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Baidu: ERNIE 4.5 21B A3B Thinking

BAIDU Developer Architecture Profile

OpenRouter ↗HuggingFace ↗
Intelligence (ELO)1150Chatbot Arena Verified
Max Context131,072Tokens
API Cost / 1M$0.35Blended Prompt + Completion

Model Capabilities

    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: 3/16/2026

    Evaluate Competitors

    VS Engine MatchupBaidu: ERNIE 4.5 21B A3B Thinking vs ByteDance Seed: Seed-2.0-LiteVS Engine MatchupBaidu: ERNIE 4.5 21B A3B Thinking vs Qwen: Qwen3.5-35B-A3BVS Engine MatchupBaidu: ERNIE 4.5 21B A3B Thinking vs Qwen: Qwen3.5-FlashVS Engine MatchupBaidu: ERNIE 4.5 21B A3B Thinking vs MiniMax: MiniMax M2.5 (free)VS Engine MatchupBaidu: ERNIE 4.5 21B A3B Thinking vs MiniMax: MiniMax M2.5VS Engine MatchupBaidu: ERNIE 4.5 21B A3B Thinking vs StepFun: Step 3.5 Flash (free)