Model overview
~14T param, 114 layers, hybrid GDN/MLA, MoE (1,224 experts, top-48 + 1 shared), NVFP4. Internal codename `numbat`, Anthropic's next Mythos-class training run. `numbat` is the codename referenced in the Claude Code source leak (Mar 2026). This is a checkpoint from that training run, pulled mid-pretraining. The 772 shards total ~7.72 TB of tensor data. Each shard is safetensors format, under 10.6 GB per file. `configuration_numbat.py` and `modeling_numbat.py` are included: a complete reference implementation of the checkpoint. Its module tree has an exact slot for every tensor in every shard, so the full checkpoint loads with `load_state_dict(strict=True)` (and, since the classes derive from `PreTrainedModel`, also via `AutoModelForCausalLM.from_pretrained(..., trust_remote_code=True)`). `NumbatForCausalLM.forward` runs the trunk and `NumbatForCausalLM.draft` runs the MTP layer.
Key features
特点摘要待依据来源补齐，不凭模型名称推断能力。
Limitations & considerations
Sources are insufficient to establish specific limitations. Verify task performance, latency, data policies, licensing and version lifecycle.
Source prices & cost analysis
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| Source / channel | Input | Output | Billing unit | Collected at |
|---|---|---|---|---|
| No verified prices yet. Check the source channel. | ||||
Estimate monthly base token costs
Estimates exclude cache discounts, tiered pricing, multimodal surcharges, web search, taxes and additional reasoning output.
Public benchmarks & run configuration
暂无已采集的可核验公开评分。模型未上榜不代表能力较低。
View full indexed rankings →Frequently asked questions
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Sources & traceability
许可证：来源未披露，须进一步核验。模型介绍与第三方评测均以原来源的具体版本和方法为准。