Is StepFun 3.5 Flash or GPT-5.2-Codex cheaper?

StepFun 3.5 Flash is cheaper on output tokens ($0.30 vs $14.00 per 1M).

Which has the larger context window, StepFun 3.5 Flash or GPT-5.2-Codex?

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

StepFun 3.5 Flash vs GPT-5.2-Codex

StepFun 3.5 Flash is cheaper on output tokens, while GPT-5.2-Codex offers a larger context window. Choose StepFun 3.5 Flash or GPT-5.2-Codex based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	StepFun 3.5 Flash	GPT-5.2-Codex
Provider	Vercel AI Gateway	Vercel AI Gateway
Input / 1M tokens	$0.09	$1.75
Output / 1M tokens	$0.30	$14.00
Context window	262K	400K
Parameters	—	—
Open weights	No	No
Released	Jan 2026	Dec 2025

StepFun 3.5 Flash details →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.