Qwen2 1.5B vs Tiny Qwen2ForCausalLM 2.5
Side-by-side comparison of VRAM requirements, quantization, context length, and hardware compatibility.
Specifications
| Qwen2 1.5B | Tiny Qwen2ForCausalLM 2.5 | |
|---|---|---|
| Parameters | 1.5B | 2M |
| Context | 131K | 33K |
| Architecture | Qwen2ForCausalLM | Qwen2ForCausalLM |
| License | Apache 2.0 | — |
| Downloads | 108.4K | 5.5M |
| Released | Jun 2024 | Dec 2025 |
VRAM by Quantization: Qwen2 1.5B vs Tiny Qwen2ForCausalLM 2.5
| Quantization | Bits | Qwen2 1.5B VRAM | Tiny Qwen2ForCausalLM 2.5 VRAM |
|---|---|---|---|
| Q2_K | 3.40 | — | 0.3 GB |
| Q3_K_M | 3.90 | — | 0.3 GB |
| Q3_K_S | 3.50 | — | 0.3 GB |
| Q4_0 | 4.00 | — | 0.3 GB |
| Q4_K_M | 4.80 | — | 0.3 GB |
| Q5_K_M | 5.70 | — | 0.3 GB |
| Q6_K | 6.60 | — | 0.3 GB |
| Q8_0 | 8.00 | — | 0.3 GB |
Verdict
Qwen2 1.5B supports a longer context window (131K tokens). Tiny Qwen2ForCausalLM 2.5 is the more widely downloaded of the two.
Frequently Asked Questions
- Which has a longer context window, Qwen2 1.5B or Tiny Qwen2ForCausalLM 2.5?
Qwen2 1.5B supports 131,072 tokens and Tiny Qwen2ForCausalLM 2.5 supports 32,768 tokens.
- What is the difference between Qwen2 1.5B and Tiny Qwen2ForCausalLM 2.5?
Qwen2 1.5B is a 1.5B model from Alibaba (Qwen 2 family), while Tiny Qwen2ForCausalLM 2.5 is a 2M model from trl-internal-testing (Qwen 2 family). Compare their VRAM requirements above to see which fits your GPU or Mac.