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Microsoft and Anthropic Disagree on Claude Haiku 4.5 Retirement Date

By PulseAugur Editorial · [1 sources] ·

There is a discrepancy between Anthropic and Microsoft regarding the retirement date of the Claude Haiku 4.5 model on Microsoft Foundry. Anthropic's official deprecation page lists the model as active, with its retirement date serving as a "not sooner than" floor. However, Microsoft's Foundry model retirement schedule indicates that Claude Haiku 4.5 will be retired on November 15, 2026, following a 12-month lifecycle policy for third-party models. Developers using the model through Microsoft Foundry are advised to plan for the earlier retirement date and verify their deployments and potential replacements. AI

IMPACT Developers using Claude Haiku 4.5 on Microsoft Foundry must navigate conflicting information to avoid service disruption.

RANK_REASON Discrepancy in official documentation for a specific model's retirement date on a cloud platform.

Read on dev.to — LLM tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Microsoft and Anthropic Disagree on Claude Haiku 4.5 Retirement Date

How we ranked this

Signal score
29 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
Discrepancy in official documentation for a specific model's retirement date on a cloud platform.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, infra
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High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. dev.to — LLM tag TIER_1 English(EN) · Nabil A ·

    Two Official Pages Disagree on When Claude Haiku 4.5 Retires

    <p><strong>Microsoft's retirement schedule says <code>claude-haiku-4-5</code> retires on Microsoft Foundry this Sunday, November 15, 2026. Anthropic's deprecations page, which says its dates apply to Foundry, still lists the model as Active.</strong></p> <p>Both pages were read t…

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