Is GPT-5.3-Codex-Spark or GPT-3.5-Turbo cheaper?

GPT-5.3-Codex-Spark is cheaper on output tokens ($0.00 vs $1.40 per 1M).

Which has the larger context window, GPT-5.3-Codex-Spark or GPT-3.5-Turbo?

GPT-5.3-Codex-Spark has the larger context window (128K tokens).

GPT-5.3-Codex-Spark vs GPT-3.5-Turbo

GPT-5.3-Codex-Spark is cheaper on output tokens, while GPT-5.3-Codex-Spark offers a larger context window. Choose GPT-5.3-Codex-Spark or GPT-3.5-Turbo based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-5.3-Codex-Spark	GPT-3.5-Turbo
Provider	Poe	Poe
Input / 1M tokens	$0.00	$0.45
Output / 1M tokens	$0.00	$1.40
Context window	128K	16K
Parameters	—	20B
Open weights	No	No
Released	Mar 2026	Sep 2023

GPT-5.3-Codex-Spark details →GPT-3.5-Turbo details →

FAQ

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