Fugu Ultra vs GLM 5.1: side-by-side summary

Fugu Ultra and GLM 5.1 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Fugu Ultra, from sakana, has a 1,000,000-token context window and is priced at $5/M tokens input, $30/M tokens output on OpenRouter.

GLM 5.1, from Z.ai, has a 204,800-token context window and is priced at $0.91/M tokens input, $2.86/M tokens output on OpenRouter.

Context window

• Fugu Ultra: 1,000,000 tokens
• GLM 5.1: 204,800 tokens

Price

• Fugu Ultra: $5/M tokens input, $30/M tokens output
• GLM 5.1: $0.91/M tokens input, $2.86/M tokens output

Provided by

• Fugu Ultra: sakana
• GLM 5.1: Z.ai

• Fugu Ultra model details, providers and pricing
• GLM 5.1 model details, providers and pricing