Qwythos 9B Claude Mythos 5 1M — Hardware Requirements & GPU Compatibility
ChatReasoningFunctions
Qwythos 9B Claude Mythos 5 1M is a 9.4B-parameter open language model from empero-ai. It supports a context window of up to 1,048,576 tokens. At Q4_K_M it needs about 6.21 GB of VRAM — see which GPUs and Macs can run it below.
Runs great on a 24 GB GPU
Runs from 8 GB (Q4_K_M · 32K)Best on 24 GB (Q4_K_M · ~106 tok/s · 512K)Macs from 16 GB (Q4_K_M · ~23 tok/s)
Apache 2.0
Reference GPU · RTX 4090 24 GB
Estimates, ±20% · how we estimate
Run Qwythos 9B Claude Mythos 5 1M
One recommended way. Every other method, OS and quant is in the step-by-step guide.
Recommended
vllm serve empero-ai/Qwythos-9B-Claude-Mythos-5-1M --max-model-len 16384vLLM repo with its own quantisation
Download: Weights on Hugging Face
Other ways
each opens step-by-stepRun in cloud
Fits on RTX 3060 12GB (5 GB headroom) · Q4_K_M
- Generation speed
- ~38 tok/s
- generation speed
- Cost per 1M output tokens
- $0.51
- per 1M output tokens
How Much VRAM Does Qwythos 9B Claude Mythos 5 1M Need?
Select a quantization level; the listed hardware adheres to it.
| Quantization | VRAM | +32K | On RTX 4090 (reference) | |
|---|---|---|---|---|
| 4.6 GB | 5.4 GB | 2-bit · K-quant — 2-bit quantization with K-quant improvements | Fits: 512K context · ~143 tok/s | |
| 5.2 GB | 6 GB | 3-bit medium — 3-bit medium quantization | Fits: 512K context · ~127 tok/s | |
| 6.2 GB | 7 GB | 4-bit medium — 4-bit medium quantization — most popular sweet spot | Fits: 512K context · ~106 tok/s | |
| 7.3 GB | 8.1 GB | 5-bit medium — 5-bit medium quantization — good quality/size tradeoff | Fits: 256K context · ~90 tok/s | |
| 8.3 GB | 9.1 GB | 6-bit, very good — 6-bit quantization, very good quality | Fits: 256K context · ~79 tok/s | |
| 10.0 GB | 10.8 GB | 8-bit, near-lossless — 8-bit quantization, near-lossless | Fits: 256K context · ~66 tok/s | |
| 19.4 GB | 20.2 GB | 16-bit · bfloat — Brain floating point 16 — preferred for training | Fits: 128K context · ~34 tok/s |
Selected Q4_K_M
4-bit medium quantization6.5GBat 16K context
- Weights
- 5.6 GB
- KV cache
- 0.5 GB
- Overhead
- 0.3 GB
Fits RTX 4090 (reference) · 17.5 GB free · ~106 tok/s
≥50 tok/s needs ≥477 GB/s · RTX 5090 ~188, RTX 3090 Ti ~106
Which Hardware Can Run Qwythos 9B Claude Mythos 5 1M?
Q4_K_M · 6.2 GBQwythos 9B Claude Mythos 5 1M (Q4_K_M) requires 6.2 GB of VRAM to load the model weights. For comfortable inference with headroom for KV cache and system overhead, 9+ GB is recommended. Using the full 1049K context window can add up to 34.1 GB, bringing total usage to 40.3 GB. 52 GPUs can run it, including NVIDIA GeForce RTX 5090, NVIDIA GeForce RTX 3090 Ti, NVIDIA GeForce RTX 3070 Ti. 151 devices with unified memory can run Qwythos 9B Claude Mythos 5 1M, including Mac Studio (M3 Ultra, 256GB), Mac Studio (M3 Ultra, 512GB), NVIDIA Jetson Orin Nano 8GB (Super).
≤ 11 GB
≤ 11 GB tier →fits · 1.5 GB free · up to 32K ctx
16 GPUs · 1 device family
RTX 3080~80Simulate output on RTX 3080RTX 2080 Ti~65Simulate output on RTX 2080 TiRTX 3070 Ti~64Simulate output on RTX 3070 TiOrin Nano~11Simulate output on NVIDIA Jetson Orin Nano 8GB (Super)20 GB
fits · 13.5 GB free · up to 256K ctx
1 GPU
RX 7900 XT~77Simulate output on RX 7900 XT32–40 GB
fits · 25.5 GB free · up to 512K ctx
1 GPU · 3 Mac classes · 4 device families
RTX 5090~188Simulate output on RTX 5090M5 Max36 GB~52Simulate output on Mac Studio M5 Max (36 GB)M532 GB~17Simulate output on MacBook Air 13" M5 (32 GB)Orin~21Simulate output on NVIDIA Jetson AGX Orin 32GBSnapdragon X Elite (X1E-80-100)~14Simulate output on Snapdragon X Elite Copilot+ PC
By VRAM tier · typical GPUs and Macs at Q4_K_M
Similar models
6| Model | Score | VRAM | tok/s | Why it is similar |
|---|---|---|---|---|
| Qwen3.5 9BAlibaba | 99.4 | 6.6 GB | ~103 | same size |
| Granite Switch 4.1 8BIBM | — | 20.7 GB | ~36 | same size |
| Ornith 1.5 9Bornith-ai | — | 6.6 GB | ~103 | same size |
| Apertus V1.5 8Bswiss-ai | — | 8.5 GB | ~111 | same size |
| MiniCPM O 4 5OpenBMB | — | 8.3 GB | ~105 | same size |
| Qwen3 VL 8B InstructAlibaba | — | 8 GB | ~112 | same size |
Fine-tunes & variants(2)
Specifications
- Publisher
- empero-ai
- Parameters
- 9.4B
- Architecture
- Qwen3_5ForConditionalGeneration
- Context Length
- 1,048,576 tokens
- Vocabulary Size
- 248,320
- Release Date
- 2026-06-19
- License
- Apache 2.0
Frequently Asked Questions
How much VRAM does Qwythos 9B Claude Mythos 5 1M need?
Qwythos 9B Claude Mythos 5 1M requires 6.2 GB of VRAM at Q4_K_M, or 19.4 GB at BF16. Full 1049K context adds up to 34.1 GB (40.3 GB total).
VRAM = Weights + KV Cache + Overhead
Weights = 9.4B × 4.8 bits ÷ 8 = 5.6 GB
KV Cache + Overhead ≈ 0.6 GB (at 2K context + ~0.3 GB framework)
Fit ratings and hardware model lists check this model with room for a 16K-token context, which needs a little more memory.
KV Cache + Overhead ≈ 34.7 GB (at full 1049K context)
VRAM usage by quantization
What's the best quantization for Qwythos 9B Claude Mythos 5 1M?
For Qwythos 9B Claude Mythos 5 1M, Q4_K_M (6.2 GB) offers the best balance of quality and VRAM usage. Q5_K_M (7.3 GB) provides better quality if you have the VRAM. The smallest option is Q2_K at 4.6 GB.
VRAM requirement by quantization
★ Recommended — best balance of quality and VRAM usage.
Can I run Qwythos 9B Claude Mythos 5 1M on a Mac?
Yes — Mac Mini M2 Pro (16 GB) and 133 other Macs can run Qwythos 9B Claude Mythos 5 1M. Apple Silicon uses unified memory, so the model shares RAM with the system. At Q4_K_M you need at least 6.2 GB of usable unified memory (RAM minus macOS overhead).
Can I run Qwythos 9B Claude Mythos 5 1M locally?
Yes — Qwythos 9B Claude Mythos 5 1M can run locally on consumer hardware. Popular tools include Ollama, LM Studio, and llama.cpp.
How fast is Qwythos 9B Claude Mythos 5 1M?
At Q4_K_M, Qwythos 9B Claude Mythos 5 1M can reach ~773 tok/s on AMD Instinct MI350X. On NVIDIA GeForce RTX 4090: ~106 tok/s. Speed depends mainly on GPU memory bandwidth. Real-world results typically within ±20%.
tok/s = (bandwidth GB/s ÷ model GB) × efficiency
Example: NVIDIA B200 → 8000 ÷ 6.21 × 0.65 = ~837 tok/s
Estimated speed at Q4_K_M (6.2 GB)
Real-world results typically within ±20%. Speed depends on batch size, quantization kernel, and software stack.
What's the download size of Qwythos 9B Claude Mythos 5 1M?
At Q4_K_M, the download is about 5.65 GB. The full-precision BF16 version is 18.82 GB. The smallest option (Q2_K) is 4.00 GB.
Which GPUs can run Qwythos 9B Claude Mythos 5 1M?
52 consumer GPUs can run Qwythos 9B Claude Mythos 5 1M at Q4_K_M. Top options include AMD Radeon RX 6700 XT, AMD Radeon RX 6800, AMD Radeon RX 6800 XT, AMD Radeon RX 7600. 40 GPUs have plenty of headroom for comfortable inference.
Which devices can run Qwythos 9B Claude Mythos 5 1M?
151 devices with unified memory can run Qwythos 9B Claude Mythos 5 1M at Q4_K_M (6.2 GB), including AMD Ryzen AI 9 HX 370 (Strix Point) Laptop, ASUS Ascent GX10, Beelink GTR9 Pro (Ryzen AI Max+ 395, 128 GB), Framework Desktop (Ryzen AI Max+ 395, 128 GB). Apple Silicon Macs use unified memory shared between CPU and GPU, making them well-suited for local LLM inference.