What is the difference between AI21 Jamba Mini 1.5 and Arch Router 1.5B?

AI21 Jamba Mini 1.5 is a 51.6B model from AI21 Labs, while Arch Router 1.5B is a 1.5B model from katanemo. Compare their VRAM requirements above to see which fits your GPU or Mac.

AI21 Jamba Mini 1.5 vs Arch Router 1.5B

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

AI21 Jamba Mini 1.5

AI21 Labs · 51.6B

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Arch Router 1.5B

katanemo · 1.5B

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Specifications

	AI21 Jamba Mini 1.5	Arch Router 1.5B
Parameters	51.6B	1.5B
Context	—	33K
Architecture	—	Qwen2ForCausalLM
License	Other	Other
Downloads	10.0K	1.6K
Released	Feb 2026	Apr 2026

VRAM by Quantization: AI21 Jamba Mini 1.5 vs Arch Router 1.5B

Quantization	Bits	AI21 Jamba Mini 1.5 VRAM	Arch Router 1.5B VRAM
BF16	16.00	113.5 GB	—
FP16	16.00	—	3.5 GB

Verdict

AI21 Jamba Mini 1.5 is the more widely downloaded of the two.

Frequently Asked Questions

What is the difference between AI21 Jamba Mini 1.5 and Arch Router 1.5B?: AI21 Jamba Mini 1.5 is a 51.6B model from AI21 Labs, while Arch Router 1.5B is a 1.5B model from katanemo. Compare their VRAM requirements above to see which fits your GPU or Mac.