Which has a longer context window, Arch Router 1.5B or Qwen2 1.5B?

Arch Router 1.5B supports 32,768 tokens and Qwen2 1.5B supports 131,072 tokens.

What is the difference between Arch Router 1.5B and Qwen2 1.5B?

Arch Router 1.5B is a 1.5B model from katanemo, while Qwen2 1.5B is a 1.5B model from Alibaba (Qwen 2 family). Compare their VRAM requirements above to see which fits your GPU or Mac.

Arch Router 1.5B vs Qwen2 1.5B

Side-by-side comparison of VRAM requirements, quantization, context length, and hardware compatibility.

Arch Router 1.5B

katanemo · 1.5B

Chat

Qwen2 1.5B

Alibaba · 1.5B

Chat

Specifications

	Arch Router 1.5B	Qwen2 1.5B
Parameters	1.5B	1.5B
Context	33K	131K
Architecture	Qwen2ForCausalLM	Qwen2ForCausalLM
License	Other	Apache 2.0
Downloads	1.6K	108.4K
Released	Apr 2026	Jun 2024

VRAM by Quantization: Arch Router 1.5B vs Qwen2 1.5B

Quantization	Bits	Arch Router 1.5B VRAM	Qwen2 1.5B VRAM
BF16	16.00	—	3.5 GB
FP16	16.00	3.5 GB	—

Verdict

Qwen2 1.5B supports a longer context window (131K tokens). Qwen2 1.5B is the more widely downloaded of the two.

Frequently Asked Questions

Which has a longer context window, Arch Router 1.5B or Qwen2 1.5B?: Arch Router 1.5B supports 32,768 tokens and Qwen2 1.5B supports 131,072 tokens.
What is the difference between Arch Router 1.5B and Qwen2 1.5B?: Arch Router 1.5B is a 1.5B model from katanemo, while Qwen2 1.5B is a 1.5B model from Alibaba (Qwen 2 family). Compare their VRAM requirements above to see which fits your GPU or Mac.