A Reuters-sourced report citing three sources says Anthropic is considering rolling out a new AI model to counter OpenAI's GPT-6 Astra, which has reportedly gained traction among business users; timing is under discussion ahead of an expected IPO, and Anthropic declined to comment. No model name, capabilities, or launch schedule is confirmed.

The deliberation sits in tension with CEO Dario Amodei's September 12 essay calling for an industry-wide slowdown in capability releases — a stance that drew public support from Sam Altman and Elon Musk. Some investor sources say they are re-evaluating Anthropic's enterprise position as rising interest rates sharpen focus on profitable cash flows.

UPDATE 2026-09-21: the IPO framing is amplifying — Inspirepreneur Magazine (Sept 21) reports Anthropic is weighing the model launch as part of IPO preparation, citing the Daily Star's reporting that talks are ongoing while Anthropic weighs safety evaluation and the investment needed. New concrete datapoint behind the chatter: Ramp-tracked enterprise AI spend shows roughly 13% going to GPT-6 Astra versus ~8% to Claude Fable. Still no model name, capabilities, or launch date from Anthropic.

UPDATE 2026-09-22 — CONFIRMED: Anthropic officially launched Claude Opus 5.5 on Tuesday, its first new model since the Reuters report that it was weighing a launch to counter GPT-6 Astra. Opus 5.5 arrives with Fable-level performance claims and 20%-lower pricing; see the release entry 2026-09-22-anthropic-opus-5-5-released for full details.

Update (2026-10-08): Confirmed: Anthropic completed the Claude 5.5 family — Sonnet 5.5 and Opus 5.5 arrived first, and Claude Haiku 5.5 launched October 7 with up to 90% price cuts and a new adjustable effort setting.