Agents-A1 NVFP4

This repository contains an NVIDIA ModelOpt NVFP4 quantization of InternScience/Agents-A1, a 35B Qwen3.5 MoE agentic model.

Credits and Attribution

This NVFP4 checkpoint is derived from InternScience/Agents-A1.

• Base model: InternScience, for the Agents-A1 model, training recipe, technical report, and original BF16 Hugging Face release.
• Quantization tooling: NVIDIA, for NVIDIA TensorRT Model Optimizer / NVIDIA ModelOpt, used to produce the NVFP4 ModelOpt checkpoint.
• Model architecture and runtime ecosystem: Hugging Face Transformers, Safetensors, Accelerate, and the Hugging Face Hub.
• Calibration data: CNN/DailyMail via Hugging Face Datasets, used for text-path post-training calibration.
• Inference ecosystem: vLLM/SGLang compatibility is inherited from the Qwen3.5 MoE / ModelOpt NVFP4 ecosystem, subject to runtime support and validation.

Quantization Summary

Quantization Policy

Agents-A1 is a hybrid Qwen3.5 MoE model with 30 linear_attention layers, 10 full-attention layers, 256 experts per layer, and a vision tower. This checkpoint uses an MLP/MoE-only NVFP4 policy for the first release.

The following module families were explicitly excluded from NVFP4 quantization and preserved in BF16:

[
  "*visual*",
  "*vision*",
  "*patch_embed*",
  "*pos_embed*",
  "*merger*",
  "*linear_attn*",
  "*linear_attention*",
  "*self_attn*",
  "*attn*",
  "*embed_tokens*",
  "*lm_head*",
  "*mtp*"
]

Rationale:

• The MoE/MLP expert layers are the largest parameter family and are the correct target for NVFP4 compression.
• The GDN/linear_attn path is not standard dense transformer attention and is excluded for compatibility.
• Vision modules are preserved to avoid multimodal degradation from text-only calibration.
• Embeddings, lm_head, and MTP-sensitive modules are preserved in BF16.

Files

• hf_quant_config.json — ModelOpt quantization metadata used by compatible inference engines.
• modelopt_exclusions.json — exact exclusion list used during quantization.
• config.json, tokenizer, and processor files are copied from the base model and patched only as required for export consistency.

Validation Status

This release is a quantized checkpoint, not a new fine-tune. It does not claim quality improvement over BF16.

Runtime smoke testing on NVIDIA GB10 / SM121 completed with the companion container recipe at r0b0tlab/agents-a1-nvfp4-sm121-vllm.

Validated evidence includes:

1. Container audit on NVIDIA GB10 with CUDA capability [12, 1].
2. vLLM extension imports: vllm._C, vllm._C_stable_libtorch, vllm._moe_C.
3. Native FP4 support checks: cutlass_scaled_mm_supports_fp4(121) and (120) return true.
4. Runtime log selection of FlashInferCutlassNvFp4LinearKernel and FLASHINFER_CUTLASS for NVFP4/MoE.
5. OpenAI-compatible /v1/models and /v1/chat/completions probes against the running container.
6. Lightweight live-container benchmark evidence in the companion repo: GSM8K 50-question lm-eval run at 98.00% exact match, direct HumanEval 50-question run at 48/50 (96.00%), c1/c2/c4/c8 concurrency sweep with 100% request success, and GPU telemetry including power draw.

Benchmark snapshot

The benchmark run agents-a1-nvfp4-gsm8k50-humaneval50-20260701T194211Z used the live OpenAI-compatible endpoint at http://127.0.0.1:18080/v1 with chat_template_kwargs.enable_thinking=false for scored requests.

Combined telemetry across GSM8K, HumanEval, and direct HumanEval averaged 27.88 W GPU power draw, 70.75% GPU utilization, and 58.83°C, with maxima of 36.00 W, 96.00%, and 65.00°C over 166 telemetry samples. The c8 concurrency sweep completed 24/24 requests successfully. See the companion repo's benchmarks/agents-a1-nvfp4-gsm8k50-humaneval50-20260701T194211Z/ directory for raw logs, samples, summaries, telemetry CSVs, and MANIFEST.sha256.

SM121 container quick start

docker run --rm --gpus all --ipc=host \
  --name agents-a1-nvfp4-vllm \
  -p 18080:8000 \
  -e MODEL_ID=r0b0tlab/Agents-A1-NVFP4 \
  ghcr.io/r0b0tlab/agents-a1-nvfp4-sm121-vllm:latest

For fully pinned local reproduction, clone/download this model and mount it read-only:

docker run --rm --gpus all --ipc=host \
  --name agents-a1-nvfp4-vllm \
  -p 18080:8000 \
  -v /path/to/Agents-A1-NVFP4:/models/Agents-A1-NVFP4:ro \
  ghcr.io/r0b0tlab/agents-a1-nvfp4-sm121-vllm:latest

Limitations

• Calibration is text-only; vision components are preserved in BF16 rather than calibrated.
• This card does not claim benchmark parity until BF16-vs-NVFP4 evaluations are published.
• Runtime support depends on the inference engine's ModelOpt/NVFP4 implementation.

Citation

@misc{internscience_agents_a1_2026,
  title = {Agents-A1: Scaling the Horizon, Not the Parameters: Reaching Trillion-Parameter Performance with a 35B Agent},
  author = {InternScience},
  year = {2026},
  url = {https://huggingface.co/InternScience/Agents-A1}
}

License

This quantized checkpoint follows the base model license, Apache-2.0. Users must also comply with the licenses and terms for the base model, calibration data, NVIDIA ModelOpt, Hugging Face libraries, and any inference runtime used.