GPT-5 Mini reasoning

openrouter
openai
GPT-5 Mini is a compact version of GPT-5, designed to handle lighter-weight reasoning tasks. It provides the same instruction-following and safety-tuning benefits as GPT-5, but with reduced latency and cost. GPT-5 Mini is the successor to OpenAI's o4-mini model.

Capabilities

Context Window 400k tokens
Max Output 128k tokens
Inputs
Outputs

Pricing (per 1M tokens)

Input $0.25
Output $2.00
Cache Read $0.02
Cache Write -

Supported Parameters

include_reasoningmax_tokensreasoningresponse_formatseedstructured_outputstool_choicetools

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