Compare the listed model data for ERNIE 4.5 21B-A3B by Baidu and ERNIE 4.5 300B-A47B by Baidu. Benchmark and pricing records are not a controlled test and may change.
Data last updated: 2026-10-16. Verify current model details with each provider.
What the listed data says
ERNIE 4.5 21B-A3B: 128K tokens; ERNIE 4.5 300B-A47B: 128K tokens. The listed context-window values are equal. ERNIE 4.5 21B-A3B is listed for no specific capability flags; ERNIE 4.5 300B-A47B is listed for coding, long-context tasks. Shared catalog benchmark entries: CMMLU (Chinese): ERNIE 4.5 21B-A3B 81.2%; ERNIE 4.5 300B-A47B 88.5%; MMLU: ERNIE 4.5 21B-A3B 72.1%; ERNIE 4.5 300B-A47B 78.3%. These records are reference data, not a controlled head-to-head test; verify current pricing and specifications with each provider.
Catalog source links
Use these model and provider links to verify current specifications, pricing, and availability.
The first listed parameter quantities are 21B total (3B active via MoE) and 300B total (47B active via MoE); the larger quantity is 14.29× the smaller. Total and active MoE parameters are not directly equivalent.
A release-date gap cannot be calculated from the catalog values (ERNIE 4.5 21B-A3B: 2025; ERNIE 4.5 300B-A47B: 2025).
Cost example: 1M input and 1M output tokens
A cost example for 1M input plus 1M output tokens cannot be calculated reliably because separate numeric input and output rates are not listed for both models.
Choose ERNIE 4.5 21B-A3B if…
Choose ERNIE 4.5 21B-A3B when your task aligns with catalog-listed uses or strengths such as Cost-efficient Chinese-English enterprise apps, Lower-resource Chinese language processing, Efficient MoE: 21B knowledge at 3B inference cost, Good Chinese-English bilingual performance for its class.
Choose ERNIE 4.5 300B-A47B if…
Choose ERNIE 4.5 300B-A47B when your task aligns with catalog-listed uses or strengths such as Enterprises serving Chinese domestic market, Chinese government and enterprise AI, Chinese-language healthcare, legal, and financial document analysis, China's most capable open-weight model for Chinese-language tasks.
Feature Comparison — ERNIE 4.5 21B-A3B vs ERNIE 4.5 300B-A47B
Catalog specifications for ERNIE 4.5 21B-A3B and ERNIE 4.5 300B-A47B
Specification
ERNIE 4.5 21B-A3B
ERNIE 4.5 300B-A47B
Provider
Baidu
Baidu
Parameters
21B total (3B active via MoE)
300B total (47B active via MoE)
Context window
128K tokens
128K tokens
Maximum output
Not listed
Not listed
Catalog pricing
ERNIE Model License
ERNIE Model License — free for research; commercial terms apply
Listed input/output cost per 1M tokens
Separate numeric input/output rates not listed
Separate numeric input/output rates not listed
License
ERNIE Model License
ERNIE Model License
Coding support
Not listed
Listed
Reasoning support
Not listed
Not listed
Vision input
Not listed
Not listed
Multimodal
Not listed
Not listed
Open weights
Yes
Yes
Benchmark: CMMLU (Chinese)
81.2%
88.5%
Benchmark: MMLU
72.1%
78.3%
Figures are transcribed from LITHOVEX model records. Benchmark versions and evaluation setups may differ; pricing and specifications can change. Check each provider's current documentation before making a decision.
Frequently Asked Questions
What is different between ERNIE 4.5 21B-A3B and ERNIE 4.5 300B-A47B?
ERNIE 4.5 21B-A3B: 128K tokens; ERNIE 4.5 300B-A47B: 128K tokens. The listed context-window values are equal. ERNIE 4.5 21B-A3B is listed for no specific capability flags; ERNIE 4.5 300B-A47B is listed for coding, long-context tasks. Shared catalog benchmark entries: CMMLU (Chinese): ERNIE 4.5 21B-A3B 81.2%; ERNIE 4.5 300B-A47B 88.5%; MMLU: ERNIE 4.5 21B-A3B 72.1%; ERNIE 4.5 300B-A47B 78.3%. These records are reference data, not a controlled head-to-head test; verify current pricing and specifications with each provider.
What benchmark values are listed for ERNIE 4.5 21B-A3B and ERNIE 4.5 300B-A47B?
CMMLU (Chinese): ERNIE 4.5 21B-A3B 81.2%; ERNIE 4.5 300B-A47B 88.5%; MMLU: ERNIE 4.5 21B-A3B 72.1%; ERNIE 4.5 300B-A47B 78.3%. The catalog values may use different versions and evaluation setups, so they are reference points rather than a controlled head-to-head result.
Which model has the larger listed context window?
ERNIE 4.5 21B-A3B: 128K tokens; ERNIE 4.5 300B-A47B: 128K tokens. The listed context-window values are equal.
What are the listed costs per million tokens for ERNIE 4.5 21B-A3B and ERNIE 4.5 300B-A47B?
ERNIE 4.5 21B-A3B: Separate numeric input/output rates not listed (ERNIE Model License). ERNIE 4.5 300B-A47B: Separate numeric input/output rates not listed (ERNIE Model License — free for research; commercial terms apply). Where separate numeric input and output rates are available, the worked example uses 1M input plus 1M output tokens. Confirm current terms with each provider.
How far apart are the listed release dates for ERNIE 4.5 21B-A3B and ERNIE 4.5 300B-A47B?
The catalog lists ERNIE 4.5 21B-A3B as 2025 and ERNIE 4.5 300B-A47B as 2025; a release-date gap cannot be calculated from both records.
When was the comparison data last updated?
The model catalog records 2026-10-16 as its data update date. Provider specifications and prices may have changed since then.
How should I choose between ERNIE 4.5 21B-A3B and ERNIE 4.5 300B-A47B?
Compare the listed specifications and capabilities, review the benchmark notes, then test both with the same representative prompt for your task. This page does not claim a universal winner.
Create your free LITHOVEX account and compare ERNIE 4.5 21B-A3B and ERNIE 4.5 300B-A47B on your actual tasks. No credit card, no API key, no subscriptions needed.