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gpt-oss-20b

OPENAI Developer Architecture Profile

OpenRouter ↗HuggingFace ↗
Intelligence (ELO)1039Chatbot Arena Verified
Max Context131,072Tokens
API Cost / 1M$0.16Blended 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)$0.03 / 1M
    Output Tokens (Completion)$0.13 / 1M

    Pricing data via OpenRouter. Sync: 8/1/2026

    Evaluate Competitors

    VS Engine Matchupgpt-oss-20b vs OpenRouter: FusionVS Engine Matchupgpt-oss-20b vs Xiaomi: MiMo-V2.5VS Engine Matchupgpt-oss-20b vs Microsoft: Phi 4VS Engine Matchupgpt-oss-20b vs NVIDIA: Nemotron 3 Super (free)VS Engine Matchupgpt-oss-20b vs OpenAI: gpt-oss-20b (free)VS Engine Matchupgpt-oss-20b vs Qwen: Qwen2.5 7B Instruct