Poolside competitors

Builds frontier large language models including GPT and Codex that power the majority of AI coding tools via API, plus first-party products like ChatGPT and Codex CLI.

Foundation Models · Growth $110B

Foundation Models

Growth

$110B

HQ

Creates Claude — the frontier LLM family that powers Claude Code, the terminal-based coding agent that became the breakout developer tool of 2025.

Foundation Models · Series G $30B

Foundation Models

Series G

$30B

HQ