Laguna S 2.1 vs Solar Pro 4

Laguna S 2.1 and Solar Pro 4 are closely matched at 41.4 and 36.0 on the LLM Stats Score. Laguna S 2.1 is 4.2x cheaper per token.

Poolside · Upstage · Updated for 2026

Which is better?

Laguna S 2.1 and Solar Pro 4 are closely matched on the overall LLM Stats Score at 41.4 and 36.0.

In the 1 individual benchmarks reported for both models, Laguna S 2.1 wins 1; this is a narrower head-to-head signal than the composite indexes.

On price, Laguna S 2.1 is roughly 4.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Laguna S 2.1 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

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

Choose Laguna S 2.1

your work emphasizes reasoning and coding — it leads those capability indexes
you value its reported benchmark strengths — it wins 1 of 1 exact shared results
cost matters — it's about 4.2x cheaper per token
you process long inputs — it offers a 1,048,576 token context window
you need open weights you can self-host or fine-tune

Choose Solar Pro 4

you want the most recent training data — it shipped Aug 2026

At a glance

The differences that matter most.

Better token value: Laguna S 2.1

Core performance indexes

LLM Stats Score

41.4

#43 · 5 evals

Best

36.0

#72 · 9 evals

Reasoning

41.5

#40 · 4 evals

Best

35.6

#71 · 9 evals

Coding

33.1

#37 · 4 evals

Best

22.1

#73 · 3 evals

Agents

25.7

#43 · 4 evals

Best

13.8

#84 · 3 evals

Cost, coverage & limits

Benchmark wins

1 of 1

Best

0 of 1

Input price

$0.10 / M

Best

$0.30 / M

Output price

$0.20 / M

Best

$1.20 / M

Context window

1,048,576

Best

524,288

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared

Index

Laguna S 2.1

Solar Pro 4

Tool use

18.9#56 · 2 evals

15.3#81 · 2 evals

Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

6 reported for Laguna S 2.1 · 9 for Solar Pro 4

1 shared

Laguna S 2.1 outperforms in 1 benchmarks (Terminal-Bench 2.1), while Solar Pro 4 is better at 0 benchmarks.

Laguna S 2.1 significantly outperforms across most 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, Laguna S 2.1 ($0.10/1M tokens) is 3.0x cheaper than Solar Pro 4 ($0.30/1M tokens).

For output processing, Laguna S 2.1 ($0.20/1M tokens) is 6.0x cheaper than Solar Pro 4 ($1.20/1M tokens).

In conclusion, Solar Pro 4 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

Laguna S 2.1

Input tokens$0.10

Output tokens$0.20

Best providerPoolside

Solar Pro 4

Input tokens$0.30

Output tokens$1.20

Best providerUnknown Organization

Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Laguna S 2.1 accepts 1,048,576 input tokens compared to Solar Pro 4's 524,288 tokens. Only Solar Pro 4 specifies output context (131,072 tokens).

Laguna S 2.1

Input1,048,576 tokens

Output- tokens

Solar Pro 4

Input524,288 tokens

Output131,072 tokens

Fri Aug 28 2026 • llm-stats.com

License

Usage and distribution terms

Laguna S 2.1 is licensed under OpenMDW License v1.1, while Solar Pro 4 uses a proprietary license.

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

Laguna S 2.1

OpenMDW License v1.1

Open weights

Solar Pro 4

Proprietary

Closed source

Release Timeline

When each model was launched

Laguna S 2.1 was released on 2026-07-21, while Solar Pro 4 was released on 2026-08-06.

Solar Pro 4 is 1 month newer than Laguna S 2.1.

Laguna S 2.1

Jul 21, 2026

1 months ago

Solar Pro 4

Aug 6, 2026

3 weeks ago

2w newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Laguna S 2.1 is available from Poolside. Solar Pro 4 is available from Upstage.

Laguna S 2.1

Poolside

Input Price:Input: $0.10/1MOutput Price:Output: $0.20/1M

Solar Pro 4

Unknown Organization

Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M

* 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 Laguna S 2.1 and Solar Pro 4 side-by-side, then vote on the output you prefer.

Laguna S 2.1

✓ Preferred

Solar Pro 4

Open in Playground

FAQ

Common questions about Laguna S 2.1 vs Solar Pro 4.

Which is better, Laguna S 2.1 or Solar Pro 4?

Laguna S 2.1 and Solar Pro 4 are closely matched on the LLM Stats Score at 41.4 and 36.0. Laguna S 2.1 is made by Poolside and Solar Pro 4 is made by Upstage. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Laguna S 2.1 compare to Solar Pro 4 in benchmarks?

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%. Solar Pro 4 scores AIME 2026: 95.3%, GPQA: 89.0%, LiveCodeBench: 87.8%, MMLU-Pro: 86.3%, AA-LCR: 71.0%.

Is Laguna S 2.1 cheaper than Solar Pro 4?

Laguna S 2.1 is 3.0x cheaper for input tokens. Laguna S 2.1 costs $0.10/M input and $0.20/M output via poolside. Solar Pro 4 costs $0.30/M input and $1.20/M output via upstage.

What are the context window sizes for Laguna S 2.1 and Solar Pro 4?

Laguna S 2.1 supports 1.0M tokens and Solar Pro 4 supports 524K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Laguna S 2.1 and Solar Pro 4?

Key differences include LLM Stats Score (41.4 vs 36.0), context window (1.0M vs 524K), input pricing ($0.10 vs $0.30/M), licensing (OpenMDW License v1.1 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Laguna S 2.1 and Solar Pro 4?

Laguna S 2.1 is developed by Poolside and Solar Pro 4 is developed by Upstage.

Laguna S 2.1 vs Solar Pro 4