Model Comparison

Gemini 3 Flash vs GPT OSS 20B

Gemini 3 Flash significantly outperforms across most benchmarks. GPT OSS 20B is 12.9x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

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

Gemini 3 Flash significantly outperforms across most benchmarks.

Thu May 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, Gemini 3 Flash ($0.50/1M tokens) is 10.0x more expensive than GPT OSS 20B ($0.05/1M tokens).

For output processing, Gemini 3 Flash ($3.00/1M tokens) is 15.0x more expensive than GPT OSS 20B ($0.20/1M tokens).

In conclusion, Gemini 3 Flash is more expensive than GPT OSS 20B.*

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

Lowest available price from all providers

Thu May 14 2026 • llm-stats.com

Gemini 3 Flash

Input tokens$0.50

Output tokens$3.00

Best providerGoogle

GPT OSS 20B

Input tokens$0.05

Output tokens$0.20

Best providerNovita

Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 3 Flash accepts 1,000,000 input tokens compared to GPT OSS 20B's 131,072 tokens. Gemini 3 Flash can generate longer responses up to 65,536 tokens, while GPT OSS 20B is limited to 32,768 tokens.

Gemini 3 Flash

Input1,000,000 tokens

Output65,536 tokens

GPT OSS 20B

Input131,072 tokens

Output32,768 tokens

Thu May 14 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Gemini 3 Flash supports multimodal inputs, whereas GPT OSS 20B does not.

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

Gemini 3 Flash

Text

Images

Audio

Video

GPT OSS 20B

Text

Images

Audio

Video

License

Usage and distribution terms

Gemini 3 Flash is licensed under a proprietary license, while GPT OSS 20B uses Apache 2.0.

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

Gemini 3 Flash

Proprietary

Closed source

GPT OSS 20B

Apache 2.0

Open weights

Release Timeline

When each model was launched

Gemini 3 Flash was released on 2025-12-17, while GPT OSS 20B was released on 2025-08-05.

Gemini 3 Flash is 4 months newer than GPT OSS 20B.

Gemini 3 Flash

Dec 17, 2025

4 months ago

4mo newer

GPT OSS 20B

Aug 5, 2025

9 months ago

Knowledge Cutoff

When training data ends

Gemini 3 Flash has a documented knowledge cutoff of 2025-01-31, while GPT OSS 20B's cutoff date is not specified.

We can confirm Gemini 3 Flash's training data extends to 2025-01-31, but cannot make a direct comparison without GPT OSS 20B's cutoff date.

Gemini 3 Flash

Jan 2025

GPT OSS 20B

—

Provider Availability

Gemini 3 Flash is available from Google. GPT OSS 20B is available from Novita, Fireworks, Groq, OpenAI.

Gemini 3 Flash

Google

Input Price:Input: $0.50/1MOutput Price:Output: $3.00/1M

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

* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Gemini 3 Flash

View details

Google

Larger context window (1,000,000 tokens)

Supports multimodal inputs

Higher GPQA score (90.4% vs 71.5%)

Higher Humanity's Last Exam score (43.5% vs 10.9%)

GPT OSS 20B

View details

OpenAI

Less expensive input tokens

Less expensive output tokens

Has open weights

Detailed Comparison

AI Model Comparison Table
Feature	Gemini 3 Flash	GPT OSS 20B

FAQ

Common questions about Gemini 3 Flash vs GPT OSS 20B.

Which is better, Gemini 3 Flash or GPT OSS 20B?

Gemini 3 Flash significantly outperforms across most benchmarks. Gemini 3 Flash 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 Gemini 3 Flash compare to GPT OSS 20B in benchmarks?

Gemini 3 Flash scores Vending-Bench 2: 100.0%, AIME 2025: 99.7%, Global PIQA: 92.8%, MMMLU: 91.8%, GPQA: 90.4%. GPT OSS 20B scores MMLU: 85.3%, CodeForces: 74.3%, GPQA: 71.5%, TAU-bench Retail: 54.8%, HealthBench: 42.5%.

Is Gemini 3 Flash cheaper than GPT OSS 20B?

GPT OSS 20B is 10.0x cheaper for input tokens. Gemini 3 Flash costs $0.50/M input and $3.00/M output via google. GPT OSS 20B costs $0.05/M input and $0.20/M output via novita.

What are the context window sizes for Gemini 3 Flash and GPT OSS 20B?

Gemini 3 Flash supports 1.0M 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 Gemini 3 Flash and GPT OSS 20B?

Key differences include context window (1.0M vs 131K), input pricing ($0.50 vs $0.05/M), multimodal support (yes vs no), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3 Flash and GPT OSS 20B?

Gemini 3 Flash is developed by Google and GPT OSS 20B is developed by OpenAI.