FrontierCode v1

Original FrontierCode v1 release (pre-v1.1), as reported in the Claude Sonnet 5 system card.

The best 2 · 2 models tested

Top 2 · best setting per model · 2 models, 2 results (0 independent)

Measured by independent testersIndependent Reported by the makerVendor-reported

FrontierCode v1 leaderboard
				Thinking levelSetting
1	Claude Sonnet 5	Anthropic	38.8%	Maxadaptive thinking, effort=max	Maker's own figureVendor-reportedAnthropic ↗	Claude Code	30 Jun 2026
2	Claude Sonnet 4.6	Anthropic	15.1%	Maxadaptive thinking, effort=max	Maker's own figureVendor-reportedAnthropic ↗	Claude Code	30 Jun 2026