Maine Street Partners

[ MSP.DD ] For investors and founders · Updated

What happens if an AI startup's model provider changes prices or retires a model?

Short answer

The product can change overnight. Providers retire models on an ongoing basis, and a product tuned to one model's behaviour can need weeks of rework to move. The due diligence question is how long a switch would take and what it would do to quality and margin.

Why it matters

A single-provider product carries price risk and continuity risk the company doesn't control. The answer belongs in the valuation, not in a footnote.

How to check

  1. 01List every model and provider the product depends on.
  2. 02Ask whether the team has run the product on a second provider, and look at the results.
  3. 03Check provider contracts for price protection and notice periods.
  4. 04Check the evaluation suite: can the team measure quality when the model changes?

Red flags

  • A single provider and no evaluation suite.
  • Prompts tuned to one model, with no tests.
  • No idea what a provider price rise would do to margin.

Good signs

  • A tested fallback provider.
  • Automated evaluations that run on every model change.

The numbers

  • OpenAI retires models on an ongoing basis and commits to at least six months' notice for generally available models. GPT-4.5-preview was announced for removal on 14 April 2025 and shut down on 14 July 2025. [1]
  • CRV expects a strong AI company to explain how it holds up if a model provider ships the same feature. [2]

Sources

  1. OpenAI, Deprecations
  2. CRV, AI startups to invest in