Anthropic Posts $80.7 Billion First-Half Loss Ahead of November IPO

Anthropic recorded a net loss of $80.7 billion in the first six months of 2026, according to a draft IPO prospectus reviewed by Reuters — more than six times the $13 billion loss the AI startup posted in the same period a year earlier.

The headline number deserves an asterisk. A $72 billion accounting charge drove most of it, reflecting an increase in the estimated value of bonds that could eventually convert into Anthropic shares. That is a paper valuation effect, not cash leaving the company's accounts.

What does the loss actually consist of?

The gap between the accounting figure and the underlying business is wide. Strip out the convertible-note charge, and the picture sharpens considerably:

• The $72 billion charge stems from convertible bonds whose estimated fair value rose as Anthropic's valuation climbed.
• Actual spending on computing capacity and infrastructure reached nearly $9 billion in the first half of 2026, up from $2.3 billion a year earlier — roughly a fourfold increase in twelve months.
• Anthropic has committed to spending at least $518 billion over a decade on cloud services, computing and infrastructure. Spread evenly, that works out to more than $50 billion every year for ten years.

Anthropic did not respond to a Reuters request for comment on the figures.

The scale of the commitment is the story here. Investors are increasingly scrutinizing whether the vast sums flowing into chips and data centers will generate sufficient returns, and Anthropic's S-1 puts a hard number on what the AI race costs to run.

What did investors hear on October 14?

At an investor meeting on October 14, Anthropic told prospective IPO investors that third-quarter revenue jumped 45 percent from the previous quarter to $16.8 billion, Reuters reported, citing people familiar with the matter.

The growth is real, but its trajectory is bending. Revenue had more than doubled from the first quarter to reach $11.6 billion in the second quarter. A 45 percent sequential rise in the third quarter, while substantial, marks a clear deceleration from that pace — and some investors were disappointed by the slowdown.

The figures eased some concerns about the enormous costs of developing AI systems, according to Reuters' sources. The caveat: those same sources flagged the slowing sequential growth rate as a fresh worry.

How does 2026 compare with 2025?

The pattern is repeating. Reuters reported in September that Anthropic posted a $42 billion net loss for the full year 2025, most of it from a similar accounting charge. As Anthropic's valuation climbed, the estimated fair value of those notes tripled year over year.

The 2025 operating numbers show the underlying economics more plainly. Excluding the charge, Anthropic posted an operating loss of about $8.1 billion on $4.6 billion of revenue for the year. In other words, the company burned roughly $1.76 in operating costs for every dollar of revenue it brought in.

One bright spot persists. The company has benefited from the popularity of Claude Code, its coding assistant that developers use to write software and build apps.

Why does the IPO valuation matter beyond Anthropic?

Anthropic is expected to go public in November, and some investors are now considering a lower valuation of around $1.5 trillion following the latest financial disclosures, Reuters reported last week. That repricing follows directly from the prospectus numbers.

The stakes extend past one company. A cooler reception for Anthropic's IPO could weigh on the wider AI market, whose near-term prospects investors see as hinging largely on the share sale's success. Rival OpenAI is weighing a potential listing next year, and a soft Anthropic debut would set an uncomfortable reference point for it.

The takeaway in plain words: the loss is mostly paper, but the spending commitments and slowing growth are not — and November's listing will test whether the market still prices the AI story at $1.5 trillion.