APEX-Accounting

APEX-Accounting is live. No frontier model can reliably close the books.

Introducing new APEX-Accounting benchmark, built with Ramp

Claude Opus 5 debuts at #1 on APEX-Agents and takes the top spot on SWE Integration.

Grok 4.5 debuts at #2 on APEX-SWE and takes the overall Integration lead.

Fable 5's re-release scores 54.8% on APEX-SWE, still 9.5 points ahead of Opus 4.8.

Claude Sonnet 5 ranks #3 on APEX-SWE (43.7%) and jumps into the APEX-Agents top 10.

Anthropic's Claude Fable 5 was released this week. We tested it on APEX-Agents and APEX-SWE ahead of the launch.

Anthropic's Claude Opus 4.8 was released yesterday. We tested it on APEX-Agents and APEX-SWE ahead of the launch.