fix(models): correct max_input_tokens for GPT-5 models (#19056)

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OpenAI's 400k context window is split between input and output:
- GPT-5/5.1/5.2 models: 272k input + 128k output = 400k context
- GPT-5-pro models: 128k input + 272k output = 400k context

Reference: https://openai.com/index/introducing-gpt-5-for-developers/
"In the API, all GPT-5 models can accept a maximum of 272,000 input
tokens and emit a maximum of 128,000 reasoning & output tokens"

Fixes incorrect 400k max_input_tokens values across 32 models.

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Cesar Garcia 2026-01-14 10:31:23 -03:00 • committed by GitHub

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model_prices_and_context_window.json

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