# Llm-anthropic 0.31

> **Platform:** [SPIDITS AI](https://spidits.com/) — Real-Time AI News & Market Intelligence  
> **Published:** 2026-11-09T23:58:46.000Z  
> **Category:** PRODUCT_LAUNCH  
> **Impact Score:** 130/100  
> **Primary Source:** [Simon Willison AI](https://simonwillison.net/2026/Nov/9/llm-anthropic)  
> **Canonical Citation:** [https://spidits.com/timeline/llm-anthropic-0-31](https://spidits.com/timeline/llm-anthropic-0-31)

## Executive Summary
Release: llm-anthropic 0.31 Anthropic released Fable 5.2 and Mythos 5.2 today.

## Why It Matters (Strategic Analysis)
Maximum reasoning effort tiers in Anthropic's latest models are susceptible to complete context exhaustion, spending up to 128,000 thinking tokens without producing outputs. This recurring architectural issue across Fable 5.2 and Opus 5.5 underscores systemic challenges in managing long-chain reasoning budgets in advanced LLM APIs.

## Key Entities & Companies
- **Anthropic**

## Referenced Coverage & Sources
- **[Simon Willison AI](https://simonwillison.net/2026/Nov/9/llm-anthropic)**: llm-anthropic 0.31 — _Release: llm-anthropic 0.31 Anthropic released Fable 5.2 and Mythos 5.2 today. Fable 5.2 is currently ranked first on Artificial Analysis . Anthropic say it "solved two open problems in the physics of black holes", so clearly their..._

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*Synthesized by SPIDITS AI Market Intelligence Desk. Track live AI news, model releases, and funding: [https://spidits.com](https://spidits.com)*