Baidu: ERNIE 4.5 21B A3B Thinking.
ERNIE-4.5-21B-A3B-Thinking is Baidu's upgraded lightweight MoE model, refined to boost reasoning depth and quality for top-tier performance in logical puzzles, math, science, coding, text generation, and expert-level aca
1× Nvidia RTX A4000 · $0.026/hr.
Most-aggressive quantisation we have a working recommendation for. Lower precision = less VRAM = cheaper hardware, at a small accuracy cost.
Cheapest hosted endpoints.
| Provider | Access | $/M in | $/M out | |
|---|---|---|---|---|
| OpenRouter | api aggregator | $0.07 | $0.28 | Launch ↗ |
Frequently asked.
How do I run Baidu: ERNIE 4.5 21B A3B Thinking?
Where can I access Baidu: ERNIE 4.5 21B A3B Thinking?
How much does it cost to run Baidu: ERNIE 4.5 21B A3B Thinking?
Is Baidu: ERNIE 4.5 21B A3B Thinking open-source or proprietary?
Cheapest hardware per quantisation.
Each row is one quantisation tier (the same weights compressed differently). Lower precision → lower VRAM → cheaper hardware, at the cost of small accuracy loss. $/hr refreshed hourly from each provider's API.
| Quantisation | Cheapest GPU config | Total VRAM | Live $/hr | tokens/sec | |
|---|---|---|---|---|---|
|
FP16
FP16 — half precision (default)
|
64 GB | — | — | Compare → | |
|
FP8
FP8 — 8-bit float (Hopper / Blackwell)
|
32 GB | $0.023/hr | — | Compare → | |
|
INT4
INT4 — 4-bit integer (~4× VRAM saving)
|
16 GB | $0.026/hr | — | Compare → |
What it costs per month across providers.
Estimate your monthly bill for Baidu: ERNIE 4.5 21B A3B Thinking across every host that publishes per-token pricing. Slide your token volumes; the chart + table re-rank cheapest-first.
Cheapest provider on the left.
Total monthly cost — input + output tokens combined.
Bill breakdown.
| Provider | Monthly total | |
|---|---|---|
| $1.26 | Sign up ↗ |
Rent the GPU instead of paying per token.
For an open-weights model like Baidu: ERNIE 4.5 21B A3B Thinking, you can rent a GPU and serve inference yourself. The math: cheapest GPU rental × 730 hours/month + your electricity rate × power draw.
Assumes the GPU runs 24/7 at ~85% utilisation. If your traffic is bursty, you'll pay less for the API and probably more for the GPU (idle hours still cost rental). The breakeven analysis lives on the Self-host vs API breakeven tool.