Phi 4 vs Fugu Ultra: side-by-side summary

Phi 4 and Fugu Ultra are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Phi 4, from Microsoft, has a 16,384-token context window and is priced at $0.07/M tokens input, $0.14/M tokens output on OpenRouter.

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.

Context window

• Phi 4: 16,384 tokens
• Fugu Ultra: 1,000,000 tokens

Price

• Phi 4: $0.07/M tokens input, $0.14/M tokens output
• Fugu Ultra: $5/M tokens input, $30/M tokens output

Provided by

• Phi 4: Microsoft
• Fugu Ultra: sakana

• Phi 4 model details, providers and pricing
• Fugu Ultra model details, providers and pricing