Phi-4 Reasoning vs GPT-4o

This comparison does not currently contain a protocol-matched coding benchmark for both Phi-4 Reasoning and GPT-4o, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.

Only GPT-4o has a directly sourced input price: $1.25 per million tokens. Only GPT-4o has a directly sourced output price: $5.00 per million tokens.

GPT-4o has the larger sourced context window. Phi-4 Reasoning supports 33K and GPT-4o supports 128K.

There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.

Phi-4 Reasoning is the only model in this pair currently marked as self-hostable. Phi-4 Reasoning is open weight; GPT-4o is not marked open weight.

Phi-4 Reasoning is not documented with image input; GPT-4o is documented with image input. This reflects supported input modalities, not vision quality.

Neither has a larger sourced maximum output. Phi-4 Reasoning is — and GPT-4o is 16K.

Phi-4 Reasoning: reasoning. GPT-4o: tool calling and image input. Feature support does not establish relative quality.

Phi-4 Reasoning has 0 sourced provider routes; GPT-4o has 2, so GPT-4o has broader tracked availability.

There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.