AISystem

Claude Opus 4.7

Anthropic's Opus-tier frontier model, which held the NanoGPT speedrun optimizer-track record at 2,930 steps after Prime Intellect's autonomous research run.

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Welcome to May 15, 2026 (theinnermostloop.substack.com)

Claude Opus 4.7 is Anthropic’s successor to Claude Opus 4.6, described in its launch copy as a notable improvement in advanced software engineering (announcement). In this corpus it enters as the model behind Claude Code in Prime Intellect’s run, where it set the 2,930-step optimizer-track record on the NanoGPT speedrun after both agents beat the human baseline.

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Development timeline

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2026-05-15: Agents given idle compute beat the human speedrun baseline

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Developed by

Anthropic

Evaluated on

NanoGPT speedrun

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Claude Opus 4.7
Innermost Loop KB — secondary record
Reporting date: unknown
KB permalink: https://nicholsn.github.io/innermost-loop-kb/systems/claude-opus-4-7
Attributed sources:
- Welcome to May 15, 2026 — https://theinnermostloop.substack.com/p/welcome-to-may-15-2026
This citation does not imply independent verification of linked-source claims.

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