--- title: GLM-5.1 metatags: description: "Deploy GLM-5.1 with SGLang on NVIDIA H100/H200/B300/GB300 and AMD MI300X/MI325X/MI355X." --- ## 1. Model Introduction **Available Models:** - **BF16 (Full precision)**: [zai-org/GLM-5.1](https://huggingface.co/zai-org/GLM-5.1) - **FP8 (8-bit quantized)**: [zai-org/GLM-5.1-FP8](https://huggingface.co/zai-org/GLM-5.1-FP8) - **NVFP4 (4-bit quantized)**: [nvidia/GLM-5.1-NVFP4](https://huggingface.co/nvidia/GLM-5.1-NVFP4) **License:** MIT ## 2. SGLang Installation Please refer to the [official SGLang installation guide](../../../docs/get-started/install) for installation instructions. ## 3. Model Deployment This section provides deployment configurations optimized for different hardware platforms and use cases. ### 3.1 Basic Configuration **Interactive Command Generator**: Use the configuration selector below to automatically generate the appropriate deployment command for your hardware platform, quantization method, and capabilities. SGLang supports serving GLM-5.1 on NVIDIA H100, H200, B300, GB300, and AMD MI300X/MI325X/MI355X GPUs. import { GLM51Deployment } from '/src/snippets/autoregressive/glm-51-deployment.jsx' All recipes here run the DSA indexer top-k on the default `--dsa-topk-backend sgl-kernel`. Other top-k backend choices have not been fully validated on GLM-5.1. ### 3.2 Configuration Tips - Speculative decoding (MTP) can significantly reduce latency for interactive use cases. - **DP Attention**: Enables data parallel attention for higher throughput under high concurrency. Note that DP attention trades off low-concurrency latency for high-concurrency throughput — disable it if your workload is latency-sensitive with few concurrent requests. - The `--mem-fraction-static` flag is recommended for optimal memory utilization, adjust it based on your hardware and workload.
Hardware NVFP4 FP8 BF16 MXFP4
H100 — tp=16 — —
H200 — tp=8 — —
B300 tp=8 — — —
GB300 tp=4 — — —
MI300X/MI325X — tp=8 tp=8 —
MI355X — tp=8 tp=8 tp=4
- **H100 and H200**: FP8 is the recommended deployment path. - **B300 and GB300**: NVFP4 is the recommended deployment path. Use `nvidia/GLM-5.1-NVFP4` with `--quantization modelopt_fp4`. Use `tp=8` on B300 and `tp=4` on GB300. The CUDA 13 image variant is required for B300 and GB300. - **AMD GPUs**: BF16 and FP8 checkpoints run on MI300X/MI325X/MI355X at tp=8. On MI355X (gfx950), the MXFP4 checkpoint `amd/GLM-5.1-MXFP4` is also supported at tp=4 with `--kv-cache-dtype fp8_e4m3`. All AMD paths pass `--dsa-prefill-backend tilelang --dsa-decode-backend tilelang`, `--chunked-prefill-size 131072`, and `--watchdog-timeout 1200` (20 minutes for weight loading). FP8 uses approximately half the memory of BF16 (~89 GB/GPU vs ~175 GB/GPU). EAGLE speculative decoding is supported on AMD GPUs: MI300X/MI325X (gfx942) and MI355X (gfx950), but it **requires `--disable-custom-all-reduce`** — the aiter custom all-reduce kernel deadlocks during EAGLE verify at high concurrency, so without this flag the server will hang. - For other configuration tips (MTP, DSA kernel, Context Parallel, HiSparse, NVFP4, Index Cache), see the [DeepSeek-V3.2 cookbook page](../DeepSeek/DeepSeek-V3_2). GLM-5.1 and DeepSeek-V3.2 share the same model structure, so the optimization techniques are common. - **Prefill CP on CUDA**: Zigzag (`--cp-strategy zigzag`) is temporarily unavailable for GLM-5.1. Use `--enable-prefill-cp --cp-strategy interleave` with `--dp 1`. - Use `--json-model-override-args '{"index_topk_pattern": "FFSFSSSFSSFFFSSSFFFSFSSSSSSFFSFFSFFSSFFFFFFSFFFFFSFFSSSSSSFSFFFSFSSSFSFFSFFSSS"}'` to enable the [IndexCache](https://github.com/THUDM/IndexCache) method for GLM-5.1. This can improve serving efficiency with only a small accuracy loss. If you are running rigorous accuracy evaluations, do not enable this feature. ## 4. Model Invocation Deploy GLM-5.1 with the following command (FP8 on H200, all features enabled): ```shell Command sglang serve \ --model-path zai-org/GLM-5.1-FP8 \ --tp 8 \ --tool-call-parser glm47 \ --reasoning-parser glm45 \ --speculative-algorithm EAGLE \ --speculative-num-steps 3 \ --speculative-eagle-topk 1 \ --speculative-num-draft-tokens 4 \ --mem-fraction-static 0.85 \ --host 0.0.0.0 \ --port 30000 ``` ### 4.1 B300/GB300 (NVFP4) Server Command #### B300 ```shell Command sglang serve \ --model-path nvidia/GLM-5.1-NVFP4 \ --tp 8 \ --quantization modelopt_fp4 \ --tool-call-parser glm47 \ --reasoning-parser glm45 \ --speculative-algorithm EAGLE \ --speculative-num-steps 3 \ --speculative-eagle-topk 1 \ --speculative-num-draft-tokens 4 \ --trust-remote-code \ --mem-fraction-static 0.80 \ --host 0.0.0.0 \ --port 30000 ``` #### GB300 ```shell Command sglang serve \ --model-path nvidia/GLM-5.1-NVFP4 \ --tp 4 \ --quantization modelopt_fp4 \ --tool-call-parser glm47 \ --reasoning-parser glm45 \ --speculative-algorithm EAGLE \ --speculative-num-steps 3 \ --speculative-eagle-topk 1 \ --speculative-num-draft-tokens 4 \ --trust-remote-code \ --mem-fraction-static 0.80 \ --host 0.0.0.0 \ --port 30000 ``` ### 4.2 MI300X/MI325X/MI355X (ROCm) Server Command The following ROCm commands are additional options for AMD GPUs and do not replace the NVIDIA instructions above. #### MXFP4 (MI355X / gfx950) On MI355X (gfx950), set `SGLANG_DSA_TRITON_PREFILL=1` to enable a faster Triton attention kernel for the prefill phase (opt-in, off by default). Keep `--dsa-prefill-backend tilelang` as shown. The EAGLE speculative-decoding flags below are optional but recommended on gfx950. ```shell Command # SGLANG_DSA_TRITON_PREFILL=1 is optional; it enables a faster Triton prefill kernel on gfx950 SGLANG_DSA_TRITON_PREFILL=1 sglang serve \ --model-path amd/GLM-5.1-MXFP4 \ --tp 4 \ --trust-remote-code \ --kv-cache-dtype fp8_e4m3 \ --tool-call-parser glm47 \ --reasoning-parser glm45 \ --dsa-prefill-backend tilelang \ --dsa-decode-backend tilelang \ --chunked-prefill-size 131072 \ --mem-fraction-static 0.85 \ --watchdog-timeout 1200 \ --speculative-algorithm EAGLE \ --speculative-num-steps 3 \ --speculative-eagle-topk 1 \ --speculative-num-draft-tokens 4 \ --disable-custom-all-reduce \ --host 0.0.0.0 \ --port 30000 ``` #### FP8 (Recommended) ```shell Command sglang serve \ --model-path zai-org/GLM-5.1-FP8 \ --tp 8 \ --trust-remote-code \ --tool-call-parser glm47 \ --reasoning-parser glm45 \ --dsa-prefill-backend tilelang \ --dsa-decode-backend tilelang \ --chunked-prefill-size 131072 \ --mem-fraction-static 0.80 \ --watchdog-timeout 1200 \ --speculative-algorithm EAGLE \ --speculative-num-steps 3 \ --speculative-eagle-topk 1 \ --speculative-num-draft-tokens 4 \ --disable-custom-all-reduce \ --host 0.0.0.0 \ --port 30000 ``` #### BF16 ```shell Command sglang serve \ --model-path zai-org/GLM-5.1 \ --tp 8 \ --trust-remote-code \ --dsa-prefill-backend tilelang \ --dsa-decode-backend tilelang \ --chunked-prefill-size 131072 \ --mem-fraction-static 0.80 \ --watchdog-timeout 1200 \ --speculative-algorithm EAGLE \ --speculative-num-steps 3 \ --speculative-eagle-topk 1 \ --speculative-num-draft-tokens 4 \ --disable-custom-all-reduce \ --host 0.0.0.0 \ --port 30000 ``` ### 4.3 Basic Usage For basic API usage and request examples, please refer to: - [SGLang Basic Usage Guide](../../../docs/basic_usage/send_request) ### 4.4 Advanced Usage #### 4.4.1 Reasoning Parser GLM-5.1 supports Thinking mode **by default**. Enable the reasoning parser during deployment to separate the thinking and content sections. The thinking process is returned via `reasoning_content` in the streaming response. To disable thinking and use Instruct mode, pass `chat_template_kwargs` at request time: - **Thinking mode** (default): The model performs step-by-step reasoning before answering. No extra parameters needed. - **Instruct mode** (`{"enable_thinking": false}`): The model responds directly without a thinking process. **Example 1: Thinking Mode (Default)** Thinking mode is enabled by default. The model will reason step-by-step before answering, and the thinking process is returned via `reasoning_content`: ```python Example from openai import OpenAI client = OpenAI( base_url="http://localhost:30000/v1", api_key="EMPTY" ) # Thinking mode is enabled by default, no extra parameters needed response = client.chat.completions.create( model="zai-org/GLM-5.1-FP8", messages=[ {"role": "user", "content": "Solve this problem step by step: What is 15% of 240?"} ], max_tokens=2048, stream=True ) # Process the stream has_thinking = False has_answer = False thinking_started = False for chunk in response: if chunk.choices and len(chunk.choices) > 0: delta = chunk.choices[0].delta # Print thinking process if hasattr(delta, 'reasoning_content') and delta.reasoning_content: if not thinking_started: print("=============== Thinking =================", flush=True) thinking_started = True has_thinking = True print(delta.reasoning_content, end="", flush=True) # Print answer content if delta.content: # Close thinking section and add content header if has_thinking and not has_answer: print("\n=============== Content =================", flush=True) has_answer = True print(delta.content, end="", flush=True) print() ``` **Output Example:** ```text Output =============== Thinking ================= 1. **Understand the Goal:** The user wants to find 15% of 240, and they want the solution explained step-by-step. 2. **Identify the Core Mathematical Concept:** "Percent" means "per hundred" or "out of 100". Finding "X% of Y" translates to the mathematical operation: $(X / 100) \times Y$. 3. **Step-by-Step Breakdown:** * *Step 1: Convert the percentage to a decimal (or fraction).* 15% means 15 out of 100, which is $15/100$ or $0.15$. * *Step 2: Multiply the decimal by the given number.* Multiply $0.15$ by $240$. * *Step 3: Perform the calculation.* * $0.15 \times 240$ * I can break this down further to make it easy to follow: * $0.10 \times 240 = 24$ (which is 10%) * $0.05 \times 240 = 12$ (which is 5%, half of 10%) * $24 + 12 = 36$ * Alternatively, standard multiplication: * $240 \times 15 = 3600$ * Move decimal two places left -> $36$ * *Step 4: State the final answer clearly.* 4. **Draft the Response (incorporating the steps clearly):** * *Introduction:* State the problem clearly. * *Step 1:* Explain how to convert 15% to a decimal. * *Step 2:* Explain the multiplication step. * *Step 3:* Show the actual math (I'll provide the standard multiplication and the "mental math" trick as it adds value). * *Conclusion:* Give the final answer. 5. **Refine the Output (Self-Correction/Polishing during drafting):** * *Drafting Step 1:* To find 15% of 240, first convert 15% into a decimal. Since percent means "per hundred," you divide 15 by 100. 15 ÷ 100 = 0.15. * *Drafting Step 2:* Next, multiply this decimal by the number you are finding the percentage of (which is 240). So, calculate 0.15 × 240. * *Drafting Step 3 (Standard way):* 0.15 × 240 = 36. * *Adding the alternative mental math way:* It's often helpful to break it down into 10% and 5%. * 10% of 240 = 24 (move the decimal point one place to the left) * 5% is half of 10%, so half of 24 = 12 * Add them together: 24 + 12 = 36. * *Final Answer:* 15% of 240 is 36. 6. **Final Review against User Prompt:** Does it solve the problem? Yes. Is it step-by-step? Yes. Is it clear? Yes. (Proceed to generate output). =============== Content ================= Here is the step-by-step solution to find 15% of 240: **Step 1: Convert the percentage to a decimal.** To convert a percentage to a decimal, divide it by 100 (or simply move the decimal point two places to the left). * 15% = 15 ÷ 100 = **0.15** **Step 2: Multiply the decimal by the number.** Now, multiply the decimal (0.15) by the number you are finding the percentage of (240). * 0.15 × 240 = **36** *(Alternative mental math method for Step 2)*: If you don't want to multiply by 0.15 directly, you can break 15% down into 10% and 5%: * **10% of 240** = 24 (just move the decimal point one place to the left) * **5% of 240** = 12 (5% is half of 10%, so just divide 24 by 2) * **Add them together**: 24 + 12 = **36** **Answer:** 15% of 240 is **36**. ``` **Example 2: Instruct Mode (Thinking Off)** To disable thinking and get a direct response, pass `{"enable_thinking": false}` via `chat_template_kwargs`: ```python Example from openai import OpenAI client = OpenAI( base_url="http://localhost:30000/v1", api_key="EMPTY" ) # Disable thinking mode via chat_template_kwargs response = client.chat.completions.create( model="zai-org/GLM-5.1-FP8", messages=[ {"role": "user", "content": "What is 15% of 240?"} ], extra_body={"chat_template_kwargs": {"enable_thinking": False}}, max_tokens=2048, stream=True ) # In Instruct mode, the model responds directly without reasoning_content for chunk in response: if chunk.choices and len(chunk.choices) > 0: delta = chunk.choices[0].delta if delta.content: print(delta.content, end="", flush=True) print() ``` **Output Example:** ```text Output 15% of 240 is 36. Here is how to calculate it: 1. Convert the percentage to a decimal: 15% = 0.15 2. Multiply the decimal by the number: 0.15 × 240 = 36 ``` #### 4.4.2 Tool Calling GLM-5.1 supports tool calling capabilities. Enable the tool call parser during deployment. Thinking mode is on by default; to disable it for tool calling requests, pass `extra_body={"chat_template_kwargs": {"enable_thinking": False}}`. **Python Example (with Thinking Process):** ```python Example from openai import OpenAI client = OpenAI( base_url="http://localhost:30000/v1", api_key="EMPTY" ) # Define available tools tools = [ { "type": "function", "function": { "name": "get_weather", "description": "Get the current weather for a location", "parameters": { "type": "object", "properties": { "location": { "type": "string", "description": "The city name" }, "unit": { "type": "string", "enum": ["celsius", "fahrenheit"], "description": "Temperature unit" } }, "required": ["location"] } } } ] # Make request with streaming to see thinking process response = client.chat.completions.create( model="zai-org/GLM-5.1-FP8", messages=[ {"role": "user", "content": "What's the weather in Beijing?"} ], tools=tools, stream=True ) # Process streaming response thinking_started = False has_thinking = False for chunk in response: if chunk.choices and len(chunk.choices) > 0: delta = chunk.choices[0].delta # Print thinking process if hasattr(delta, 'reasoning_content') and delta.reasoning_content: if not thinking_started: print("=============== Thinking =================", flush=True) thinking_started = True has_thinking = True print(delta.reasoning_content, end="", flush=True) # Print tool calls if hasattr(delta, 'tool_calls') and delta.tool_calls: # Close thinking section if needed if has_thinking and thinking_started: print("\n=============== Content =================", flush=True) thinking_started = False for tool_call in delta.tool_calls: if tool_call.function: print(f"Tool Call: {tool_call.function.name}") print(f" Arguments: {tool_call.function.arguments}") # Print content if delta.content: print(delta.content, end="", flush=True) print() ``` **Output Example:** ```text Output =============== Thinking ================= The user wants to know the weather in Beijing. I'll call the get_weather function with "Beijing" as the location. =============== Content ================= Tool Call: get_weather Arguments: Tool Call: None Arguments: { Tool Call: None Arguments: "location": "Be Tool Call: None Arguments: ijing" Tool Call: None Arguments: } ``` ## 5. Benchmark ### 5.1 Speed Benchmark **Test Environment:** - Hardware: H200 (8x) - Model: GLM-5.1-FP8 - Tensor Parallelism: 8 - SGLang Version: commit 947927bdb #### 5.1.1 Latency Benchmark ```bash Command python3 -m sglang.bench_serving \ --backend sglang \ --model zai-org/GLM-5.1-FP8 \ --dataset-name random \ --random-input-len 1000 \ --random-output-len 1000 \ --num-prompts 10 \ --max-concurrency 1 \ --request-rate inf ``` ```text Output ============ Serving Benchmark Result ============ Backend: sglang Traffic request rate: inf Max request concurrency: 1 Successful requests: 10 Benchmark duration (s): 35.78 Total input tokens: 6101 Total input text tokens: 6101 Total generated tokens: 4220 Total generated tokens (retokenized): 4213 Request throughput (req/s): 0.28 Input token throughput (tok/s): 170.54 Output token throughput (tok/s): 117.96 Peak output token throughput (tok/s): 148.00 Peak concurrent requests: 2 Total token throughput (tok/s): 288.50 Concurrency: 1.00 Accept length: 3.48 ----------------End-to-End Latency---------------- Mean E2E Latency (ms): 3576.31 Median E2E Latency (ms): 2935.97 P90 E2E Latency (ms): 5908.97 P99 E2E Latency (ms): 8588.08 ---------------Time to First Token---------------- Mean TTFT (ms): 290.88 Median TTFT (ms): 282.34 P99 TTFT (ms): 332.27 -----Time per Output Token (excl. 1st token)------ Mean TPOT (ms): 7.54 Median TPOT (ms): 6.97 P99 TPOT (ms): 9.04 ---------------Inter-Token Latency---------------- Mean ITL (ms): 7.80 Median ITL (ms): 6.81 P95 ITL (ms): 13.51 P99 ITL (ms): 26.99 Max ITL (ms): 29.50 ================================================== ``` #### 5.1.2 Throughput Benchmark ```bash Command python3 -m sglang.bench_serving \ --backend sglang \ --model zai-org/GLM-5.1-FP8 \ --dataset-name random \ --random-input-len 1000 \ --random-output-len 1000 \ --num-prompts 1000 \ --max-concurrency 100 \ --request-rate inf ``` ```text Output ============ Serving Benchmark Result ============ Backend: sglang Traffic request rate: inf Max request concurrency: 100 Successful requests: 1000 Benchmark duration (s): 411.74 Total input tokens: 502493 Total input text tokens: 502493 Total generated tokens: 500251 Total generated tokens (retokenized): 499614 Request throughput (req/s): 2.43 Input token throughput (tok/s): 1220.41 Output token throughput (tok/s): 1214.97 Peak output token throughput (tok/s): 2648.00 Peak concurrent requests: 105 Total token throughput (tok/s): 2435.38 Concurrency: 96.30 Accept length: 3.50 ----------------End-to-End Latency---------------- Mean E2E Latency (ms): 39648.76 Median E2E Latency (ms): 39058.12 P90 E2E Latency (ms): 57009.82 P99 E2E Latency (ms): 68880.33 ---------------Time to First Token---------------- Mean TTFT (ms): 20613.80 Median TTFT (ms): 21429.21 P99 TTFT (ms): 29543.17 -----Time per Output Token (excl. 1st token)------ Mean TPOT (ms): 38.73 Median TPOT (ms): 36.52 P99 TPOT (ms): 67.09 ---------------Inter-Token Latency---------------- Mean ITL (ms): 38.13 Median ITL (ms): 16.57 P95 ITL (ms): 86.01 P99 ITL (ms): 164.88 Max ITL (ms): 1307.02 ================================================== ``` ### 5.2 Accuracy Benchmark The accuracy benchmark results below are shared with GLM-5, as GLM-5.1 was not independently benchmarked at the time of this writing. A separate benchmark run is planned. #### 5.2.1 GSM8K Benchmark - Benchmark Command ```bash Command python3 benchmark/gsm8k/bench_sglang.py --port 30000 ``` - Test Result ```text Output Accuracy: 0.955 Invalid: 0.000 Latency: 32.470 s Output throughput: 642.044 token/s ``` #### 5.2.2 MMLU Benchmark - Benchmark Command ```bash Command python3 benchmark/mmlu/bench_sglang.py --port 30000 ``` - Test Result ```text Output subject: abstract_algebra, #q:100, acc: 0.860 subject: anatomy, #q:135, acc: 0.874 subject: astronomy, #q:152, acc: 0.941 subject: business_ethics, #q:100, acc: 0.880 subject: clinical_knowledge, #q:265, acc: 0.932 subject: college_biology, #q:144, acc: 0.972 subject: college_chemistry, #q:100, acc: 0.640 subject: college_computer_science, #q:100, acc: 0.900 subject: college_mathematics, #q:100, acc: 0.810 subject: college_medicine, #q:173, acc: 0.873 subject: college_physics, #q:102, acc: 0.912 subject: computer_security, #q:100, acc: 0.880 subject: conceptual_physics, #q:235, acc: 0.928 subject: econometrics, #q:114, acc: 0.807 subject: electrical_engineering, #q:145, acc: 0.897 subject: elementary_mathematics, #q:378, acc: 0.937 subject: formal_logic, #q:126, acc: 0.778 subject: global_facts, #q:100, acc: 0.710 subject: high_school_biology, #q:310, acc: 0.961 subject: high_school_chemistry, #q:203, acc: 0.847 subject: high_school_computer_science, #q:100, acc: 0.960 subject: high_school_european_history, #q:165, acc: 0.891 subject: high_school_geography, #q:198, acc: 0.960 subject: high_school_government_and_politics, #q:193, acc: 0.984 subject: high_school_macroeconomics, #q:390, acc: 0.923 subject: high_school_mathematics, #q:270, acc: 0.696 subject: high_school_microeconomics, #q:238, acc: 0.962 subject: high_school_physics, #q:151, acc: 0.821 subject: high_school_psychology, #q:545, acc: 0.956 subject: high_school_statistics, #q:216, acc: 0.889 subject: high_school_us_history, #q:204, acc: 0.941 subject: high_school_world_history, #q:237, acc: 0.945 subject: human_aging, #q:223, acc: 0.857 subject: human_sexuality, #q:131, acc: 0.908 subject: international_law, #q:121, acc: 0.934 subject: jurisprudence, #q:108, acc: 0.907 subject: logical_fallacies, #q:163, acc: 0.933 subject: machine_learning, #q:112, acc: 0.830 subject: management, #q:103, acc: 0.942 subject: marketing, #q:234, acc: 0.940 subject: medical_genetics, #q:100, acc: 0.990 subject: miscellaneous, #q:783, acc: 0.959 subject: moral_disputes, #q:346, acc: 0.873 subject: moral_scenarios, #q:895, acc: 0.837 subject: nutrition, #q:306, acc: 0.922 subject: philosophy, #q:311, acc: 0.897 subject: prehistory, #q:324, acc: 0.929 subject: professional_accounting, #q:282, acc: 0.844 subject: professional_law, #q:1534, acc: 0.714 subject: professional_medicine, #q:272, acc: 0.941 subject: professional_psychology, #q:612, acc: 0.913 subject: public_relations, #q:110, acc: 0.791 subject: security_studies, #q:245, acc: 0.878 subject: sociology, #q:201, acc: 0.940 subject: us_foreign_policy, #q:100, acc: 0.920 subject: virology, #q:166, acc: 0.596 subject: world_religions, #q:171, acc: 0.936 Total latency: 165.275 Average accuracy: 0.877 ``` ### 5.3 AMD GPU Benchmarks #### 5.3.1 GSM8K Benchmark (MI325/MI35x) - MI325/MI35x Test (GLM-5.1 BF16, `tp=8`, TileLang DSA backends) ```bash Command python3 benchmark/gsm8k/bench_sglang.py --num-questions 200 ``` ```text Output Accuracy: 0.970 Invalid: 0.000 ``` Results from [AMD nightly CI](https://github.com/sgl-project/sglang/actions/runs/22556197510/attempts/2#summary-65346783629). See also [sglang#18911](https://github.com/sgl-project/sglang/pull/18911).