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OpenAI to retire GPT-5 and o3 models by December 2026

By PulseAugur Editorial · [1 sources] ·

OpenAI has announced that several older models, including GPT-5 and o3 variants, will be shut down on December 11, 2026. This deprecation affects both base models and their fine-tuned versions, as well as specific pro models. Developers are advised to identify all usage of these models, map them to their replacements such as GPT-5.6-sol, GPT-5.6-terra, and GPT-5.6-luna, and thoroughly re-test functionalities like tool calls and structured outputs before the deadline. Staged rollouts and post-shutdown monitoring are recommended to ensure a smooth transition. AI

IMPACT Developers using older OpenAI models must migrate to newer versions by December 2026 to avoid service disruptions.

RANK_REASON This is a deprecation notice for existing models, not a new release or significant industry event.

Read on dev.to — LLM tag →

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

OpenAI to retire GPT-5 and o3 models by December 2026

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Signal score
32 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
This is a deprecation notice for existing models, not a new release or significant industry event.
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
model release, product
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AI-industry relevance
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) · AI Deprecations ·

    What to Do Before OpenAI GPT-5 and o3 Shut Down on December 11, 2026

    <p>OpenAI removes <code>gpt-5</code>, <code>gpt-5-mini</code>, <code>gpt-5-nano</code>, <code>gpt-5-pro</code>, <code>o3</code>, <code>o3-pro</code> and their dated snapshots from the API on <strong>Dec 11, 2026</strong> (announced Jun 11, 2026).</p> <blockquote> <p>Free Mon/Wed/…

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