Unverified50% confidenceFactExact time
Both OpenAI and Anthropic have begun offering version pinning services, allowing users to continue using older versions before confirming compatibility.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
8/8/2026
First Seen
Valid until: 11/6/2026
Sources
Opus 5首体验：用一次就弃用背后的大模型迭代困境
Related Claims
UnverifiedCompanies such as OpenAI offer a "pinned model versions" feature, allowing enterprises to lock to a specific version until they actively choose to upgrade.80% similarUnverifiedThe Models page of OpenAI's official API documentation (platform.openai.com/docs/models) maintains a real-time official list of all callable models and their version descriptions.74% similarUnverifiedOpenAI's API allows developers to specify calls to a particular version (e.g., gpt-4-0613) and promises that version will remain stable within a certain period.74% similarUnverifiedIn 2025, OpenAI made significant updates to its API protocol, introducing new authentication mechanisms and request header formats, which caused the previously simple method of connecting to domestic models by replacing the BaseURL to stop working.73% similarUnverifiedFor domestic model providers not directly supported by LangChain, model_provider can be set to openai to invoke them via OpenAI-compatible mode.73% similar
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