Model Comparison

GPT OSS 20B vs Nemotron 3 Nano (30B A3B)

Nemotron 3 Nano (30B A3B) significantly outperforms across most benchmarks. GPT OSS 20B is 1.2x cheaper per token.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GPT OSS 20B outperforms in 0 benchmarks, while Nemotron 3 Nano (30B A3B) is better at 2 benchmarks (GPQA, Humanity's Last Exam).

Nemotron 3 Nano (30B A3B) significantly outperforms across most benchmarks.

Fri May 22 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT OSS 20B costs less

For input processing, GPT OSS 20B ($0.05/1M tokens) is 1.2x cheaper than Nemotron 3 Nano (30B A3B) ($0.06/1M tokens).

For output processing, GPT OSS 20B ($0.20/1M tokens) is 1.2x cheaper than Nemotron 3 Nano (30B A3B) ($0.24/1M tokens).

In conclusion, Nemotron 3 Nano (30B A3B) is more expensive than GPT OSS 20B.*

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

Lowest available price from all providers

Fri May 22 2026 • llm-stats.com

GPT OSS 20B

Input tokens$0.05

Output tokens$0.20

Best providerNovita

Nemotron 3 Nano (30B A3B)

Input tokens$0.06

Output tokens$0.24

Best providerDeepinfra

Notice missing or incorrect data?Start an Issue→

Model Size

Parameter count comparison

11.1B diff

Nemotron 3 Nano (30B A3B) has 11.1B more parameters than GPT OSS 20B, making it 53.1% larger.

GPT OSS 20B

20.9Bparameters

Nemotron 3 Nano (30B A3B)

32.0Bparameters

20.9B

GPT OSS 20B

32.0B

Nemotron 3 Nano (30B A3B)

Context Window

Maximum input and output token capacity

Nemotron 3 Nano (30B A3B) accepts 262,144 input tokens compared to GPT OSS 20B's 131,072 tokens. Nemotron 3 Nano (30B A3B) can generate longer responses up to 262,144 tokens, while GPT OSS 20B is limited to 32,768 tokens.

GPT OSS 20B

Input131,072 tokens

Output32,768 tokens

Nemotron 3 Nano (30B A3B)

Input262,144 tokens

Output262,144 tokens

Fri May 22 2026 • llm-stats.com

License

Usage and distribution terms

GPT OSS 20B is licensed under Apache 2.0, while Nemotron 3 Nano (30B A3B) uses NVIDIA Open Model License Agreement .

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

GPT OSS 20B

Apache 2.0

Open weights

Nemotron 3 Nano (30B A3B)

NVIDIA Open Model License Agreement

Open weights

Release Timeline

When each model was launched

GPT OSS 20B was released on 2025-08-05, while Nemotron 3 Nano (30B A3B) was released on 2025-12-15.

Nemotron 3 Nano (30B A3B) is 4 months newer than GPT OSS 20B.

GPT OSS 20B

Aug 5, 2025

9 months ago

Nemotron 3 Nano (30B A3B)

Dec 15, 2025

5 months ago

4mo newer

Knowledge Cutoff

When training data ends

Nemotron 3 Nano (30B A3B) has a documented knowledge cutoff of 2025-11-28, while GPT OSS 20B's cutoff date is not specified.

We can confirm Nemotron 3 Nano (30B A3B)'s training data extends to 2025-11-28, but cannot make a direct comparison without GPT OSS 20B's cutoff date.

GPT OSS 20B

—

Nemotron 3 Nano (30B A3B)

Nov 2025

Provider Availability

GPT OSS 20B is available from Novita, Fireworks, Groq, OpenAI. Nemotron 3 Nano (30B A3B) is available from DeepInfra.

GPT OSS 20B

Novita

Input Price:Input: $0.05/1MOutput Price:Output: $0.20/1M

Fireworks

Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M

Groq

Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M

OpenAI

Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M

Nemotron 3 Nano (30B A3B)

Deepinfra

Input Price:Input: $0.06/1MOutput Price:Output: $0.24/1M

* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

GPT OSS 20B

View details

OpenAI

Less expensive input tokens

Less expensive output tokens

Nemotron 3 Nano (30B A3B)

View details

NVIDIA

Larger context window (262,144 tokens)

Higher GPQA score (75.0% vs 71.5%)

Higher Humanity's Last Exam score (15.5% vs 10.9%)

Detailed Comparison

AI Model Comparison Table
Feature	GPT OSS 20B	Nemotron 3 Nano (30B A3B)

FAQ

Common questions about GPT OSS 20B vs Nemotron 3 Nano (30B A3B).

Which is better, GPT OSS 20B or Nemotron 3 Nano (30B A3B)?

Nemotron 3 Nano (30B A3B) significantly outperforms across most benchmarks. GPT OSS 20B is made by OpenAI and Nemotron 3 Nano (30B A3B) is made by NVIDIA. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT OSS 20B compare to Nemotron 3 Nano (30B A3B) in benchmarks?

GPT OSS 20B scores MMLU: 85.3%, CodeForces: 74.3%, GPQA: 71.5%, TAU-bench Retail: 54.8%, HealthBench: 42.5%. Nemotron 3 Nano (30B A3B) scores AIME 2025: 99.2%, WMT24++: 86.2%, MMLU-Pro: 78.3%, GPQA: 75.0%, LiveCodeBench v6: 68.3%.

Is GPT OSS 20B cheaper than Nemotron 3 Nano (30B A3B)?

GPT OSS 20B is 1.2x cheaper for input tokens. GPT OSS 20B costs $0.05/M input and $0.20/M output via novita. Nemotron 3 Nano (30B A3B) costs $0.06/M input and $0.24/M output via deepinfra.

What are the context window sizes for GPT OSS 20B and Nemotron 3 Nano (30B A3B)?

GPT OSS 20B supports 131K tokens and Nemotron 3 Nano (30B A3B) supports 262K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT OSS 20B and Nemotron 3 Nano (30B A3B)?

Key differences include context window (131K vs 262K), input pricing ($0.05 vs $0.06/M), licensing (Apache 2.0 vs NVIDIA Open Model License Agreement ). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT OSS 20B and Nemotron 3 Nano (30B A3B)?

GPT OSS 20B is developed by OpenAI and Nemotron 3 Nano (30B A3B) is developed by NVIDIA.