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Polymarket And Kalshi Rivalry Forging New Paths In Prediction Markets

High-Stakes Competition In A Booming Market

The prediction market sector is seeing growing competition between Polymarket and Kalshi, two startups that are expanding their positions while also converging around a shared investment initiative. Both companies are linked to 5(c) Capital, a new fund focused on opportunities within the prediction market space. Despite their rivalry, the involvement of both sides in the same fund highlights a broader alignment around the sector’s long-term potential.

Innovative Funding Initiative

5(c) Capital, named after the regulatory clause governing prediction markets, is raising $35 million for its first fund. The initiative is backed by key figures in the sector, including Kalshi CEO Tarek Mansour and Polymarket CEO Shayne Coplan, alongside established investors.

The fund plans to invest in around 20 companies, with a focus on infrastructure such as market makers and index development. These areas are seen as critical for supporting the growth and functionality of prediction markets.

A Strategic Investment By Industry Leaders

Kalshi has confirmed that its CEO is backing the fund, signalling confidence in the sector’s development. While Polymarket has not publicly detailed its position, its leadership’s involvement points to a similar outlook. The fund is led by Adhi Rajaprabhakaran, a former Kalshi trader, and Noah Zingler-Sternig, previously head of operations at Kalshi, bringing sector-specific experience into the investment strategy.

Expanding Market Valuations

At the same time, valuations across the sector are increasing. Kalshi is in the process of raising $1 billion at a valuation of $22 billion, roughly double its level from four months earlier. Polymarket is also in discussions for a new funding round, with a reported valuation target of around $20 billion. These figures reflect growing investor interest in prediction markets and their potential role within financial technology.

Looking Ahead

The combination of rising valuations, new capital and increased competition suggests continued expansion in the sector. The launch of 5(c) Capital adds further support to infrastructure development, which could play a key role in shaping how prediction markets evolve. At the same time, the involvement of competing players in shared initiatives highlights how the market is still forming, with collaboration and competition developing in parallel.

OpenAI Brings Unlimited Text Chats To Free ChatGPT Users

Unlimited Text Conversations Roll Out

OpenAI is removing limits on text-based conversations for all ChatGPT users, following the platform’s recent milestone of surpassing one billion weekly users.

The update introduces GPT-5.6 Luna as the default model for Free and Go users, replacing GPT-5.5.

New “Think” Button For More Complex Questions

Alongside unlimited text chats, Free and Go users will gain access to a new “Think” button, allowing them to use additional reasoning power for more complex queries.

OpenAI noted that separate usage limits will continue to apply to file uploads, image generation, voice features and other multimodal tools.

Faster Responses For Paid Subscribers

The update also brings improvements for ChatGPT Plus and Pro subscribers. They will receive access to GPT-5.6 Sol, an upgraded model designed for everyday tasks such as web research, planning, writing, decision-making and answering questions. According to OpenAI, the model delivers shorter, more robust responses.

The company noted that this version is separate from the GPT-5.6 Sol model used in Codex and Work, which remains unchanged. Plus and Pro subscribers will also receive a new thinking slider, allowing them to adjust how much reasoning the model applies before generating an answer, depending on the complexity of the task.

OpenAI Reports Fewer Errors

According to OpenAI’s internal testing, GPT-5.6 Luna produces 62% fewer factual errors than GPT-5.5 Instant, while GPT-5.6 Sol reduces factual errors by 68%.

The updated GPT-5.6 Sol model is available to Plus and Pro users starting today. The remaining features for Free and Go users will roll out throughout the week, with unlimited text chats and the new Think button becoming available next week.

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