GPT-5

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openai llm
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The base GPT-5 model, offering broad general-purpose language understanding and generation.

context window 272K tokens
max output 128K tokens
input price $1.75 / 1M tokens
output price $14 / 1M tokens
streamingcode-generationfunction-callingjson-modetool-usevisionprompt-cachingreasoning
releasedAug 2025
knowledge cutoffApr 2025