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Anthropic's Claude Opus 4.8 claims AI crown as OpenAI retires GPT-4.5

By PulseAugur Editorial · [1 sources] ·

OpenAI is retiring several of its older AI models, including GPT-4.5 and o3, with GPT-4.5 being removed from ChatGPT on June 27, 2026. This move is seen as a strategic shift ahead of potential IPO plans and the release of newer models like GPT-5.5 Instant. Concurrently, Anthropic's Claude Opus 4.8 has emerged as the top-performing AI model, achieving a score of 61.4 on the Artificial Analysis Intelligence Index and outperforming GPT-5.5 on the SWE-Bench benchmark. AI

IMPACT Anthropic's Claude Opus 4.8 sets a new benchmark for AI performance, potentially pressuring OpenAI to accelerate its own model development and release strategy.

RANK_REASON Model release and retirement news from major AI labs, with performance benchmarks. [lever_c_demoted from significant: ic=1 ai=1.0]

Read on dev.to — Anthropic tag →

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

Anthropic's Claude Opus 4.8 claims AI crown as OpenAI retires GPT-4.5

How we ranked this

Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Research
Model release and retirement news from major AI labs, with performance benchmarks. [lever_c_demoted from significant: ic=1 ai=1.0]
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
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
96 days old
Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.

Full methodology in our editorial standards.

COVERAGE [1]

  1. dev.to — Anthropic tag TIER_1 English(EN) · DoremonAI ·

    GPT-4.5 Dies in 4 Days, o3 Next — and Claude Opus 4.8 Just Became the King of AI

    <p><a class="article-body-image-wrapper" href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fotjo1e667i1zzj7p5zqt.png"><img alt="Cover Image" hei…

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