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gpt-oss-20b (free)

OPENAI Developer Architecture Profile

OpenRouter ↗HuggingFace ↗
Intelligence (ELO)1036Chatbot Arena Verified
Max Context131,072Tokens
API Cost / 1MFREEBlended Prompt + Completion

Model Capabilities

    gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...

    Granular Pricing Matrix

    Input Tokens (Prompt)Free / 1M
    Output Tokens (Completion)Free / 1M

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

    Evaluate Competitors

    VS Engine Matchupgpt-oss-20b (free) vs LiquidAI: LFM2-24B-A2BVS Engine Matchupgpt-oss-20b (free) vs Tencent: Hy3 preview (free)VS Engine Matchupgpt-oss-20b (free) vs Baidu: Qianfan-OCR-Fast (free)VS Engine Matchupgpt-oss-20b (free) vs NVIDIA: Nemotron 3 Super (free)VS Engine Matchupgpt-oss-20b (free) vs Amazon: Nova Micro 1.0VS Engine Matchupgpt-oss-20b (free) vs Mistral: Mistral 7B Instruct v0.1