Model Comparison

Gemma 2 27B vs GPT-3.5 TurboWhich is better in 2026?

GPT-3.5 Turbo shows notably better performance in the majority of benchmarks.

Verdict: Gemma 2 27B vs GPT-3.5 Turbo — which is better?

Gemma 2 27B (by Google) and GPT-3.5 Turbo (by OpenAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Gemma 2 27B outperforms in 1 benchmarks (MMLU), while GPT-3.5 Turbo is better at 2 benchmarks (HumanEval, MATH). GPT-3.5 Turbo shows notably better performance in the majority of benchmarks.

Choose Gemma 2 27B if…

  • you want the most recent training data — it shipped Jun 2024
  • you need open weights you can self-host or fine-tune

Choose GPT-3.5 Turbo if…

  • you want the strongest raw capability — it leads on 2 of 3 shared benchmarks
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Gemma 2 27B outperforms in 1 benchmarks (MMLU), while GPT-3.5 Turbo is better at 2 benchmarks (HumanEval, MATH).

GPT-3.5 Turbo shows notably better performance in the majority of benchmarks.

Wed Jun 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT-3.5 Turbo specifies input context (16,385 tokens). Only GPT-3.5 Turbo specifies output context (4,096 tokens).

Google
Gemma 2 27B
Input- tokens
Output- tokens
OpenAI
GPT-3.5 Turbo
Input16,385 tokens
Output4,096 tokens
Wed Jun 17 2026 • llm-stats.com

License

Usage and distribution terms

Gemma 2 27B is licensed under Gemma, while GPT-3.5 Turbo 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

GPT-3.5 Turbo

Proprietary

Closed source

Release Timeline

When each model was launched

Gemma 2 27B was released on 2024-06-27, while GPT-3.5 Turbo was released on 2023-03-21.

Gemma 2 27B is 15 months newer than GPT-3.5 Turbo.

Gemma 2 27B

Jun 27, 2024

2.0 years ago

1.3yr newer
GPT-3.5 Turbo

Mar 21, 2023

3.2 years ago

Knowledge Cutoff

When training data ends

GPT-3.5 Turbo has a documented knowledge cutoff of 2021-09-30, while Gemma 2 27B's cutoff date is not specified.

We can confirm GPT-3.5 Turbo's training data extends to 2021-09-30, but cannot make a direct comparison without Gemma 2 27B's cutoff date.

Gemma 2 27B

—

GPT-3.5 Turbo

Sep 2021

Outputs Comparison

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Key Takeaways

Google
Has open weights
Higher MMLU score (75.2% vs 69.8%)
OpenAI
Larger context window (16,385 tokens)
Higher HumanEval score (68.0% vs 51.8%)
Higher MATH score (43.1% vs 42.3%)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemma 2 27B
OpenAI
GPT-3.5 Turbo

FAQ

Common questions about Gemma 2 27B vs GPT-3.5 Turbo.

Which is better, Gemma 2 27B or GPT-3.5 Turbo?

GPT-3.5 Turbo shows notably better performance in the majority of benchmarks. Gemma 2 27B is made by Google and GPT-3.5 Turbo 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 GPT-3.5 Turbo in benchmarks?

Gemma 2 27B scores ARC-E: 88.6%, HellaSwag: 86.4%, BoolQ: 84.8%, TriviaQA: 83.7%, Winogrande: 83.7%. GPT-3.5 Turbo scores DROP: 70.2%, MMLU: 69.8%, HumanEval: 68.0%, MGSM: 56.3%, MATH: 43.1%.

What are the context window sizes for Gemma 2 27B and GPT-3.5 Turbo?

Gemma 2 27B supports an unknown number of tokens and GPT-3.5 Turbo supports 16K 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 GPT-3.5 Turbo?

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

Who makes Gemma 2 27B and GPT-3.5 Turbo?

Gemma 2 27B is developed by Google and GPT-3.5 Turbo is developed by OpenAI.

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