Model Comparison

GPT OSS 20B vs Nova Pro

Both models are evenly matched across the benchmarks. GPT OSS 20B is 16.0x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GPT OSS 20B outperforms in 1 benchmarks (GPQA), while Nova Pro is better at 1 benchmark (MMLU).

Both models are evenly matched across the benchmarks.

Tue Apr 14 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 16.0x cheaper than Nova Pro ($0.80/1M tokens).

For output processing, GPT OSS 20B ($0.20/1M tokens) is 16.0x cheaper than Nova Pro ($3.20/1M tokens).

In conclusion, Nova Pro is more expensive than GPT OSS 20B.*

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

Lowest available price from all providers
Tue Apr 14 2026 • llm-stats.com
OpenAI
GPT OSS 20B
Input tokens$0.05
Output tokens$0.20
Best providerNovita
Amazon
Nova Pro
Input tokens$0.80
Output tokens$3.20
Best providerAWS Bedrock
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Nova Pro accepts 300,000 input tokens compared to GPT OSS 20B's 131,072 tokens. Nova Pro can generate longer responses up to 300,000 tokens, while GPT OSS 20B is limited to 32,768 tokens.

OpenAI
GPT OSS 20B
Input131,072 tokens
Output32,768 tokens
Amazon
Nova Pro
Input300,000 tokens
Output300,000 tokens
Tue Apr 14 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Nova Pro supports multimodal inputs, whereas GPT OSS 20B does not.

Nova Pro can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT OSS 20B

Text
Images
Audio
Video

Nova Pro

Text
Images
Audio
Video

License

Usage and distribution terms

GPT OSS 20B is licensed under Apache 2.0, while Nova Pro uses a proprietary license.

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

GPT OSS 20B

Apache 2.0

Open weights

Nova Pro

Proprietary

Closed source

Release Timeline

When each model was launched

GPT OSS 20B was released on 2025-08-05, while Nova Pro was released on 2024-11-20.

GPT OSS 20B is 9 months newer than Nova Pro.

GPT OSS 20B

Aug 5, 2025

8 months ago

8mo newer
Nova Pro

Nov 20, 2024

1.4 years ago

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

GPT OSS 20B is available from Novita, Fireworks, Groq, OpenAI. Nova Pro is available from Bedrock.

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

Nova Pro

bedrock logo
AWS Bedrock
Input Price:Input: $0.80/1MOutput Price:Output: $3.20/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher GPQA score (71.5% vs 46.9%)
Amazon
Larger context window (300,000 tokens)
Supports multimodal inputs
Higher MMLU score (85.9% vs 85.3%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT OSS 20B
Amazon
Nova Pro

FAQ

Common questions about GPT OSS 20B vs Nova Pro

Both models are evenly matched across the benchmarks. GPT OSS 20B is made by OpenAI and Nova Pro is made by Amazon. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
GPT OSS 20B scores MMLU: 85.3%, CodeForces: 74.3%, GPQA: 71.5%, TAU-bench Retail: 54.8%, HealthBench: 42.5%. Nova Pro scores ARC-C: 94.8%, GSM8k: 94.8%, DocVQA: 93.5%, IFEval: 92.1%, ChartQA: 89.2%.
GPT OSS 20B is 16.0x cheaper for input tokens. GPT OSS 20B costs $0.05/M input and $0.20/M output via novita. Nova Pro costs $0.80/M input and $3.20/M output via bedrock.
GPT OSS 20B supports 131K tokens and Nova Pro supports 300K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (131K vs 300K), input pricing ($0.05 vs $0.80/M), multimodal support (no vs yes), licensing (Apache 2.0 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.
GPT OSS 20B is developed by OpenAI and Nova Pro is developed by Amazon.