# Anthropic led AI model rankings at end of October

*Science. 66% certain. Friday, 1 January 2027*

> Speculative fiction assembled from prediction-market prices. This has not happened.

**OpenAI remained independent and stayed below a $2 trillion valuation.**

Anthropic's AI model was judged the best among major rivals at the close of October 2026. OpenAI did not reach a $2 trillion valuation by the end of the year. The company also remained independent and stayed headquartered in its home country.

The assessment was finalized on Sunday, 1 November, after a review of model performance across the sector. The result placed Anthropic at the top of the AI model hierarchy for October.

The figure remained under the $2 trillion mark, falling short of the high target set for the year. The shortfall was noted alongside the company's broader financial performance.

On the same day, OpenAI's corporate status was examined for potential acquisition. The review confirmed that no purchase agreement had been completed before 2027. The company therefore continued operating as an independent entity.

A separate inquiry on Tuesday, 10 November, looked at whether OpenAI, Google DeepMind or Anthropic had relocated their legal domicile from the United States or United Kingdom. The investigation found that none of the three firms had changed their primary jurisdiction before 2027. Their headquarters remained in their original countries.

## Analysis

Competitors may need to accelerate development to close the gap, influencing the pace of innovation across the sector.

Remaining independent could preserve strategic flexibility but also limits the financial boost an acquisition might have provided.

The lack of de-domiciling and the absence of an acquisition indicate that the major AI firms are maintaining their existing regulatory and operational frameworks.

## What this was built from

- **Will Anthropic's valuation hit (HIGH) $3.0T by December 31?**: No, 80%; settles Friday, 1 January 2027 (polymarket). [Market](https://polymarket.com/event/will-anthropics-valuation-hit-by-december-31)
- **Which company has best AI model end of 2026?**: Anthropic, 66%; settles Friday, 1 January 2027 (polymarket). [Market](https://polymarket.com/event/which-company-has-best-ai-model-end-of-2026)
- **Will Anthropic's valuation hit (HIGH) $1.75T by December 31?**: Yes, 81%; settles Friday, 1 January 2027 (polymarket). [Market](https://polymarket.com/event/will-anthropics-valuation-hit-by-december-31)
- **Which company has the best AI model end of October?**: Anthropic, 85%; settles Sunday, 1 November 2026 (polymarket). [Market](https://polymarket.com/event/which-company-has-the-best-ai-model-end-of-october)
- **Will OpenAI, Google Deepmind or Anthropic de-domicile from the UK/US before 2027?**: No, 93%; settles Tuesday, 10 November 2026 (manifold). [Market](https://manifold.markets/NathanpmYoung/will-openai-google-deepmind-or-anth)
- **Will OpenAI's valuation hit (HIGH) $2.0T by December 31?**: No, 85%; settles Friday, 1 January 2027 (polymarket). [Market](https://polymarket.com/event/will-openais-valuation-hit-by-december-31)
- **Will OpenAI be acquired before 2027?**: No, 98%; settles Friday, 1 January 2027 (polymarket). [Market](https://polymarket.com/event/which-companies-will-be-acquired-before-2027)