 Flash-Lite | Laguna S 2.1 | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 54.0% | 70.2% | Laguna S 2.1 leads |
| SWE-bench ProSource | 54.2% | 59.4% | Laguna S 2.1 leads |
| AA Coding IndexSource | 49.3% | — | Not comparable |
| AA-SciCodeSource | 40.9% | — | Not comparable |
| SWE MultilingualSource | — | 78.5% | Not comparable |
| deepSweSource | — | 40.4% | Not comparable |
Reasoning3 benchmarks
Knowledge6 benchmarks
| Benchmark | Gemini 3.5 Flash-Lite | Laguna S 2.1 | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 36.5% | — | Not comparable |
| AA-GPQA DiamondSource | 83.8% | — | Not comparable |
| AA-HLESource | 17.5% | — | Not comparable |
| AA-Omniscience IndexSource | 6.9% | — | Not comparable |
| AA-Omniscience AccuracySource | 30.3% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 33.5% | — | Not comparable |
Multimodal1 benchmarks
| Benchmark | Gemini 3.5 Flash-Lite | Laguna S 2.1 | Result |
|---|---|---|---|
| AA-MMMU-ProSource | 79.0% | — | Not comparable |
Frequently Asked Questions (3)
Which is better, Gemini 3.5 Flash-Lite or Laguna S 2.1?
Gemini 3.5 Flash-Lite and Laguna S 2.1 are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.
Which is better for coding, Gemini 3.5 Flash-Lite or Laguna S 2.1?
Laguna S 2.1 has the edge for coding in this comparison, averaging 59.4 versus 54.2. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, Gemini 3.5 Flash-Lite or Laguna S 2.1?
Laguna S 2.1 has the edge for agentic tasks in this comparison, averaging 70.2 versus 63.4. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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