OpenAI's valuation has climbed to $933 billion, a 20% increase over the past three months, as investor interest rebounds in secondary markets. The surge comes as new GPT-5.6 models and Codex gains traction, but Anthropic remains the top private AI bet.
TL;DR
- OpenAI's valuation reaches $933B, up 20% in three months, driven by GPT-5.6 and Codex.
- Anthropic still commands higher investor interest and a $1.2T valuation.
- Investors see OpenAI as a value play, but competition from Anthropic and others poses risks.
What happened
OpenAI is experiencing renewed investor demand in private secondary markets, with its valuation rising to approximately $933 billion, a 20% increase over the past three months, according to Caplight data. This resurgence follows a difficult start to the year, marked by concerns over slowing growth, executive departures, and competition from Anthropic. Dave McClure, founder and managing partner at Practical Venture Capital, noted that OpenAI has seen a 'resurgence' in investor interest. Despite this, Anthropic remains the preferred AI investment, with buyer demand favoring it by roughly five buyers for every two seeking OpenAI shares, as reported by Glen Anderson, CEO of Rainmaker Securities.
Several secondary market participants attributed the renewed interest in OpenAI to its recent product launches, particularly the preview and expansion of GPT-5.6 Sol, GPT-5.6 Terra, and the lower-cost GPT-5.6 Luna. While GPT-5.6 Sol is ranked among the industry's top models, Anthropic's latest Mythos and Fable models still lead in some evaluations. Additionally, OpenAI's disclosure that Codex and ChatGPT Work have reached 9 million active users has bolstered investor confidence.
Why it matters
This rebound in OpenAI's valuation and investor interest signals a potential shift in market sentiment, highlighting the company's ability to regain momentum through product innovation. For developers and startups, this could mean increased opportunities for collaboration and investment. However, the competitive landscape remains intense, with Anthropic and other AI startups, including those from China, posing significant challenges.
For investors, OpenAI's valuation surge presents a potential value play, but it also comes with risks. The company faces ongoing competition from Anthropic, which commands a higher valuation and stronger investor interest. Additionally, the pressure from open-source models and other AI startups could continue to impact OpenAI's growth and margins. As such, investors must carefully weigh the opportunities and risks associated with both OpenAI and Anthropic.
Key facts
- OpenAI's valuation has risen to $933 billion, up 20% in the past three months, according to Caplight data.
- Anthropic's valuation stands at approximately $1.2 trillion in secondary markets.
- Buyer demand favors Anthropic by roughly five buyers for every two seeking OpenAI shares, per Rainmaker Securities.
- OpenAI previewed GPT-5.6 Sol in June and expanded availability this month with GPT-5.6 Terra and GPT-5.6 Luna.
- GPT-5.6 Sol is ranked among the industry's top models, though Anthropic's Mythos and Fable models lead in some evaluations.
- Codex and ChatGPT Work have reached 9 million active users, according to OpenAI.
- Concerns over slowing growth, executive departures, and competition from Anthropic and Elon Musk's lawsuit weighed on OpenAI's momentum earlier in 2026.
Context
The AI industry continues to see significant investment and valuation shifts, with private secondary markets playing a crucial role in determining the worth of non-public companies. OpenAI and Anthropic are at the forefront of this landscape, with their valuations and investor interest serving as key indicators of market trends. The competition between these two companies, along with the rise of open-source models and Chinese AI startups, highlights the dynamic and rapidly evolving nature of the AI sector.
For developers and startups, the resurgence of OpenAI and the continued dominance of Anthropic present both opportunities and challenges. Collaboration with these leading AI companies can drive innovation and growth, but the competitive pressure also necessitates a focus on differentiation and strategic positioning. Investors, meanwhile, must navigate the risks and rewards of backing these high-valuation AI companies, considering factors such as market competition, product innovation, and long-term growth prospects.
