ERNIE · Reasoning · ERNIE 4.5 Thinking
ERNIE 4.5 21B-A3B Thinking is a current Reasoning release in the ERNIE family, certified from its immutable official source revision.
ERNIE 4.5 21B-A3B Thinking is an official self-hostable Baidu release in the ERNIE Reasoning track. It uses Ernie4_5_MoeForCausalLM, carries 21B / 3B MoE, supports a verified context window of 131,072 tokens, and exposes only source-certified checkpoints and runtime combinations. Its release, license and deployment facts are tied to the official repository revision rather than inferred from the family name.
ERNIE 4.5 21B-A3B Thinking uses Ernie4_5_MoeForCausalLM with 21B / 3B MoE. The stored architecture profile records 28 layers, hidden width 2560, 20 attention heads and a 131,072 token context ceiling where the official configuration publishes those fields.
Only exact, source-certified variants attached to this release are shown.
baidu/ERNIE-4.5-21B-A3B-Thinking
Official · BF16 · safetensors
Runtime certified: Fastdeploy vLLM Transformers
| Precision / quantization | Format | Bits | Publisher trust | Deployment state |
|---|---|---|---|---|
| BF16 | safetensors | 16 | Official | Runtime certified |
Use only the listed fastdeploy, vllm, transformers runtime configuration with the exact checkpoint precision. The recommendation engine checks weight memory, KV cache, runtime overhead, safety headroom, GPU architecture and topology before ranking rentable and reference hardware.
Recommended best value
141 GB total VRAM · nvswitch
75.56 GB headroom · Limited capacity
USD 2,345 / monthLowest-cost viable
72 GB total VRAM · pcie
6.56 GB headroom · Available
USD 750 / monthHighest performance
141 GB total VRAM · nvswitch
75.56 GB headroom · Limited capacity
USD 2,345 / monthThe full 21B resident weight set must fit across the selected GPUs. Context and concurrency add KV-cache memory; MoE active parameters do not replace resident-weight memory.
ERNIE 4.5 21B-A3B Thinking is published under apache-2.0. The release-scoped official license link and verification date are retained with the catalogue record.
Commercial Use Allowed. The official license permits commercial use; its obligations still apply.
Source revision: aa54548a750802c4c7471b17b3a3b850f3f4b0465a2cf4c43f0d1dd9c9dc5297
The exact estimate depends on checkpoint precision, context and concurrency; the page recommendation uses the certified memory engine and compatible runtime configurations.
Certified upstream runtime evidence is available for fastdeploy, vllm, transformers.
The stored commercial classification is Commercial Use Allowed. Consult the official apache-2.0 terms for the final obligations.
Last verified: 2026-09-03
