Recipe
gpt-oss-20b-mxfp4-dgx-spark-gb10-128gb-vllm-tp1
gpt-oss-20b-mxfp4-dgx-spark-gb10-128gb-vllm-tp1Observed LocalMaxxing leaderboard run. Evidence for compatibility, not an executable launch contract.
Record
- Status
- candidate
- Source
- localmaxxing
- Engine
- vllm
- Accelerators
- 1
- Tensor parallel
- 1
- Context tokens
- 32,768
- Max concurrency
- 8
- chat
- unknown
- reasoning
- unknown
- tools
- unknown
- vision
- unknown
Hugging Face model card
Identity
https://huggingface.co/openai/gpt-oss-20b- Repository
- openai/gpt-oss-20b
- Status
- known
- Link type
- Exact Hub repository
Public Hugging Face repository confirmed by the Hub API.
Candidate: useful compatibility or speed evidence. The registry does not offer Run until promotion requirements are met.
Observed configuration
vllm
Evidence only · candidate · reference
Candidate evidence — not a Run contract
Observed source tokens
Mechanical split of the source command. Unverified against the engine CLI. The registry does not offer Run for this recipe.
vllmserveopenai/gpt-oss-20b--served-model-nametriage--gpu-memory-utilization0.26--enable-prefix-caching--max-model-len32768--max-num-seqs8--reasoning-parseropenai_gptoss--tool-call-parseropenai--enable-auto-tool-choice--host0.0.0.0--port8105
| Flag | Value |
|---|---|
--served-model-name | triage |
--gpu-memory-utilization | 0.26 |
--max-model-len | 32768 |
--max-num-seqs | 8 |
--reasoning-parser | openai_gptoss |
--tool-call-parser | openai |
--host | 0.0.0.0 |
--port | 8105 |
Measured speed
| Concurrency | Context | Prefill | Decode | TTFT ms | Status | Sweep |
|---|---|---|---|---|---|---|
| 8 | 32,768 | 29,476 | 317.6 | 145.2 | observed | gpt-oss-20b-mxfp4-dgx-spark-gb10-128gb-vllm-tp1-sweep |
Remaining fields
Identity, launch, related records, and measured speed are shown above. This is the rest of the normalized record.
- hardware count
- 1
- hardware id
- dgx-spark-gb10-128gb
- id
- gpt-oss-20b-mxfp4-dgx-spark-gb10-128gb-vllm-tp1
- model instance id
- openai-gpt-oss-20b--mxfp4
- recipe source
- localmaxxing
- schema version
- local-ai-registry/v1
- speed sweep ids
- gpt-oss-20b-mxfp4-dgx-spark-gb10-128gb-vllm-tp1-sweep
- status
- candidate
capabilities
draft launch
- accelerator backend
- nvidia
- arguments
- --model, openai/gpt-oss-20b, --tensor-parallel-size, 1, --host, 0.0.0.0, --port, 8000, --max-model-len, 32768
- container port
- 8,000
- host port
- 8,000
- image
- vllm/vllm-openai@sha256:0a51ea5b4ae2dc5d81890e5173f54203d2a3ae0cfffe51b8fd2afd4391bfd967
- ipc
- host
- kind
- docker
- shm size
- 16g
- synthesized · generated at
- 2026-08-31T22:12:17Z
- synthesized · image provenance
- deepseek-fp8-rtx-pro-6000-blackwell-96gb-vllm-tp1
- synthesized · template
- vllm-openai-v1
mounts
| read only | target |
|---|---|
| No | /root/.cache/huggingface |
engine
- name
- vllm
serving
- max concurrency
- 8
- max context tokens
- 32,768
- tensor parallel
- 1
Provenance & metadata (3)
facts
- capabilities.chat · provenance · captured at
- 2026-08-30T09:26:09Z
capabilities.chat · reason capability-not-verified
capabilities.chat · state unknown
- capabilities.reasoning · provenance · captured at
- 2026-08-30T09:26:09Z
capabilities.reasoning · reason capability-not-verified
capabilities.reasoning · state unknown
- capabilities.tools · provenance · captured at
- 2026-08-30T09:26:09Z
capabilities.tools · reason capability-not-verified
capabilities.tools · state unknown
- capabilities.vision · provenance · captured at
- 2026-08-30T09:26:09Z
capabilities.vision · reason capability-not-verified
capabilities.vision · state unknown
- engine.graph mode · provenance · captured at
- 2026-08-30T09:26:09Z
engine.graph mode · reason runtime-detail-not-published
engine.graph mode · state unknown
- serving.kv cache tokens · provenance · captured at
- 2026-08-30T09:26:09Z
serving.kv cache tokens · reason kv-cache-capacity-not-published
serving.kv cache tokens · state unknown
metadata
- localmaxxing · backend
- cuda
- localmaxxing · hardware label
- GB10 Grace Blackwell
- localmaxxing · notes
- gpt-oss-20b (MXFP4 MoE) on GB10 Grace Blackwell 128GB unified memory. Conthroughput run: 8 concurrent requests (saturates max-num-seqs=8), 128 output tokens each. 2 warmup + 3 measured batches, median reported. Aggregate output 317.63 tok/s (6.5x single-stream 49.19). Per-stream decode 39.84 tok/s under load. Very consistent: 312.36-317.69 tok/s. Low gpu-memory-utilization (0.26) leaves headroom for co-tenant embedding/rerank models.
- localmaxxing · observed command
- vllm serve openai/gpt-oss-20b --served-model-name triage --gpu-memory-utilization 0.26 --enable-prefix-caching --max-model-len 32768 --max-num-seqs 8 --reasoning-parser openai_gptoss --tool-call-parser openai --enable-auto-tool-choice --host 0.0.0.0 --port 8105
- localmaxxing · run id
- cms0knudw007gs201l6iy4vnb
- localmaxxing · tokenized · arguments
- vllm, serve, openai/gpt-oss-20b, --served-model-name, triage, --gpu-memory-utilization, 0.26, --enable-prefix-caching, --max-model-len, 32768, --max-num-seqs, 8, --reasoning-parser, openai_gptoss, --tool-call-parser, openai, --enable-auto-tool-choice, --host, 0.0.0.0, --port, 8105
- localmaxxing · tokenized · fidelity
- faithful
provenance
- captured at
- 2026-08-30T09:26:09Z
sources
| captured at | kind | url |
|---|---|---|
| 2026-08-30T09:26:09Z | normalized-recipe | www.localmaxxing.com/en/runs/cms0knudw007gs201l6iy4vnb ↗ |