CogVLM2 19B needs ~20.1 GB VRAM. MacBook Pro M3 Max 48GB has 34.6 GB. With Q4_K_M quantization, expect ~22 tok/s.
Operating mode
Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.
Current mode
Balanced
Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.
Select quantization to explore
Fit status
Runs well
Decode
22.3 tok/s
TTFT
8697 ms
Safe context
8K
Memory
20.1 GB / 34.6 GB
This setup is broadly balanced for this model.
Shared-memory contention still exists
The OS, browser, and inference runtime all compete for the same physical memory pool, so real-world headroom is less forgiving than raw capacity suggests.
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | A | Runs well | 22.3 tok/s | 4744 ms | 8K |
| Coding | A | Runs well | 22.3 tok/s | 8697 ms | 8K |
| Agentic Coding | A | Runs well | 22.3 tok/s | 12650 ms | 8K |
| Reasoning | A | Runs well | 22.3 tok/s | 10278 ms | 8K |
| RAG | A | Runs well | 22.3 tok/s | 15813 ms | 8K |
How CogVLM2 19B (19B params) fits at each quantization level on MacBook Pro M3 Max 48GB (34.6 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 7.4 GB | Low | A77 |
Q3_K_S | 3 | 9.3 GB | Low | A78 |
NVFP4 | 4 |
Copy-paste commands to run CogVLM2 19B on your machine.
Run
docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
--hf-repo "THUDM/cogvlm2-llama3-chat-19B" \
--hf-file "cogvlm2-llama3-chat-19B-Q4_K_M.gguf" \
-c 4096 -ngl 99Your hardware
| Model | Params | Grade | Decode | Capabilities |
|---|---|---|---|---|
 Qwen3-Coder 30B A3B Instruct | 30.5B | S | 36.3 tok/s | |
| Qwen 3.5 27B | 27B | S | 15.7 tok/s |
Yes, MacBook Pro M3 Max 48GB can run CogVLM2 19B with a A grade (Runs well). Expected decode speed: 22.3 tok/s.
CogVLM2 19B (19B parameters) requires approximately 20.1 GB of memory with Q4_K_M quantization.
The recommended quantization for CogVLM2 19B is Q4_K_M, which balances quality and memory efficiency.
On MacBook Pro M3 Max 48GB, CogVLM2 19B achieves approximately 22.3 tokens per second decode speed with a time-to-first-token of 8697ms using Q4_K_M quantization.
For coding workloads, CogVLM2 19B on MacBook Pro M3 Max 48GB receives a A grade with 22.3 tok/s and 8K context.
On MacBook Pro M3 Max 48GB, CogVLM2 19B can safely use up to 8K tokens of context. The model's official context limit is 8K, but available memory constrains the safe maximum.
Paste this snippet into any page to show a live fit card.
<iframe src="https://willitrunai.com/embed/cogvlm2-19b-on-m3-max-48gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
Preview:
10.6 GB |
| Medium |
| A79 |
Q4_K_M | 4 | 11.6 GB | Medium | A79 |
Q5_K_M | 5 | 13.7 GB | High | A80 |
Q6_K | 6 | 15.6 GB | High | A81 |
Q8_0Best for your GPU | 8 | 20.3 GB | Very High | A82 |
F16 | 16 | 38.9 GB | Maximum | F0 |
| Qwen 3.6 27B | 27B | S | 12 tok/s |
| Qwen 3.6 35B A3B | 35B | S | 33.5 tok/s |
| Qwen3-VL 30B A3B Instruct | 30B | S | 37.5 tok/s |
Not always. MacBook Pro M3 Max 48GB can often fit larger models thanks to unified memory, but a discrete GPU with dedicated high-bandwidth VRAM may still decode faster once the model fits. For this combination, the important distinction is capacity versus sustained throughput.