Gemma 4 31B vs Grok 4.20: side-by-side summary

Gemma 4 31B and Grok 4.20 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Gemma 4 31B, from Google, has a 262,144-token context window and is priced at $0.09/M tokens input, $0.34/M tokens output on OpenRouter.

Grok 4.20, from SpaceXAI, has a 2,000,000-token context window and is priced at $1.25/M tokens input, $2.50/M tokens output on OpenRouter.

Context window

• Gemma 4 31B: 262,144 tokens
• Grok 4.20: 2,000,000 tokens

Price

• Gemma 4 31B: $0.09/M tokens input, $0.34/M tokens output
• Grok 4.20: $1.25/M tokens input, $2.50/M tokens output

Provided by

• Gemma 4 31B: Google
• Grok 4.20: SpaceXAI

• Gemma 4 31B model details, providers and pricing
• Grok 4.20 model details, providers and pricing