Is GPT-5.3 Codex or OpenAI GPT OSS 120B cheaper?

OpenAI GPT OSS 120B is cheaper on output tokens ($0.30 vs $17.50 per 1M).

Which has the larger context window, GPT-5.3 Codex or OpenAI GPT OSS 120B?

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

GPT-5.3 Codex vs OpenAI GPT OSS 120B

OpenAI GPT OSS 120B is cheaper on output tokens, while GPT-5.3 Codex offers a larger context window. Choose GPT-5.3 Codex or OpenAI GPT OSS 120B based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-5.3 Codex	OpenAI GPT OSS 120B
Provider	Venice AI	Venice AI
Input / 1M tokens	$2.19	$0.07
Output / 1M tokens	$17.50	$0.30
Context window	400K	128K
Parameters	—	117B
Open weights	No	Yes
Released	Feb 2026	Nov 2025

GPT-5.3 Codex details →OpenAI GPT OSS 120B details →

FAQ

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