WHERE THINGS STAND, 14 OCTOBER 2026
● Anthropic is going first. Pre-IPO investor day today, a reported $1.8–2 trillion target, and trading aimed before Thanksgiving.
● OpenAI pushed to 2027. Altman ruled out a 2026 debut citing AI safety. A reported $30bn-plus private round at about $1.4 trillion bridges the gap.
● The valuations have crossed over. Anthropic's target is above OpenAI's latest private mark, having been the smaller company for most of its existence.
● Neither is a price. Both numbers are pre-marketing anchors reported by Bloomberg, not anything either company has committed to.
A year ago the question was which of the two frontier labs would list first and whether either could clear a trillion dollars. As of today one is pitching institutional investors in San Francisco and the other has stepped back from the window entirely.
Side by side
| | Anthropic | OpenAI |
|---|
| Status | Pre-IPO investor day 14 Oct 2026 | IPO deferred to 2027 |
| Valuation figure | $1.8–2 trillion target | ~$1.4 trillion (private round) |
| Next milestone | Marketing from week of 9 Nov | Close the reported $30bn+ round |
| Trading target | Before 26 November 2026 | 2027, no date given |
| Stated reason for timing | Not stated | Altman cited AI safety |
| Latest revenue figure | Not reliably reported | $40bn run-rate in August, +70% since July |
| Last private round | Not reported | $122bn in March at $852bn |
| Source | Bloomberg | Bloomberg, 29 Sep 2026 |
What changed, and when
OpenAI expected to go public in 2026. Sam Altman has since ruled that out, citing AI safety. Bloomberg reported on 29 September that the company is in talks to raise at least $30 billion at around a $1.4 trillion valuation, described as a bridge to a 2027 listing. In March it raised $122 billion at an $852 billion valuation, so the private mark has risen roughly 64% in six months.
Anthropic moved the other way. Today's investor day is the formal start of a process that could see marketing begin the week of 9 November and trading before Thanksgiving. Roughly six weeks from first pitch to debut.
The crossover is the story
Anthropic has been the smaller of the two for essentially its whole existence. A reported $1.8–2 trillion target sits above OpenAI's $1.4 trillion private mark — not a like-for-like comparison, since one is a public target and the other a private round, but the direction is the point.
Two readings, and the honest answer is that nobody outside either company knows which is right. Either Anthropic's enterprise and coding revenue is compounding faster than OpenAI's consumer base, or a pre-marketing anchor is being set high on purpose and will come down when institutions respond. Investor days exist precisely to find that out.
THE BACKDROP BOTH ARE LISTING INTO
Excluding SpaceX and SK Hynix, US IPOs this year carry a weighted average return of about -4%, against roughly +12% for the S&P 500 and +20% for the Nasdaq 100. Buying the index beat buying new issues. That is the market Anthropic is pricing into in November, and the one OpenAI has chosen to wait out.
Which one is the better outcome for you
If you build on these APIs: a listing means quarterly disclosure. For the first time you would be able to see a frontier lab's actual gross margin on inference, its customer concentration and its compute commitments. That is more useful to anyone making a multi-year platform bet than any benchmark.
If you are watching for price changes: public companies face different pressure on loss-making product lines than private ones. Whether that means cheaper tiers to win share or fewer free tiers to show margin is genuinely open, and it is the thing to watch in the first two earnings calls.
If you are considering buying either: we are not in a position to advise on that, and neither is anyone working from pre-marketing reports. Wait for the S-1. It will carry audited numbers, and every figure on this page is a report about a plan.
What would change this page
Anthropic's marketing not starting the week of 9 November — the first checkable commitment in the schedule, and the clearest early sign the Thanksgiving target has gone. The S-1 landing, which replaces every reported figure here with an audited one. Or OpenAI closing its round and naming a 2027 date, which would turn a deferral into a plan.
We update this comparison when any of those happen rather than writing a new page each time.
Sources
TechCrunch — OpenAI in talks to raise $30bn at $1.4T ·
Report on Anthropic's investor day and target