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Gemma 4 31B vs GPT OSS 20B

At a glance
GoogleGemma 4 31B

Google's fourth-generation open dense model with native multimodal understanding.

262K ctx$0.12/$0.35 per M
OpenAIGPT OSS 20B

OpenAI's compact open-weights model for efficient inference.

131K ctx$0.03/$0.14 per M
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
GoogleGemma 4 31B
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-07-10
Reasoning & Knowledge
Factual Recall9.6%
Agentic
Terminal Tasks—
OpenAIGPT OSS 20B
Reasoning
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Reasoning & Knowledge
Factual Recall—
Agentic
Terminal Tasks3.4%
Specs
GoogleGemma 4 31B
262K
Context
128K
Max output
Apr 2026
Released
OpenAIGPT OSS 20B
131K
Context
16K
Max output
Aug 2025
Released
Capabilities
GoogleGemma 4 31B
Vision
Audio
Reasoning
OpenAIGPT OSS 20B
Vision
Audio
Reasoning
Pricing
GoogleGemma 4 31B
Live pricing, shown before you run
Input$0.12/M tokens
Output$0.35/M tokens
Cache read$0.09/M tokens
OpenAIGPT OSS 20B
Live pricing, shown before you run
Input$0.03/M tokens
Output$0.14/M tokens
Chat with Gemma 4 31BGo to model
Chat with GPT OSS 20BGo to model
Frequently Asked Questions: Gemma 4 31B vs GPT OSS 20B▼

Which is better, Gemma 4 31B or GPT OSS 20B?

▼

Both Gemma 4 31B and GPT OSS 20B are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Gemma 4 31B or GPT OSS 20B?

▼

GPT OSS 20B has a lower blended cost. Gemma 4 31B: $0.12 input / $0.35 output. GPT OSS 20B: $0.03 input / $0.14 output.

Which has a larger context window, Gemma 4 31B or GPT OSS 20B?

▼

Gemma 4 31B has a larger context window: Gemma 4 31B supports 262K tokens vs GPT OSS 20B at 131K tokens.

Do both Gemma 4 31B and GPT OSS 20B support vision?

▼

Gemma 4 31B supports vision/image input, but GPT OSS 20B does not.

What are the key differences between Gemma 4 31B and GPT OSS 20B?

▼

Key differences: GPT OSS 20B is significantly cheaper; only Gemma 4 31B supports vision input. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Gemma 4 31B and GPT OSS 20B for free on idapt.app to see which performs better for your specific needs.

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