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Gemini 3.5 Flash vs Laguna S 2.1

Gemini 3.5 Flash and Laguna S 2.1 are closely matched at 43.6 and 41.4 on the LLM Stats Score. Laguna S 2.1 is 27.0x cheaper per token.

Google · Poolside · Updated for 2026

Which is better?

Gemini 3.5 Flash and Laguna S 2.1 are closely matched on the overall LLM Stats Score at 43.6 and 41.4.

In the 3 individual benchmarks reported for both models, Laguna S 2.1 wins 2; this is a narrower head-to-head signal than the composite indexes.

On price, Laguna S 2.1 is roughly 27.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Gemini 3.5 Flash

  • you want predictable pricing at $1.50/M input and $9.00/M output

Choose Laguna S 2.1

  • you value its reported benchmark strengths — it wins 2 of 3 exact shared results
  • cost matters — it's about 27.0x cheaper per token
  • you want the most recent training data — it shipped Jul 2026
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Gemini 3.5 Flash
Google
Laguna S 2.1
Poolside
Core performance indexes
LLM Stats Score
43.6
#34
41.4
#43
Reasoning
44.4
#31
41.5
#40
Coding
33.8
#32
33.1
#37
Agents
31.5
#26
25.7
#43
Cost, coverage & limits
Benchmark wins
1 of 3
2 of 3
Input price
$1.50 / M
$0.10 / M
Output price
$9.00 / M
$0.20 / M
Context window
1,048,576
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Gemini 3.5 Flash
Laguna S 2.1
Tool use
31.5#10
18.9#56
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

16 reported for Gemini 3.5 Flash · 6 for Laguna S 2.1

3 shared

Gemini 3.5 Flash outperforms in 1 benchmarks (Toolathlon), while Laguna S 2.1 is better at 2 benchmarks (DeepSWE 1.1, SWE-Bench Pro).

Laguna S 2.1 shows notably better performance in the majority of benchmarks.

Fri Aug 28 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Laguna S 2.1 costs less

For input processing, Gemini 3.5 Flash ($1.50/1M tokens) is 15.0x more expensive than Laguna S 2.1 ($0.10/1M tokens).

For output processing, Gemini 3.5 Flash ($9.00/1M tokens) is 45.0x more expensive than Laguna S 2.1 ($0.20/1M tokens).

In conclusion, Gemini 3.5 Flash is more expensive than Laguna S 2.1.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Fri Aug 28 2026 • llm-stats.com
Google
Gemini 3.5 Flash
Input tokens$1.50
Output tokens$9.00
Best providerGoogle
Poolside
Laguna S 2.1
Input tokens$0.10
Output tokens$0.20
Best providerPoolside
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,048,576 tokens. Only Gemini 3.5 Flash specifies output context (65,536 tokens).

Google
Gemini 3.5 Flash
Input1,048,576 tokens
Output65,536 tokens
Poolside
Laguna S 2.1
Input1,048,576 tokens
Output- tokens
Fri Aug 28 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Gemini 3.5 Flash supports multimodal inputs, whereas Laguna S 2.1 does not.

Gemini 3.5 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 3.5 Flash

Text
Images
Audio
Video

Laguna S 2.1

Text
Images
Audio
Video

License

Usage and distribution terms

Gemini 3.5 Flash is licensed under a proprietary license, while Laguna S 2.1 uses OpenMDW License v1.1.

License differences may affect how you can use these models in commercial or open-source projects.

Gemini 3.5 Flash

Proprietary

Closed source

Laguna S 2.1

OpenMDW License v1.1

Open weights

Release Timeline

When each model was launched

Gemini 3.5 Flash was released on 2026-05-19, while Laguna S 2.1 was released on 2026-07-21.

Laguna S 2.1 is 2 months newer than Gemini 3.5 Flash.

Gemini 3.5 Flash

May 19, 2026

3 months ago

Laguna S 2.1

Jul 21, 2026

1 months ago

2mo newer

Knowledge Cutoff

When training data ends

Gemini 3.5 Flash has a documented knowledge cutoff of 2026-01-31, while Laguna S 2.1's cutoff date is not specified.

We can confirm Gemini 3.5 Flash's training data extends to 2026-01-31, but cannot make a direct comparison without Laguna S 2.1's cutoff date.

Gemini 3.5 Flash

Jan 2026

Laguna S 2.1

—

Provider Availability

Gemini 3.5 Flash is available from Google. Laguna S 2.1 is available from Poolside.

Gemini 3.5 Flash

google logo
Google
Input Price:Input: $1.50/1MOutput Price:Output: $9.00/1M

Laguna S 2.1

poolside logo
Poolside
Input Price:Input: $0.10/1MOutput Price:Output: $0.20/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Gemini 3.5 Flash and Laguna S 2.1 side-by-side, then vote on the output you prefer.

Gemini 3.5 Flash
✓ Preferred
Laguna S 2.1
Open in Playground

FAQ

Common questions about Gemini 3.5 Flash vs Laguna S 2.1.

Which is better, Gemini 3.5 Flash or Laguna S 2.1?

Gemini 3.5 Flash and Laguna S 2.1 are closely matched on the LLM Stats Score at 43.6 and 41.4. Gemini 3.5 Flash is made by Google and Laguna S 2.1 is made by Poolside. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemini 3.5 Flash compare to Laguna S 2.1 in benchmarks?

Gemini 3.5 Flash scores CharXiv-R: 84.2%, MCP Atlas: 83.6%, MMMU-Pro: 83.6%, OSWorld-Verified: 78.4%, Terminal-Bench 2.0: 76.2%. Laguna S 2.1 scores SWE-bench Multilingual: 78.5%, Terminal-Bench 2.1: 70.2%, SWE-Bench Pro: 59.4%, Toolathlon: 49.7%, SWE Atlas - Codebase QnA: 46.2%.

Is Gemini 3.5 Flash cheaper than Laguna S 2.1?

Laguna S 2.1 is 15.0x cheaper for input tokens. Gemini 3.5 Flash costs $1.50/M input and $9.00/M output via google. Laguna S 2.1 costs $0.10/M input and $0.20/M output via poolside.

What are the context window sizes for Gemini 3.5 Flash and Laguna S 2.1?

Gemini 3.5 Flash supports 1.0M tokens and Laguna S 2.1 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3.5 Flash and Laguna S 2.1?

Key differences include LLM Stats Score (43.6 vs 41.4), input pricing ($1.50 vs $0.10/M), multimodal support (yes vs no), licensing (Proprietary vs OpenMDW License v1.1). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.5 Flash and Laguna S 2.1?

Gemini 3.5 Flash is developed by Google and Laguna S 2.1 is developed by Poolside.

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