OpenAI on Monday began emailing the more than 8,000 developers who applied for its invite-only GPT-5.5 party giving them a surprise consolation prize: a tenfold increase in the codec rate limit on their individual ChatGPT accounts, effective immediately and lasting through June 5.
"Over 8,000 people expressed interest in just 24 hours, and while we wanted our office to be large enough to welcome everyone, we weren’t able to make room for everyone who applied," the company wrote in the email, which was obtained by VentureBeat. "As a small token of appreciation, we have 10xed your codec rate limit on your personal ChatGPT account until June 5th."
This gift is not limited to those lucky enough to receive a party invitation. According to the email and confirmed by multiple recipients on social media, everyone who raised their hand — whether they were accepted, waitlisted, or rejected — received an increase in the rate limit.
CEO Sam Altman telegraphed the move on X shortly before the inbox lights began. "We are going to do something nice for everyone who applied for the GPT-5.5 party and for whom we did not have space," He has written. "hope you enjoy!" The post received more than 521,000 views within a few hours.
What a Month of Supercharged Codex Access Really Means to Developers
The practical implications are huge. Codex, OpenAI’s AI-powered coding agent, operates under a daily usage limit that varies by subscription level. The tenfold increase in those limits gives developers dramatically more room to prototype, debug, and ship code using GPT-5.5 – which OpenAI says matches the per-token latency of GPT-5.4 while performing at a higher level of intelligence and using significantly fewer tokens to complete tasks.
31 days is enough time to reshape habits. By providing expanded access to thousands of developers during a critical adoption period, OpenAI is effectively subsidizing the deep, sustained use that turns a curious test into a daily dependency. It’s a bet that once developers experience the codec in full force, they won’t want to go back – and when the limits reset on June 5, a meaningful number will be upgrading their subscriptions to preserve the workflows they’ve created.
The developer community reacted with a mixture of delight and regret. "I’m literally not taking off my Codex hat for this month," A developer announced on Others berated themselves for not signing up. "This is the last time I didn’t sign up just because I’m not in SF," One wrote.
Several users have raised a question that OpenAI has yet to answer publicly: Does the boost match the 20x multiplier of the existing Pro $200 tier? One user reported that OpenAI support said no – users get whichever limit is higher, not the combined total. "The key question is not whether the 10-fold increase is only for party applicants," He has written. "Whether it stacks with the Pro or not."
OpenAI did not immediately respond to a request for comment on whether Boost conforms to Pro-tier limitations.
Inside the low-key meeting an AI had planned for itself
Rate Limit Gift is an adjunct to the main program: "GPT-5.5 at 5/5," The invite-only gathering is taking place tonight from 5:55PM to 8:55PM PDT at an undisclosed San Francisco location. OpenAI sent the bill in the evening "A brief meeting with Sam and the team behind GPT-5.5," The promise of food, drink, community, gifts and swag – not a product announcement. Even the address remained secret until the invitation was confirmed – a touch of exclusivity that created its own buzz.
In a description that doubled as a product demo, Altman revealed that GPT-5.5 was the one who planned the party. The model proposed a date of May 5, suggested that human developers instead of AI give a toast, and recommended setting up a suggestion box for the next generation models. Altman described it as "Strange random behavior." Registrations closed soon after opening due to overwhelming demand, with Codex taking over the selection process.
Altman also extended an unexpected invitation. He publicly asked Elon Musk to get involved and said, "He can come if he wants… The world needs more love. The gesture comes amid Musk’s ongoing lawsuit against OpenAI, which seeks up to $150 billion in damages — a fact that makes the invitation read less like diplomacy and more like performance art.
Anthropic’s competitive reception turns scheduling overlap into Silicon Valley spectacle
This is where the story gets interesting. VentureBeat has confirmed that Anthropic is holding its own invite-only event in San Francisco on Tuesday evening — a "Media VIP Reception" At about the same time as OpenAI’s party. The reception served as a warm-up for the Anthropic Code with Cloud Developer Conference, the company’s second annual gathering focused on its APIs, CLI tools, and Model Context Protocol (MCP). The conference proper will take place tomorrow.
The scheduling overlap is difficult to dismiss as a coincidence. Both companies are organizing developer-focused events on the same evening, in the same city, targeting the same people. Whether this was intentional counter-programming or a genuine coincidence, Optics neatly captures where things stand in the industry’s most consequential rivalry.
At Anthropic’s conference its executive and product teams will discuss cloud code, agent implementation strategies, and product roadmaps – all aimed at exactly the same developer audience that received a one-month free Codex upgrade from OpenAI.
How Anthropic overtook OpenAI in revenue – and what it means for the coding wars
The dueling cocktail hour is a social manifestation of a far more consequential battle taking place over revenue, developer adoption, and investor confidence – which is tilted sharply in Anthropic’s favor.
According to Counterpoint Research data, Anthropic overtook OpenAI for the first time in global LLM revenue market share in Q1 2026, capturing 31.4% compared to OpenAI’s 29%. But the title almost being a tie obscures a dramatic structural deviation. Counterpoint estimates that Anthropic has captured that share with approximately 134 million monthly active users compared to approximately 900 million for OpenAI – the average monthly revenue per active user for Anthropic is $16.20 versus $2.20 for OpenAI. OpenAI places large-scale orders; Anthropic extracts almost seven times more revenue per user. That difference is the central tension in this rivalry.
Enterprise Shift has been in the making for over a year. Menlo Ventures – whose portfolio includes Anthropic – estimates the company now captures 40% of enterprise LLM spend, up from 24% last year and 12% in 2023, while OpenAI’s share fell from 50% to 27% over the same period. Anthropic has maintained a unique position in the LLM leaderboard for coding for almost 18 months, starting with Cloud Sonnet 3.5 in June 2024. That dominance in code – AI’s first true killer app – has become the on-ramp to broader enterprise adoption and the engine behind Anthropic’s revenue acceleration.
The top-line numbers tell the rest of the story. Anthropic said earlier this month that its annual revenue has topped $30 billion, up from $9 billion at the end of 2025, with more than 1,000 business customers now spending more than $1 million annually — a figure the company says has more than doubled since February.
Sources familiar with Anthropic’s financials told TechCrunch that the run rate is currently close to $40 billion, driven primarily by demand for cloud code and cowork. Meanwhile, according to Reuters, OpenAI topped $25 billion in annual revenue as of February — but The Wall Street Journal reported that the company recently missed its own projections for user growth and revenue, with CFO Sarah Fryer warning colleagues that if growth doesn’t accelerate, the company could face difficulty funding future compute deals.
The pace of fundraising has increased at a pace that could reshape the power map of the industry. Anthropic raised $30 billion in February at a $380 billion valuation. Bloomberg reported last week that the company has begun considering a new funding round that would value it at more than $900 billion, potentially overtaking OpenAI as the world’s most valuable AI startup. OpenAI was valued at $852 billion at the end of March after closing a record-breaking $122 billion funding round. If Anthropic moves forward on the terms described, the company would not only double its valuation but also overtake OpenAI – a reversal that seemed unimaginable six months ago.
Two parties, two approaches, and one city at the center of the AI industry’s defining rivalry
For the more than 8,000 developers who have applied to the GPT-5.5 party, the immediate value is straightforward: a full month of dramatically expanded codec usage, free of charge, during a period when both companies are shipping at a breakneck pace. For the industry, the signal is hard to miss. Two of the world’s most valuable private companies are competing for developer loyalty with a combination of freebies, invite-only parties, celebrity CEO involvement, and multi-billion-dollar venture ventures — all within the same 24-hour window, in the same seven-square-mile city.
The broader stakes extend far beyond cocktail napkins and rate limits. Both companies are moving towards a possible IPO. Both enterprises are courting the same Wall Street backers for the joint venture. Both are racing to define how the next generation of software is built – and by whom. Caught between them are developers who, for the moment, are the beneficiaries of a spending war that shows no signs of cooling down.
Tonight’s Anthropic reception in San Francisco begins at 5 p.m. The OpenAI party starts at 5:55 pm. VentureBeat will be on both. And in between the two spaces, the 8,000 developers who couldn’t get into either room will be battling their new rate limits — building the future with whichever model they open first.
Michael Nunez is an editor covering artificial intelligence at VentureBeat. He’s attending the Anthropic Code and OpenAI GPT-5.5 launch party tonight in San Francisco with the Cloud Media VIP Welcome Reception.
This story is developing and will be updated.
<a href