Model Comparison

Gemma 2 27B vs o1-preview

o1-preview significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Gemma 2 27B outperforms in 0 benchmarks, while o1-preview is better at 2 benchmarks (MATH, MMLU).

o1-preview significantly outperforms across most benchmarks.

Fri Jun 05 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only o1-preview specifies input context (128,000 tokens). Only o1-preview specifies output context (32,768 tokens).

Google
Gemma 2 27B
Input- tokens
Output- tokens
OpenAI
o1-preview
Input128,000 tokens
Output32,768 tokens
Fri Jun 05 2026 • llm-stats.com

License

Usage and distribution terms

Gemma 2 27B is licensed under Gemma, while o1-preview uses a proprietary license.

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

Gemma 2 27B

Gemma

Open weights

o1-preview

Proprietary

Closed source

Release Timeline

When each model was launched

Gemma 2 27B was released on 2024-06-27, while o1-preview was released on 2024-09-12.

o1-preview is 3 months newer than Gemma 2 27B.

Gemma 2 27B

Jun 27, 2024

1.9 years ago

o1-preview

Sep 12, 2024

1.7 years ago

2mo 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

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Has open weights
OpenAI
Larger context window (128,000 tokens)
Higher MATH score (85.5% vs 42.3%)
Higher MMLU score (90.8% vs 75.2%)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemma 2 27B
OpenAI
o1-preview

FAQ

Common questions about Gemma 2 27B vs o1-preview.

Which is better, Gemma 2 27B or o1-preview?

o1-preview significantly outperforms across most benchmarks. Gemma 2 27B is made by Google and o1-preview is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemma 2 27B compare to o1-preview in benchmarks?

Gemma 2 27B scores ARC-E: 88.6%, HellaSwag: 86.4%, BoolQ: 84.8%, TriviaQA: 83.7%, Winogrande: 83.7%. o1-preview scores MGSM: 90.8%, MMLU: 90.8%, MATH: 85.5%, GPQA: 73.3%, LiveBench: 52.3%.

What are the context window sizes for Gemma 2 27B and o1-preview?

Gemma 2 27B supports an unknown number of tokens and o1-preview supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemma 2 27B and o1-preview?

Key differences include licensing (Gemma vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemma 2 27B and o1-preview?

Gemma 2 27B is developed by Google and o1-preview is developed by OpenAI.