Is Qwen3.5 Plus or GPT-5.1 cheaper?

Qwen3.5 Plus is cheaper on output tokens ($1.20 vs $8.50 per 1M).

Which has the larger context window, Qwen3.5 Plus or GPT-5.1?

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

Qwen3.5 Plus vs GPT-5.1

Qwen3.5 Plus is cheaper on output tokens, while GPT-5.1 offers a larger context window. Choose Qwen3.5 Plus or GPT-5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Qwen3.5 Plus	GPT-5.1
Provider	OpenCode Zen	OpenCode Zen
Input / 1M tokens	$0.20	$1.07
Output / 1M tokens	$1.20	$8.50
Context window	262K	400K
Parameters	—	—
Open weights	No	No
Released	Feb 2026	Nov 2025

Qwen3.5 Plus 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.