Is Phi-4-reasoning-plus or GPT-5.3 Codex cheaper?

Phi-4-reasoning-plus is cheaper on output tokens ($0.50 vs $14.00 per 1M).

Which has the larger context window, Phi-4-reasoning-plus or GPT-5.3 Codex?

GPT-5.3 Codex has the larger context window (400K tokens).

Phi-4-reasoning-plus vs GPT-5.3 Codex

Phi-4-reasoning-plus is cheaper on output tokens, while GPT-5.3 Codex offers a larger context window. Choose Phi-4-reasoning-plus or GPT-5.3 Codex based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Phi-4-reasoning-plus	GPT-5.3 Codex
Provider	Azure Cognitive Services	Azure Cognitive Services
Input / 1M tokens	$0.13	$1.75
Output / 1M tokens	$0.50	$14.00
Context window	32K	400K
Parameters	—	—
Open weights	Yes	No
Released	Dec 2024	Feb 2026

Phi-4-reasoning-plus details →GPT-5.3 Codex details →

FAQ

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.