Model Comparison

Gemma 3 27B vs GPT OSS 20B High

GPT OSS 20B High significantly outperforms across most benchmarks. Gemma 3 27B is 1.6x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemma 3 27B outperforms in 0 benchmarks, while GPT OSS 20B High is better at 1 benchmark (GPQA).

GPT OSS 20B High significantly outperforms across most benchmarks.

Fri May 29 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemma 3 27B costs less

For input processing, Gemma 3 27B ($0.10/1M tokens) costs the same as GPT OSS 20B High ($0.10/1M tokens).

For output processing, Gemma 3 27B ($0.20/1M tokens) is 2.5x cheaper than GPT OSS 20B High ($0.50/1M tokens).

In conclusion, GPT OSS 20B High is more expensive than Gemma 3 27B.*

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

Lowest available price from all providers
Fri May 29 2026 • llm-stats.com
Google
Gemma 3 27B
Input tokens$0.10
Output tokens$0.20
Best providerDeepinfra
OpenAI
GPT OSS 20B High
Input tokens$0.10
Output tokens$0.50
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Model Size

Parameter count comparison

6.1B diff

Gemma 3 27B has 6.1B more parameters than GPT OSS 20B High, making it 29.2% larger.

Google
Gemma 3 27B
27.0Bparameters
OpenAI
GPT OSS 20B High
20.9Bparameters
27.0B
Gemma 3 27B
20.9B
GPT OSS 20B High

Context Window

Maximum input and output token capacity

Both models have the same input context window of 131,072 tokens. Both models can generate responses up to 131,072 tokens.

Google
Gemma 3 27B
Input131,072 tokens
Output131,072 tokens
OpenAI
GPT OSS 20B High
Input131,072 tokens
Output131,072 tokens
Fri May 29 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Gemma 3 27B supports multimodal inputs, whereas GPT OSS 20B High does not.

Gemma 3 27B can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemma 3 27B

Text
Images
Audio
Video

GPT OSS 20B High

Text
Images
Audio
Video

License

Usage and distribution terms

Gemma 3 27B is licensed under Gemma, while GPT OSS 20B High uses Apache 2.0.

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

Gemma 3 27B

Gemma

Open weights

GPT OSS 20B High

Apache 2.0

Open weights

Release Timeline

When each model was launched

Gemma 3 27B was released on 2025-03-12, while GPT OSS 20B High was released on 2025-08-05.

GPT OSS 20B High is 5 months newer than Gemma 3 27B.

Gemma 3 27B

Mar 12, 2025

1.2 years ago

GPT OSS 20B High

Aug 5, 2025

9 months ago

4mo 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

Gemma 3 27B is available from DeepInfra, Novita. GPT OSS 20B High is available from OpenAI.

Gemma 3 27B

deepinfra logo
Deepinfra
Input Price:Input: $0.10/1MOutput Price:Output: $0.20/1M
novita logo
Novita
Input Price:Input: $0.11/1MOutput Price:Output: $0.20/1M

GPT OSS 20B High

openai logo
OpenAI
Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Google
Supports multimodal inputs
Less expensive output tokens
OpenAI
Higher GPQA score (74.2% vs 42.4%)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemma 3 27B
OpenAI
GPT OSS 20B High

FAQ

Common questions about Gemma 3 27B vs GPT OSS 20B High.

Which is better, Gemma 3 27B or GPT OSS 20B High?

GPT OSS 20B High significantly outperforms across most benchmarks. Gemma 3 27B is made by Google and GPT OSS 20B High is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemma 3 27B compare to GPT OSS 20B High in benchmarks?

Gemma 3 27B scores GSM8k: 95.9%, IFEval: 90.4%, MATH: 89.0%, HumanEval: 87.8%, BIG-Bench Hard: 87.6%. GPT OSS 20B High scores AIME 2025: 98.7%, GPQA: 74.2%.

Is Gemma 3 27B cheaper than GPT OSS 20B High?

Both models cost $0.10 per million input tokens.

What are the context window sizes for Gemma 3 27B and GPT OSS 20B High?

Gemma 3 27B supports 131K tokens and GPT OSS 20B High supports 131K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemma 3 27B and GPT OSS 20B High?

Key differences include multimodal support (yes vs no), licensing (Gemma vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemma 3 27B and GPT OSS 20B High?

Gemma 3 27B is developed by Google and GPT OSS 20B High is developed by OpenAI.