Is gpt-oss-120b or OpenAI: GPT-5.2-Codex cheaper?

gpt-oss-120b and OpenAI: GPT-5.2-Codex have comparable output pricing.

Which has the larger context window, gpt-oss-120b or OpenAI: GPT-5.2-Codex?

OpenAI: GPT-5.2-Codex has the larger context window (400K tokens).

gpt-oss-120b vs OpenAI: GPT-5.2-Codex

Both have similar output pricing, while OpenAI: GPT-5.2-Codex offers a larger context window. Choose gpt-oss-120b or OpenAI: GPT-5.2-Codex based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	gpt-oss-120b	OpenAI: GPT-5.2-Codex
Provider	OpenAI	OpenAI
Input / 1M tokens	—	$1.75
Output / 1M tokens	—	$14.00
Context window	—	400K
Parameters	117B	—
Open weights	Yes	No
Released	Aug 2025	Dec 2025

gpt-oss-120b details →OpenAI: GPT-5.2-Codex details →

FAQ

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