Model Comparison

Gemma 3 27B vs GPT OSS 20BWhich is better in 2026?

GPT OSS 20B significantly outperforms across most benchmarks. GPT OSS 20B is 1.4x cheaper per token.

Verdict: Gemma 3 27B vs GPT OSS 20B — which is better?

Gemma 3 27B (by Google) and GPT OSS 20B (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 3 27B outperforms in 0 benchmarks, while GPT OSS 20B is better at 1 benchmark (GPQA). GPT OSS 20B significantly outperforms across most benchmarks.

On price, GPT OSS 20B is roughly 1.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose Gemma 3 27B if…

  • you want predictable pricing at $0.10/M input and $0.20/M output

Choose GPT OSS 20B if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • cost matters — it's about 1.4x cheaper per token
  • you want the most recent training data — it shipped Aug 2025
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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

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

GPT OSS 20B significantly outperforms across most benchmarks.

Sun Jun 21 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT OSS 20B costs less

For input processing, Gemma 3 27B ($0.10/1M tokens) is 2.0x more expensive than GPT OSS 20B ($0.05/1M tokens).

For output processing, Gemma 3 27B ($0.20/1M tokens) costs the same as GPT OSS 20B ($0.20/1M tokens).

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

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

Lowest available price from all providers
Sun Jun 21 2026 • llm-stats.com
Google
Gemma 3 27B
Input tokens$0.10
Output tokens$0.20
Best providerDeepinfra
OpenAI
GPT OSS 20B
Input tokens$0.05
Output tokens$0.20
Best providerNovita
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, making it 29.2% larger.

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

Context Window

Maximum input and output token capacity

Both models have the same input context window of 131,072 tokens. Gemma 3 27B can generate longer responses up to 131,072 tokens, while GPT OSS 20B is limited to 32,768 tokens.

Google
Gemma 3 27B
Input131,072 tokens
Output131,072 tokens
OpenAI
GPT OSS 20B
Input131,072 tokens
Output32,768 tokens
Sun Jun 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Gemma 3 27B supports multimodal inputs, whereas GPT OSS 20B 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

Text
Images
Audio
Video

License

Usage and distribution terms

Gemma 3 27B is licensed under Gemma, while GPT OSS 20B 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

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 was released on 2025-08-05.

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

Gemma 3 27B

Mar 12, 2025

1.3 years ago

GPT OSS 20B

Aug 5, 2025

10 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 is available from Novita, Fireworks, Groq, 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

novita logo
Novita
Input Price:Input: $0.05/1MOutput Price:Output: $0.20/1M
fireworks logo
Fireworks
Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M
groq logo
Groq
Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M
openai logo
OpenAI
Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Supports multimodal inputs
OpenAI
Less expensive input tokens
Higher GPQA score (71.5% vs 42.4%)

Detailed Comparison

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

FAQ

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

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

GPT OSS 20B significantly outperforms across most benchmarks. Gemma 3 27B is made by Google and GPT OSS 20B 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 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 scores MMLU: 85.3%, CodeForces: 74.3%, GPQA: 71.5%, TAU-bench Retail: 54.8%, HealthBench: 42.5%.

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

GPT OSS 20B is 2.0x cheaper for input tokens. Gemma 3 27B costs $0.10/M input and $0.20/M output via deepinfra. GPT OSS 20B costs $0.05/M input and $0.20/M output via novita.

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

Gemma 3 27B supports 131K tokens and GPT OSS 20B 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?

Key differences include input pricing ($0.10 vs $0.05/M), 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?

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

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