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Run it on your own hardware · updated 2026-10-16

Qwen2.5-1.5B-Instruct
How much memory it needs, what its licence allows, and whether it fits an office box.

Short answer. Qwen2.5-1.5B-Instruct needs about 2.6 GB of memory at 4-bit, 3.4 GB at 8-bit and 4.8 GB at full 16-bit precision, including runtime overhead and an 8,192-token KV cache. It has about 1.5 billion parameters and a 32,768-token context window. Licence in short: commercial use allowed. By memory alone, on ANVE’s launch configurations: ANVE One fits at BF16, ANVE Office fits at BF16, ANVE Office Pro (GPU) fits at BF16. These are estimates from its published size, not benchmarks.

01

What it is

Qwen2.5-1.5B-Instruct is a language model for chat, drafting and question answering, published by Alibaba’s Qwen team on Hugging Face on 17 September 2024. It has about 1.5 billion parameters and a configured context window of 32,768 tokens.

Its card lists the licence as Apache 2.0. In short, the licence allows commercial use, modification and redistribution, with attribution and a copy of the licence, and includes a patent grant.

Hugging Face counted about 6,858,498 downloads of it in the 30 days before we checked (7 Oct 2026), and 866 people have liked it there.

It is built on Qwen/Qwen2.5-1.5B, according to its card.

02

How much memory it needs

How these figures are worked out: weights = parameters × bits per weight ÷ 8. The KV cache is added for 8,192 tokens of context, plus about 1.5 GB of runtime overhead. Treat the totals as planning estimates.

Each token of context adds about 0.03 MB of KV cache at 16-bit, so 32,768 tokens would add about 0.94 GB.

PrecisionWeightsKV cache (8,192 tokens)Total, estimated
BF16 (full precision)3.1 GB0.23 GB4.8 GB
8-bit (Q8_0)1.6 GB0.23 GB3.4 GB
4-bit (Q4_K)0.87 GB0.23 GB2.6 GB
03

Architecture at a glance

SettingValue in config.json
Architecture classQwen2ForCausalLM
Model typeqwen2
Layers28
Hidden size1,536
Attention heads12
Key-value heads2 (grouped-query attention)
Head size128
Vocabulary151,936
Configured context32,768
Stored precisionbfloat16
04

Will it fit on ANVE?

How the verdicts are worked out: on ANVE One, about three quarters of 64 GB of unified memory is available to the model; on ANVE Office and ANVE Office Pro, the model has to fit in the 24 GB on the graphics card, with 64 GB or 128 GB of system memory for everything else. This is arithmetic against the launch specification, not a test. ANVE’s tested default is Qwen 3.8 27B; this model is not yet validated on ANVE.

Configuration (at launch)Memory for the modelVerdict
ANVE Oneabout 48 GB of 64 GB unified memoryfits at BF16
ANVE Office24 GB on the RTX PRO 4000 Blackwell SFF Editionfits at BF16
ANVE Office Pro (GPU)24 GB on the RTX PRO 4000 Blackwellfits at BF16
05

What an office would use it for

Models this small are best for routing, classification, autocomplete and simple extraction. They are not reliable for minutes or legal drafting: ANVE never uses anything smaller than a 4B-class model for minutes.

06

Variants with the same size

  • Qwen2-1.5B-Instruct: the instruction-tuned version for chat (same parameter count, so the memory figures above apply).
  • Qwen2.5-Coder-1.5B-Instruct: tuned for writing and reviewing code (same parameter count, so the memory figures above apply).
07

Similar models to compare

  • OLMo-2-0425-1B-Instruct (1.5B parameters, about 2.3 GB at 4-bit before context; commercial use allowed)
  • EuroLLM-1.7B-Instruct (1.7B parameters, about 2.4 GB at 4-bit before context; commercial use allowed)
  • SmolLM2-1.7B-Instruct (1.7B parameters, about 2.5 GB at 4-bit before context; commercial use allowed)
08

Questions people ask

How much memory does Qwen2.5-1.5B-Instruct need?
About 2.6 GB at 4-bit, 3.4 GB at 8-bit and 4.8 GB at full 16-bit precision, including an 8,192-token KV cache and about 1.5 GB of runtime overhead. These are estimates from its parameter count.
Can Qwen2.5-1.5B-Instruct run on a 24 GB graphics card?
Yes, at BF16 by this estimate, with room left for context.
Is Qwen2.5-1.5B-Instruct free for commercial use?
Its card lists Apache 2.0, which allows commercial use, modification and redistribution, with attribution and a copy of the licence, and includes a patent grant. Read the licence itself before relying on this summary; it is not legal advice.
What is Qwen2.5-1.5B-Instruct’s context window?
Its configuration sets 32,768 tokens. Longer contexts need more memory for the KV cache, so the practical limit on a given machine can be lower.
09

What is not real yet

No sealed ANVE unit exists; every image of the appliance on this site is a labelled render. The software runs today on a development machine. No customers yet, no certifications, no delivery date, and the final price is not announced.

Reservations are ₹999 in India or US$12 elsewhere, refundable in full until you confirm an order in writing (terms). Offices that cannot use cloud AI can apply to be one of ten design partners.