---
title: "Anthropic reportedly keeps its most capable model internal-only"
url: https://www.parallelquant.com/posts/anthropic-reportedly-keeps-its-most-capable-model-internal-only-139a54
source_name: "The Decoder"
source_url: https://the-decoder.com/anthropic-uses-an-unpublished-ai-model-called-model-2-internally/
published: 2026-08-20T10:04:45.000Z
topics: ["llms", "products"]
publisher: "Parallel Quant"
---

# Anthropic reportedly keeps its most capable model internal-only

*2026-08-20 · Source: [The Decoder](https://the-decoder.com/anthropic-uses-an-unpublished-ai-model-called-model-2-internally/)*

According to The Decoder, Anthropic uses an unpublished model internally, codenamed "Model 2," that is more capable than any publicly released version of Claude. Details on its capabilities or a public release timeline have not been disclosed.

**Why it matters:** If accurate, this confirms what's long been suspected across frontier labs: public releases lag meaningfully behind internal capability, which matters for anyone trying to judge the true frontier of AI progress from shipped products alone. It lands amid other recent reporting on internal-only safety and risk decisions at OpenAI, suggesting the gap between what labs build and what they release is becoming a recurring theme.

**Topics:** llms, products

---
Read the original: https://the-decoder.com/anthropic-uses-an-unpublished-ai-model-called-model-2-internally/
Canonical: https://www.parallelquant.com/posts/anthropic-reportedly-keeps-its-most-capable-model-internal-only-139a54
Published by Parallel Quant — https://www.parallelquant.com