Is Nemotron 3 Ultra 550B A55B or GPT-5.3 Codex cheaper?

Nemotron 3 Ultra 550B A55B is cheaper on output tokens ($2.20 vs $14.00 per 1M).

Which has the larger context window, Nemotron 3 Ultra 550B A55B or GPT-5.3 Codex?

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

Nemotron 3 Ultra 550B A55B vs GPT-5.3 Codex

Nemotron 3 Ultra 550B A55B is cheaper on output tokens, while GPT-5.3 Codex offers a larger context window. Choose Nemotron 3 Ultra 550B A55B or GPT-5.3 Codex based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Nemotron 3 Ultra 550B A55B	GPT-5.3 Codex
Provider	OpenRouter	OpenRouter
Input / 1M tokens	$0.50	$1.75
Output / 1M tokens	$2.20	$14.00
Context window	262K	400K
Parameters	—	—
Open weights	Yes	No
Released	Jun 2026	Feb 2026

Nemotron 3 Ultra 550B A55B 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.