What we know

Maurice Heumann reportedly used AI agents, specifically Claude and Codex, processing over 500 billion tokens to reconstruct the source code of Call of Duty: Modern Warfare 2, achieving an 83% byte-for-byte match with the original functions. However, this claim is currently supported by only a single secondary source and lacks independent verification. Maurice Heumann used AI agents Claude and Codex to rebuild Call of Duty: Modern Warfare 2's source code. The AI agents processed more than 500 billion tokens during the reconstruction. 83% of the reconstructed functions match the original source code byte for byte.

Why it matters

Reconstructing proprietary game source code is a complex technical feat, especially for a high-profile title like Call of Duty: Modern Warfare 2. AI agents such as Claude (Anthropic) and Codex (OpenAI) are capable of code generation and analysis, but the scale—over 500 billion tokens—and the accuracy claimed are unprecedented.

What is still unknown

Independent tests of accuracy, supported languages, and a broader release date are not in the reporting.