Claude-of-Duty
A Call of Duty-quality FPS in Three.js, built from a single prompt.
Live drop
AnthropicDropped Jul 24, 202614 builds10 makers5 prompts
Proactive long-horizon agents with stronger self-verification and error recovery.


About this release
Claude Opus 5 is Anthropic's latest Opus-tier LLM, released July 24, 2026. It upgrades the prior Opus 4.8 generation with gains in agentic coding, computer use, long-horizon knowledge work, and mathematical/scientific reasoning. The model supports 1M token context, 128k max output, thinking enabled by default, and mid-conversation tool changes. It is positioned as near Fable 5 intelligence at the same pricing as Opus 4.8 and serves as the new default on Claude Max.
Read the official Anthropic launch pageWorth opening first
Same brief, other models
All challenges →Challenge
Same brief across models — older takes on the left, newer on the right.
Paste the URL and Dropday.ai will credit you, track the build as it evolves, and put it on this drop.
Submit a build