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Gemma 2 27B vs GPT-5.1 Thinking

GPT-5.1 Thinking leads the LLM Stats Score 36.6 to -0.7.

Google · OpenAI · Updated for 2026

Which is better?

GPT-5.1 Thinking leads the overall LLM Stats Score 36.6 to -0.7, ranking #73 overall.

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

Choose Gemma 2 27B

  • you need open weights you can self-host or fine-tune

Choose GPT-5.1 Thinking

  • overall performance matters — it scores 36.6 and ranks #73 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Nov 2025

At a glance

The differences that matter most.

Gemma 2 27B
Google
GPT-5.1 Thinking
OpenAI
Core performance indexes
LLM Stats Score
-0.7
#329
36.6
#73
Reasoning
-1.1
#325
36.3
#72
Coding
-7.9
#262
21.6
#85
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$1.25 / M
Output price
— / M
$10.00 / M
Context window
—
400,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Gemma 2 27B
GPT-5.1 Thinking
Math
-0.7#297
30.0#78
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

16 reported for Gemma 2 27B · 9 for GPT-5.1 Thinking

No common benchmarks found

Gemma 2 27B and GPT-5.1 Thinkingdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only GPT-5.1 Thinking specifies input context (400,000 tokens). Only GPT-5.1 Thinking specifies output context (128,000 tokens).

Google
Gemma 2 27B
Input- tokens
Output- tokens
OpenAI
GPT-5.1 Thinking
Input400,000 tokens
Output128,000 tokens
Mon Sep 14 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

GPT-5.1 Thinking supports multimodal inputs, whereas Gemma 2 27B does not.

GPT-5.1 Thinking can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemma 2 27B

Text
Images
Audio
Video

GPT-5.1 Thinking

Text
Images
Audio
Video

License

Usage and distribution terms

Gemma 2 27B is licensed under Gemma, while GPT-5.1 Thinking 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-5.1 Thinking

Proprietary

Closed source

Release Timeline

When each model was launched

Gemma 2 27B was released on 2024-06-27, while GPT-5.1 Thinking was released on 2025-11-12.

GPT-5.1 Thinking is 17 months newer than Gemma 2 27B.

Gemma 2 27B

Jun 27, 2024

2.2 years ago

GPT-5.1 Thinking

Nov 12, 2025

10 months ago

1.4yr 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→

Judge for yourself.

Run your own prompts against Gemma 2 27B and GPT-5.1 Thinking side-by-side, then vote on the output you prefer.

Gemma 2 27B
✓ Preferred
GPT-5.1 Thinking
Open in Playground

FAQ

Common questions about Gemma 2 27B vs GPT-5.1 Thinking.

Which is better, Gemma 2 27B or GPT-5.1 Thinking?

GPT-5.1 Thinking leads the LLM Stats Score 36.6 to -0.7. Gemma 2 27B is made by Google and GPT-5.1 Thinking is made by OpenAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemma 2 27B compare to GPT-5.1 Thinking in benchmarks?

Gemma 2 27B scores ARC-E: 88.6%, HellaSwag: 86.4%, BoolQ: 84.8%, TriviaQA: 83.7%, Winogrande: 83.7%. GPT-5.1 Thinking scores Tau2 Telecom: 95.6%, AIME 2025: 94.0%, BrowseComp Long Context 128k: 90.0%, GPQA: 88.1%, MMMU: 85.4%.

What are the context window sizes for Gemma 2 27B and GPT-5.1 Thinking?

Gemma 2 27B supports an unknown number of tokens and GPT-5.1 Thinking supports 400K 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-5.1 Thinking?

Key differences include LLM Stats Score (-0.7 vs 36.6), multimodal support (no vs yes), licensing (Gemma vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemma 2 27B and GPT-5.1 Thinking?

Gemma 2 27B is developed by Google and GPT-5.1 Thinking is developed by OpenAI.

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