Phi 4 vs Solar Pro 4: side-by-side summary

Phi 4 and Solar Pro 4 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.

Solar Pro 4, from upstage, has a 524,288-token context window and is priced at $0.03/M tokens input, $0.12/M tokens output on OpenRouter.

Context window

• Phi 4: 16,384 tokens
• Solar Pro 4: 524,288 tokens

Price

• Phi 4: $0.07/M tokens input, $0.14/M tokens output
• Solar Pro 4: $0.03/M tokens input, $0.12/M tokens output

Provided by

• Phi 4: Microsoft
• Solar Pro 4: upstage

• Phi 4 model details, providers and pricing
• Solar Pro 4 model details, providers and pricing