Is GLM 5.3 FlashX or o3-deep-research cheaper?

GLM 5.3 FlashX is cheaper on output tokens ($1.25 vs $40.00 per 1M).

Which has the larger context window, GLM 5.3 FlashX or o3-deep-research?

GLM 5.3 FlashX has the larger context window (1M tokens).

GLM 5.3 FlashX vs o3-deep-research

GLM 5.3 FlashX is cheaper on output tokens, while GLM 5.3 FlashX offers a larger context window. Choose GLM 5.3 FlashX or o3-deep-research based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GLM 5.3 FlashX	o3-deep-research
Provider	Vercel AI Gateway	Vercel AI Gateway
Input / 1M tokens	$0.37	$10.00
Output / 1M tokens	$1.25	$40.00
Context window	1M	200K
Parameters	—	—
Open weights	Yes	No
Released	Aug 2026	Jun 2025

GLM 5.3 FlashX details →o3-deep-research details →

FAQ

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