Is Jamba 1.5-Large or GPT-5.1 cheaper?

Jamba 1.5-Large and GPT-5.1 have comparable output pricing.

Which has the larger context window, Jamba 1.5-Large or GPT-5.1?

GPT-5.1 has the larger context window (400K tokens).

Jamba 1.5-Large vs GPT-5.1

Both have similar output pricing, while GPT-5.1 offers a larger context window. Choose Jamba 1.5-Large or GPT-5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Jamba 1.5-Large	GPT-5.1
Provider	AI21 Labs	Poe
Input / 1M tokens	—	$1.10
Output / 1M tokens	—	$9.00
Context window	—	400K
Parameters	398B	—
Open weights	Yes	No
Released	Aug 2024	Nov 2025

Jamba 1.5-Large details →GPT-5.1 details →

FAQ

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