Developing story · 2 episodes · 1 Nov to 3 Nov
Anthropic and OpenAI Race Toward Next Generation Models
Reports indicate that major AI labs are actively developing and testing their upcoming flagship models, including Anthropic's Fable 5.5 and OpenAI's GPT-6.2 Astra. The latest developments suggest both companies are in the final stages of preparing these top-tier systems for release.
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Anthropic and OpenAI may be testing Fable 5.5 and GPT-6.2 Astra
Leaked data suggests Anthropic and OpenAI are preparing their next-generation models simultaneously. A catalog entry for "Fable 5.5" appeared on Anthropic's platform on October 13, 2026, but was…
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Anthropic may have a new top-tier model in the works, report says
A hidden reference on Anthropic's website lists Claude Mythos 5.5 as its most capable model class for cybersecurity and biology research. The article states there was no keynote or launch blog post,…
2 sources
Who and what
AnthropicOpenAIClaude Mythos 5.5Mythos 5Mythos 5.1Opus 5.5Opus 4.8Fable 5Fable 5.5GPT-6.2 AstraGPT-6 AstraDiego Almada Lopez