Phi 4 vs GPT-6 Astra Pro: side-by-side summary

Phi 4 and GPT-6 Astra Pro 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.

GPT-6 Astra Pro, from OpenAI, has a 1,050,000-token context window and is priced at $10/M tokens input, $50/M tokens output on OpenRouter.

Context window

• Phi 4: 16,384 tokens
• GPT-6 Astra Pro: 1,050,000 tokens

Price

• Phi 4: $0.07/M tokens input, $0.14/M tokens output
• GPT-6 Astra Pro: $10/M tokens input, $50/M tokens output

Provided by

• Phi 4: Microsoft
• GPT-6 Astra Pro: OpenAI

• Phi 4 model details, providers and pricing
• GPT-6 Astra Pro model details, providers and pricing