Baidu: ERNIE 4.5 21B A3B Thinking

BAIDU Developer Architecture Profile

Intelligence (ELO)1418Chatbot Arena Verified

Max Context131,072Tokens

API Cost / 1M$0.35Blended Prompt + Completion

Model Capabilities

Coding & Logic
Fictional

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 academic benchmarks.

Granular Pricing Matrix

Input Tokens (Prompt)$0.07 / 1M

Output Tokens (Completion)$0.28 / 1M

Pricing data via OpenRouter. Sync: 4/30/2026

Evaluate Competitors

VS Engine MatchupBaidu: ERNIE 4.5 21B A3B Thinking vs NVIDIA: Nemotron 3 Nano Omni (free)VS Engine MatchupBaidu: ERNIE 4.5 21B A3B Thinking vs Arcee AI: Trinity Large Preview VS Engine MatchupBaidu: ERNIE 4.5 21B A3B Thinking vs NVIDIA: Nemotron 3 Nano 30B A3B (free)VS Engine MatchupBaidu: ERNIE 4.5 21B A3B Thinking vs Qwen: Qwen3 VL 235B A22B Thinking VS Engine MatchupBaidu: ERNIE 4.5 21B A3B Thinking vs Xiaomi: MiMo-V2.5 VS Engine MatchupBaidu: ERNIE 4.5 21B A3B Thinking vs inclusionAI: Ling-2.6-flash