Mercor's APEX-Agents leaderboard puts Gemini 4 Carbon first, the only model with a mean above 90%

Mercor, which publishes the APEX-Agents benchmark, says Gemini 4 Carbon debuts at #1 on its leaderboard. These are Mercor's own measurements. APEX-Agents tests long-horizon, multi-step tasks drawn from investment banking, management consulting and corporate law.

• Gemini 4 Carbon: 84.2% Pass@1, 90.4% mean, the only model on the leaderboard with a mean above 90%.
• Gemini 4 Argon: 82.4% Pass@1, 87.4% mean.
• Claude Sonnet 5.5: 75.5% Pass@1, 83.7% mean.

By domain, Carbon is #1 in management consulting (91.9% Pass@1) and investment banking (86.9%), and #2 in corporate law (73.8%), where Argon leads at 76.7%.