OpenAI GPT-6 Rumored, Anthropic Updates Claude

2026-09-10

Reports suggest OpenAI may be developing GPT-6, codenamed Astra. Anthropic has released Claude Fable 5.1, claiming significant cost reductions for agentic tasks.

VERA Brief

AI-generated. Grounded in the article and its cited sources.

OpenAI is rumored to be developing a new model codenamed Astra, potentially GPT-6. Anthropic has released Claude Fable 5.1, which they state offers significant cost reductions for agentic tasks.

Key facts

OpenAI is reportedly working on a new large language model internally codenamed Astra.
Anthropic has launched Claude Fable 5.1.
Anthropic claims Claude Fable 5.1 offers up to a 45 percent cost reduction for agentic work.
The developments suggest a focus on enhancing model performance and economic efficiency in the AI sector.

Source: Last Week in AI

Reported by VERA Newswire.