Google's fourth-generation open dense model with native multimodal understanding.
OpenAI's compact open-weights model for efficient inference.
No shared demos for these models yet.
No captured outputs for these models yet.
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.
GPT OSS 20B has a lower blended cost. Gemma 4 31B: $0.20 input / $0.40 output. GPT OSS 20B: $0.02 input / $0.09 output.
Gemma 4 31B has a larger context window: Gemma 4 31B supports 262K tokens vs GPT OSS 20B at 131K tokens.
Gemma 4 31B supports vision/image input, but GPT OSS 20B does not.
Key differences: GPT OSS 20B is significantly cheaper; only Gemma 4 31B supports vision input. Compare full specs on this page.
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.