Model Comparison

Gemma 3 1B vs GPT OSS 120BWhich is better in 2026?

GPT OSS 120B significantly outperforms across most benchmarks.

Verdict: Gemma 3 1B vs GPT OSS 120B — which is better?

Gemma 3 1B (by Google) and GPT OSS 120B (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 1B outperforms in 0 benchmarks, while GPT OSS 120B is better at 1 benchmark (GPQA). GPT OSS 120B significantly outperforms across most benchmarks.

Choose Gemma 3 1B if…

  • you are already invested in the Google ecosystem

Choose GPT OSS 120B if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Aug 2025

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemma 3 1B outperforms in 0 benchmarks, while GPT OSS 120B is better at 1 benchmark (GPQA).

GPT OSS 120B significantly outperforms across most benchmarks.

Sun Jul 26 2026 • llm-stats.com

Arena Performance

Human preference votes

Model Size

Parameter count comparison

115.8B diff

GPT OSS 120B has 115.8B more parameters than Gemma 3 1B, making it 11580.0% larger.

Google
Gemma 3 1B
1.0Bparameters
OpenAI
GPT OSS 120B
116.8Bparameters
1.0B
Gemma 3 1B
116.8B
GPT OSS 120B

Context Window

Maximum input and output token capacity

Only GPT OSS 120B specifies input context (131,072 tokens). Only GPT OSS 120B specifies output context (131,072 tokens).

Google
Gemma 3 1B
Input- tokens
Output- tokens
OpenAI
GPT OSS 120B
Input131,072 tokens
Output131,072 tokens
Sun Jul 26 2026 • llm-stats.com

License

Usage and distribution terms

Gemma 3 1B is licensed under Gemma, while GPT OSS 120B uses Apache 2.0.

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

Gemma 3 1B

Gemma

Open weights

GPT OSS 120B

Apache 2.0

Open weights

Release Timeline

When each model was launched

Gemma 3 1B was released on 2025-03-12, while GPT OSS 120B was released on 2025-08-05.

GPT OSS 120B is 5 months newer than Gemma 3 1B.

Gemma 3 1B

Mar 12, 2025

1.4 years ago

GPT OSS 120B

Aug 5, 2025

11 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

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google

No standout differentiators in the data we have for this pair.

OpenAI
Larger context window (131,072 tokens)
Higher GPQA score (80.1% vs 19.2%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemma 3 1B and GPT OSS 120B side-by-side, then vote on the output you prefer.

Gemma 3 1B
✓ Preferred
GPT OSS 120B
Open in Playground
AI Model Comparison Table
Feature
Google
Gemma 3 1B
OpenAI
GPT OSS 120B

FAQ

Common questions about Gemma 3 1B vs GPT OSS 120B.

Which is better, Gemma 3 1B or GPT OSS 120B?

GPT OSS 120B significantly outperforms across most benchmarks. Gemma 3 1B is made by Google and GPT OSS 120B is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemma 3 1B compare to GPT OSS 120B in benchmarks?

Gemma 3 1B scores IFEval: 80.2%, GSM8k: 62.8%, Natural2Code: 56.0%, MATH: 48.0%, HumanEval: 41.5%. GPT OSS 120B scores MMLU: 90.0%, CodeForces: 82.1%, GPQA: 80.1%, TAU-bench Retail: 67.8%, HealthBench: 57.6%.

What are the context window sizes for Gemma 3 1B and GPT OSS 120B?

Gemma 3 1B supports an unknown number of tokens and GPT OSS 120B 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 1B and GPT OSS 120B?

Key differences include licensing (Gemma vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemma 3 1B and GPT OSS 120B?

Gemma 3 1B is developed by Google and GPT OSS 120B is developed by OpenAI.

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