AI news May 2026: GPT-5.5, SpaceX, Codex, the OpenAI phone
Alexandre
··
Reading time: 14 min
OpenAI dominated the news cycle this week in a way that even fans found excessive. Five major announcements in four days, across completely different verticals: models, compute infrastructure, browser, hardware, lawsuit. It's the kind of week where you realize the company is no longer trying to win developers one product at a time, but to make escape impossible on every surface.
Five stories worth pausing on: GPT-5.5 Instant becomes the ChatGPT default with -52.5% hallucinations, Anthropic signs with SpaceX for 220,000 GPU to lift rate limits, OpenAI launches Codex as a Chrome plugin with DevTools access, the OpenAI smartphone is fast-tracked for autumn 2027 with a proprietary OS, and Greg Brockman reveals under oath a $30 billion fortune built without any direct investment. The previous week had already been packed, between Copilot, Mythos, and the agent that deleted everything — this week drives the point home.
I'm building Waku with Claude Code and, concretely, three of these announcements directly touch my dev sessions: Claude rate limits, the Realtime APIs, and Codex's DevTools access. The rest is macro strategy that will take two years to land.
The week's radar
Event
Date
Player
Key figure
Source
GPT-5.5 Instant new ChatGPT default
May 5
OpenAI
-52.5% hallucinations
TechCrunch
Anthropic signs with SpaceXAI (Colossus 1)
May 6
Anthropic
220,000+ GPU, 300 MW
Forbes
Codex Chrome plugin + GPT Realtime API
May 7
OpenAI
70 languages, DevTools access
Engadget
OpenAI smartphone fast-tracked
May 5
OpenAI (Kuo)
30M units 2027-28
The Verge
Greg Brockman: $30B at trial
May 4
Musk v. OpenAI
0 invested, 2.5-3% equity
Washington Post
GPT-5.5 Instant: -52.5% hallucinations and transparent memory for ChatGPT
On May 5, 2026, OpenAI replaced GPT-5.3 Instant with GPT-5.5 Instant as the default model for ChatGPT and the API's chat-latest endpoint. Hallucination reduction on sensitive domains reaches 52.5%, with 81.2 on AIME 2025 and 76.0 on MMMU-Pro. The structural novelty: "memory sources" now show exactly which files and emails the model used to personalize a response.
According to TechCrunch, the update is automatic for all ChatGPT web users. The API's chat-latest endpoint also switches to GPT-5.5 Instant without any action required. Developers who had pinned GPT-5.3 Instant keep their version — it remains available on paid plans for three more months.
The precise figures: 52.5% reduction in hallucinations on sensitive prompts (law, medicine, finance), 37.3% drop in inaccuracies on difficult conversations. On standard benchmarks: 81.2 on AIME 2025 (mathematics), 76.0 on MMMU-Pro (multimodal reasoning). For comparison, GPT-5.3 Instant scored 74.1 on AIME and 71.6 on MMMU-Pro according to Papers With Code data.
Memory sources: a ChatGPT feature that makes visible which documents, connected Gmail emails, or past conversations the model used to contextualize a response. Each source is individually deletable from the interface.
The "memory sources" feature deserves a separate paragraph because it changes something fundamental in the user-model relationship. Until now, personalization was a black box: ChatGPT "knew you" but you didn't know from what. Now you see exactly the sources — a specific email, a shared file, an exchange from last month — and you can delete them one by one. Available on Plus and Pro plans on web first, Free and Enterprise in the coming weeks.
On May 7, three Realtime models were added to the API (TechCrunch): GPT-Realtime-2 (voice + GPT-5 reasoning, billed per token), GPT-Realtime-Translate (70 source languages, billed per minute), and GPT-Realtime-Whisper (live speech-to-text, also per minute). These APIs open real-time multilingual transcription at costs below previous offerings, without going through intermediate pipelines.
Model
Capability
Billing mode
GPT-Realtime-2
Voice + GPT-5 reasoning
Per token
GPT-Realtime-Translate
70 source languages
Per minute
GPT-Realtime-Whisper
Live speech-to-text
Per minute
Source: TechCrunch, May 7, 2026
My solo dev take
Memory transparency is what I've wanted in all my tools for two years. Seeing the sources used to personalize a response is the minimum viable requirement to trust a system that "remembers you." Gmail connection, no — that's a free attack surface for marginal gain on use cases that actually matter. GPT-Realtime-Translate billed per minute, though, changes something real for apps targeting a non-English market without a dedicated NLP budget.
Anthropic signs with SpaceX: 220,000 GPU to lift Claude rate limits
On May 6, 2026, Anthropic announced an exclusive agreement with SpaceXAI to access Colossus 1, the Memphis Tennessee supercomputer. 220,000 Nvidia GPU (H100, H200, GB200), 300 megawatts of power. Dario Amodei's stated goal: lift rate limits on Claude Pro, Claude Max, and Claude Code in the coming months.
Forbes and NBC News both confirmed the technical details. Colossus 1 was initially built for xAI but excess capacity has been leased to third parties since early 2026. Anthropic gets priority access — not exclusive across the entire fleet — but the reserved bandwidth is sufficient to absorb significant demand spikes on Claude models.
Colossus 1: a 220,000 Nvidia GPU supercomputer located in Memphis, Tennessee, operated by SpaceXAI. Initially built for xAI's training needs, it represents one of the three largest GPU concentrations in the world alongside Google DeepMind and Microsoft Azure AI clusters.
At the May 6 developer conference, Dario Amodei dropped the line that was still circulating on X two days later: "This is the first year that we have grown faster than the exponential." Translation: demand for Claude has grown faster than their ability to provision it, hence the limitations frustrating Claude Code users for weeks. The SpaceXAI deal is presented as the direct answer to this bottleneck.
The agreement also includes, according to SpaceNews, an option for low-orbit data centers via SpaceX satellites. No precise timeline was given on this component, which looks like an optional clause rather than an operational commitment. Latency rates for an orbital cluster running LLM inference are undocumented — for good reason.
On social media, the announcement triggered a fairly predictable debate on r/MachineLearning: Anthropic, which positions itself on safety and AI alignment, signing with Elon Musk's infrastructure while Musk sues OpenAI for breach of nonprofit mission. Both positions exist simultaneously, and compute clearly won over brand consistency.
I had detailed the offensive capabilities of Mythos, Anthropic's cybersecurity model, two weeks ago. This compute deal changes the equation: if Claude Code rate limits are lifted, Anthropic regains the field advantage over solo devs who had switched to Cursor + GPT-5 out of frustration.
My solo dev take
Anthropic signs with Elon Musk's infrastructure while Musk sues OpenAI for mission betrayal. The realpolitik of compute is stronger than any ethical positioning — and that's useful information for calibrating what "safety-first" discourse is worth. On the practical side: if Claude Code rate limits lift in the coming months, I'll feel it directly in my dev sessions. That's the only thing that matters for my current workflows.
Codex on Chrome: DevTools, multi-tab context, announced merger with ChatGPT
On May 7, 2026, OpenAI launched Codex as a Chrome plugin giving access to the browser's DevTools, the context of open tabs, and the ability to test web apps directly in the browser. OpenAI simultaneously announced the upcoming merger of Codex, ChatGPT, and its Atlas browser into a single product.
Engadget covered the launch in detail: the plugin installs on Chrome stable, accesses DevTools (console, network, elements), captures the context of active tabs to contextualize requests, and can run basic tests on web apps open in the browser. The DevTools integration changes something: until now, getting browser context into an LLM workflow meant manually copying and pasting stack traces or network logs.
Codex Chrome: OpenAI's Chrome plugin that connects an LLM assistant directly to the browser's DevTools (console, network, elements), open tab context, and apps under test. First native access for a mainstream LLM to front-end debug tools without manual copy-paste.
The announced Codex + ChatGPT + Atlas merger is presented as a progressive convergence, with no precise date. Atlas is OpenAI's AI browser announced in March, not yet in wide public beta. The idea: a single environment where the model sees what you see in the browser, can interact with pages, and has full development context. It's the Claude Computer Use schema, but natively integrated into Chrome rather than through a VM.
On agent architecture in general, I analyzed orchestration patterns a few weeks ago — the Codex/Atlas merger corresponds exactly to the "agent with large observation window" pattern emerging as the standard.
The 70 languages of GPT-Realtime-Translate (announced the same day) complete the picture: OpenAI is building a complete stack where the model understands the browser, the code, and voice simultaneously. The question this raises for tools like Cursor or Cline is how long they can stay relevant against a native editor + browser + voice offering.
Component
Status
Access
Codex Chrome
Available, Chrome stable
Chrome Web Store extension
ChatGPT
Available
Web, iOS, Android
Atlas (browser)
Limited beta
Waitlist
Merger of all three
Announced, no date
—
My solo dev take
I'm testing Codex Chrome this weekend on Waku. Direct DevTools access from the plugin, without copy-pasting stack traces into a separate window, is the friction point I've hit most often in front-end debug sessions. If it works cleanly on Next.js apps, that's a real workflow change. The Atlas merger though: three separate products that "will merge someday" on a roadmap without a date — I'll wait and see.
OpenAI smartphone in autumn 2027: proprietary OS, dual-NPU, 30 million units
According to analyst Ming-Chi Kuo in a May 5, 2026 report picked up by The Verge, OpenAI has fast-tracked production of its smartphone for an autumn 2027 launch. The device runs a proprietary OS, packs a custom MediaTek Dimensity 9600 chipset with dual-NPU for local inference, and 30 million units are targeted for 2027-2028.
The Verge published Kuo's report details: mass production scheduled for H1 2027, commercial launch autumn 2027. The MediaTek Dimensity 9600 chipset was custom-built specifically for OpenAI with a dual-NPU designed to run inference models locally without hitting the cloud for common tasks. The OS is described as "proprietary" — which could cover a hard Android fork or a completely independent system; details haven't been confirmed.
Dual-NPU: a configuration of two Neural Processing Units in a single chipset, enabling two inference models to run in parallel or dedicating one NPU to continuous voice processing while the other handles assistant tasks. Preferred for AI devices wanting low latency without a network connection.
30 million units over two years (2027-2028) was the figure that circulated most on X in the 48 hours after publication. For comparison: Samsung Galaxy S25 sold roughly 12 million units in Q1 2026 according to Counterpoint Research. Hitting 30 million in two years without an established retail network, without a mature third-party app ecosystem, and while converting users to a new OS is an ambition hardware analysts called "IPO narrative" on r/technology.
The real question nobody is asking yet: who's the distributor? Apple has the App Store, Google has the Play Store and thousands of partner resellers. OpenAI has neither. An Amazon or Best Buy deal would solve physical distribution in the US, but Europe, Asia, and Japan are markets where local retail presence is non-negotiable for a hardware launch.
My solo dev take
30 million units in two years with no app ecosystem and no retail network — that's IPO narrative before it's a product strategy. I'm not saying the smartphone won't happen — Kuo has a solid track record on Apple, less so on everything else. I'm saying the announced numbers assume an adoption curve that even players with 20 years of distribution infrastructure haven't hit that fast. What interests me more: the dual-NPU for local inference. If it runs cleanly at 30ms latency, that changes what you can do in a mobile app without cloud.
Greg Brockman: $30 billion fortune revealed under oath, zero invested
On May 4, 2026, Greg Brockman, OpenAI co-founder, testified at the Musk v. OpenAI trial in Oakland court. Under oath, he revealed holding between 2.5 and 3% of OpenAI, obtained through compensation during the nonprofit-to-forprofit transition, for an estimated value of roughly $30 billion at the current $852 billion valuation — without having invested a single cent directly.
Washington Post and Reuters both covered the testimony in detail. This is the first time these figures have come out in a legal context, with a truth obligation. Brockman specified that his equity was built progressively through share-equivalent compensation packages during the restructuring that transformed OpenAI from a nonprofit into a commercial entity — a hybrid structure still at the heart of the Musk lawsuit.
On May 7, a former OpenAI board member testified via pre-recorded video that Altman "was feeding a toxic culture of deception" within the organization. According to Bloomberg, this testimony aims to establish that Altman's dismissal in November 2023 was not arbitrary but motivated by documented behavior. The trial resumes next week with Sam Altman himself on the stand.
OpenAI's nonprofit-to-forprofit transition: a restructuring underway since 2023 that converts OpenAI from a nonprofit supervised by a board into a standard commercial company (Public Benefit Corporation). The legality of this conversion — and specifically how assets were valued during the transfer — is at the core of the lawsuit initiated by Elon Musk.
Trial timeline:
Date
Event
May 4, 2026
Brockman testimony: $30B revealed, 0 direct investment
May 7, 2026
Former board video testimony: "toxic culture of deception" (Altman)
Week of May 11
Sam Altman on the stand
Source: Bloomberg, Washington Post, Reuters
On X, the $30 billion-without-direct-investment figure was the most shared story of the week in tech circles. Many people who had followed the Altman departure-return in November 2023 without understanding the financial stakes got their answer.
My solo dev take
$30 billion built on the transformation of a charitable association into a commercial company. That doesn't change the quality of GPT-5.5 Instant or Claude Code's rate limits — the tools remain what they are. It changes what "developing AI for the benefit of humanity" means when you read the fine print of the prospectus. The trial giving public access to these figures is probably more useful for understanding the industry than most AI conferences this year.
First serious move toward pre-release regulation in the US
What the week of May 8 changes for independent developers
GPT-5.5 Instant is already in prod, you don't need to do anything
If you use chat-latest or the standard ChatGPT web session, you've been on GPT-5.5 Instant since May 5. The hallucination reduction on sensitive domains is real on benchmarks — what it delivers on real-context code prompts, a few days of testing will settle.
Claude rate limits could lift in the coming months
The SpaceXAI deal is presented as a direct response to the compute bottleneck capping Claude Pro, Max, and Claude Code users. If the stated goal materializes, long dev sessions that get cut by context limits will become less frequent. It's not done yet — but it's the first time Anthropic has publicly announced securing the infrastructure needed to absorb demand.
Codex Chrome changes front-end debugging, but Atlas remains vague
DevTools access from a Chrome plugin is reduced friction on front-end debug workflows. The Codex + ChatGPT + Atlas merger announced in parallel is product messaging without a date — useful for signaling a direction, not for planning a workflow.
The OpenAI smartphone is 18 months away, not relevant for solo devs right now
No SDK, no developer docs, no ecosystem. The 30 million unit target for 2027-2028 is a hardware bet that will take time to confirm or collapse. Watch late 2026: how OpenAI handles distribution and whether a developer program takes shape.
The Musk v. OpenAI trial will surface useful figures for several more weeks
Every testimony brings information on OpenAI's valuation, equity structures, and internal decisions that the company's communications would never have published voluntarily. Altman on the stand next week.
FAQ
Does GPT-5.5 Instant replace GPT-5.3 Instant for all API users?
The chat-latest endpoint automatically switches to GPT-5.5 Instant from May 5, 2026. Developers who have explicitly pinned gpt-5.3-instant in their requests keep the old model for three more months. OpenAI recommends progressive migration for production apps, especially for sensitive domains where hallucination reduction is most pronounced (law, medicine, finance).
What does the Anthropic-SpaceX deal concretely change for Claude Code users?
The stated objective is to lift rate limits on Claude Pro, Max, and Claude Code. Anthropic has not published a precise timeline. In practice, developers who regularly hit context limits on long sessions should see those limits pushed back in the coming months — if the Colossus 1 compute onboarding goes smoothly. No guarantees were given on timing.
Does the Codex Chrome plugin work on browsers other than Chrome?
At the May 7 launch, the plugin is available exclusively on Chrome stable via the Chrome Web Store. No Firefox, Edge, or Safari extension has been announced. The upcoming merger with Atlas (OpenAI's proprietary browser) suggests that deep DevTools integration will be developed primarily for Chrome and Atlas rather than third-party browsers.
Will the OpenAI smartphone be compatible with existing Android apps?
Available information has not confirmed compatibility with the Android ecosystem. The OS is described as "proprietary," leaving two possibilities: a hard Android fork with partial Play Store access, or an independent system starting from scratch. The second option would mean convincing developers to port their apps, making the 30 million unit target even harder to achieve without major partnerships.
Does Greg Brockman still have an active role at OpenAI?
Brockman took a sabbatical from OpenAI in September 2024 following the board events of November 2023. His operational role is suspended but his equity remains intact. The trial revelations (2.5-3% of the company, zero direct investment) concern his financial situation, not an announced return to the company.
A dense week, with surface-level coherence from OpenAI (model, voice, browser, hardware, legal) and an Anthropic that solves its infrastructure problem with the industry's least predictable partner. The competition between the two now plays out on available compute as much as on model quality.
Two dates to put in the calendar: Google I/O on May 20 (Google's likely response on AI dev tools), and Sam Altman's testimony at trial next week. The second is probably more instructive about the real state of the industry than the first.
Alex
Key takeaways
GPT-5.5 Instant: -52.5% hallucinations, transparent memory sources, new ChatGPT and API chat-latest default since May 5
Anthropic signs with SpaceXAI: Colossus 1 Memphis, 220,000+ GPU, 300 MW — goal to lift Claude rate limits
Codex Chrome plugin: DevTools access + tab context + web app testing in the browser, launched May 7
GPT Realtime API: GPT-Realtime-2, Translate (70 languages) and Whisper (live speech-to-text), billed per token or per minute
